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1346 lines
46 KiB
1346 lines
46 KiB
<?php |
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/** |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db; |
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use yii\base\InvalidConfigException; |
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use yii\base\Model; |
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use yii\base\InvalidParamException; |
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use yii\base\ModelEvent; |
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use yii\base\UnknownMethodException; |
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use yii\base\InvalidCallException; |
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use yii\db\Connection; |
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use yii\db\TableSchema; |
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use yii\db\Expression; |
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use yii\helpers\StringHelper; |
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|
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/** |
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* ActiveRecord is the base class for classes representing relational data in terms of objects. |
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* |
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* @include @yii/db/ActiveRecord.md |
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* |
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* @property Connection $db the database connection used by this AR class. |
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* @property TableSchema $tableSchema the schema information of the DB table associated with this AR class. |
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* @property array $oldAttributes the old attribute values (name-value pairs). |
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* @property array $dirtyAttributes the changed attribute values (name-value pairs). |
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* @property boolean $isPrimaryKey whether the record is new and should be inserted when calling [[save()]]. |
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* @property mixed $primaryKey the primary key value. |
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* @property mixed $oldPrimaryKey the old primary key value. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class ActiveRecord extends Model |
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{ |
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/** |
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* @event Event an event that is triggered when the record is initialized via [[init()]]. |
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*/ |
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const EVENT_INIT = 'init'; |
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/** |
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* @event Event an event that is triggered after the record is created and populated with query result. |
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*/ |
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const EVENT_AFTER_FIND = 'afterFind'; |
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/** |
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* @event ModelEvent an event that is triggered before inserting a record. |
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* You may set [[ModelEvent::isValid]] to be false to stop the insertion. |
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*/ |
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const EVENT_BEFORE_INSERT = 'beforeInsert'; |
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/** |
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* @event Event an event that is triggered after a record is inserted. |
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*/ |
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const EVENT_AFTER_INSERT = 'afterInsert'; |
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/** |
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* @event ModelEvent an event that is triggered before updating a record. |
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* You may set [[ModelEvent::isValid]] to be false to stop the update. |
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*/ |
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const EVENT_BEFORE_UPDATE = 'beforeUpdate'; |
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/** |
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* @event Event an event that is triggered after a record is updated. |
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*/ |
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const EVENT_AFTER_UPDATE = 'afterUpdate'; |
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/** |
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* @event ModelEvent an event that is triggered before deleting a record. |
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* You may set [[ModelEvent::isValid]] to be false to stop the deletion. |
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*/ |
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const EVENT_BEFORE_DELETE = 'beforeDelete'; |
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/** |
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* @event Event an event that is triggered after a record is deleted. |
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*/ |
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const EVENT_AFTER_DELETE = 'afterDelete'; |
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/** |
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* @var array attribute values indexed by attribute names |
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*/ |
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private $_attributes = array(); |
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/** |
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* @var array old attribute values indexed by attribute names. |
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*/ |
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private $_oldAttributes; |
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/** |
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* @var array related models indexed by the relation names |
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*/ |
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private $_related; |
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/** |
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* Returns the database connection used by this AR class. |
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* By default, the "db" application component is used as the database connection. |
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* You may override this method if you want to use a different database connection. |
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* @return Connection the database connection used by this AR class. |
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*/ |
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public static function getDb() |
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{ |
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return \Yii::$app->getDb(); |
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} |
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/** |
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* Creates an [[ActiveQuery]] instance for query purpose. |
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* |
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* @include @yii/db/ActiveRecord-find.md |
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* |
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* @param mixed $q the query parameter. This can be one of the followings: |
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* |
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* - a scalar value (integer or string): query by a single primary key value and return the |
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* corresponding record. |
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* - an array of name-value pairs: query by a set of column values and return a single record matching all of them. |
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* - null: return a new [[ActiveQuery]] object for further query purpose. |
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* |
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* @return ActiveQuery|ActiveRecord|null When `$q` is null, a new [[ActiveQuery]] instance |
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* is returned; when `$q` is a scalar or an array, an ActiveRecord object matching it will be |
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* returned (null will be returned if there is no matching). |
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* @throws InvalidConfigException if the AR class does not have a primary key |
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* @see createQuery() |
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*/ |
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public static function find($q = null) |
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{ |
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$query = static::createQuery(); |
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if (is_array($q)) { |
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return $query->where($q)->one(); |
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} elseif ($q !== null) { |
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// query by primary key |
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$primaryKey = static::primaryKey(); |
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if (isset($primaryKey[0])) { |
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return $query->where(array($primaryKey[0] => $q))->one(); |
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} else { |
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throw new InvalidConfigException(get_called_class() . ' must have a primary key.'); |
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} |
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} |
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return $query; |
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} |
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/** |
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* Creates an [[ActiveQuery]] instance with a given SQL statement. |
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* |
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* Note that because the SQL statement is already specified, calling additional |
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* query modification methods (such as `where()`, `order()`) on the created [[ActiveQuery]] |
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* instance will have no effect. However, calling `with()`, `asArray()` or `indexBy()` is |
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* still fine. |
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* |
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* Below is an example: |
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* |
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* ~~~ |
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* $customers = Customer::findBySql('SELECT * FROM tbl_customer')->all(); |
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* ~~~ |
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* |
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* @param string $sql the SQL statement to be executed |
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* @param array $params parameters to be bound to the SQL statement during execution. |
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* @return ActiveQuery the newly created [[ActiveQuery]] instance |
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*/ |
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public static function findBySql($sql, $params = array()) |
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{ |
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$query = static::createQuery(); |
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$query->sql = $sql; |
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return $query->params($params); |
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} |
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/** |
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* Updates the whole table using the provided attribute values and conditions. |
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* For example, to change the status to be 1 for all customers whose status is 2: |
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* |
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* ~~~ |
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* Customer::updateAll(array('status' => 1), 'status = 2'); |
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* ~~~ |
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* |
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* @param array $attributes attribute values (name-value pairs) to be saved into the table |
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* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL. |
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* Please refer to [[Query::where()]] on how to specify this parameter. |
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* @param array $params the parameters (name=>value) to be bound to the query. |
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* @return integer the number of rows updated |
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*/ |
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public static function updateAll($attributes, $condition = '', $params = array()) |
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{ |
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$command = static::getDb()->createCommand(); |
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$command->update(static::tableName(), $attributes, $condition, $params); |
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return $command->execute(); |
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} |
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/** |
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* Updates the whole table using the provided counter changes and conditions. |
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* For example, to increment all customers' age by 1, |
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* |
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* ~~~ |
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* Customer::updateAllCounters(array('age' => 1)); |
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* ~~~ |
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* |
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* @param array $counters the counters to be updated (attribute name => increment value). |
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* Use negative values if you want to decrement the counters. |
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* @param string|array $condition the conditions that will be put in the WHERE part of the UPDATE SQL. |
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* Please refer to [[Query::where()]] on how to specify this parameter. |
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* @param array $params the parameters (name=>value) to be bound to the query. |
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* Do not name the parameters as `:bp0`, `:bp1`, etc., because they are used internally by this method. |
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* @return integer the number of rows updated |
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*/ |
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public static function updateAllCounters($counters, $condition = '', $params = array()) |
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{ |
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$n = 0; |
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foreach ($counters as $name => $value) { |
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$counters[$name] = new Expression("[[$name]]+:bp{$n}", array(":bp{$n}" => $value)); |
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$n++; |
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} |
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$command = static::getDb()->createCommand(); |
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$command->update(static::tableName(), $counters, $condition, $params); |
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return $command->execute(); |
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} |
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/** |
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* Deletes rows in the table using the provided conditions. |
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* WARNING: If you do not specify any condition, this method will delete ALL rows in the table. |
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* |
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* For example, to delete all customers whose status is 3: |
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* |
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* ~~~ |
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* Customer::deleteAll('status = 3'); |
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* ~~~ |
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* |
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* @param string|array $condition the conditions that will be put in the WHERE part of the DELETE SQL. |
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* Please refer to [[Query::where()]] on how to specify this parameter. |
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* @param array $params the parameters (name=>value) to be bound to the query. |
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* @return integer the number of rows deleted |
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*/ |
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public static function deleteAll($condition = '', $params = array()) |
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{ |
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$command = static::getDb()->createCommand(); |
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$command->delete(static::tableName(), $condition, $params); |
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return $command->execute(); |
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} |
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/** |
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* Creates an [[ActiveQuery]] instance. |
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* This method is called by [[find()]], [[findBySql()]] and [[count()]] to start a SELECT query. |
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* You may override this method to return a customized query (e.g. `CustomerQuery` specified |
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* written for querying `Customer` purpose.) |
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* @return ActiveQuery the newly created [[ActiveQuery]] instance. |
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*/ |
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public static function createQuery() |
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{ |
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return new ActiveQuery(array( |
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'modelClass' => get_called_class(), |
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)); |
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} |
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/** |
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* Declares the name of the database table associated with this AR class. |
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* By default this method returns the class name as the table name by calling [[StringHelper::camel2id()]] |
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* with prefix 'tbl_'. For example, 'Customer' becomes 'tbl_customer', and 'OrderItem' becomes |
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* 'tbl_order_item'. You may override this method if the table is not named after this convention. |
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* @return string the table name |
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*/ |
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public static function tableName() |
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{ |
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return 'tbl_' . StringHelper::camel2id(basename(get_called_class()), '_'); |
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} |
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/** |
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* Returns the schema information of the DB table associated with this AR class. |
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* @return TableSchema the schema information of the DB table associated with this AR class. |
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*/ |
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public static function getTableSchema() |
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{ |
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return static::getDb()->getTableSchema(static::tableName()); |
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} |
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|
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/** |
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* Returns the primary key name(s) for this AR class. |
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* The default implementation will return the primary key(s) as declared |
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* in the DB table that is associated with this AR class. |
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* |
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* If the DB table does not declare any primary key, you should override |
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* this method to return the attributes that you want to use as primary keys |
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* for this AR class. |
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* |
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* Note that an array should be returned even for a table with single primary key. |
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* |
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* @return string[] the primary keys of the associated database table. |
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*/ |
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public static function primaryKey() |
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{ |
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return static::getTableSchema()->primaryKey; |
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} |
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/** |
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* Returns the name of the column that stores the lock version for implementing optimistic locking. |
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* |
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* Optimistic locking allows multiple users to access the same record for edits and avoids |
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* potential conflicts. In case when a user attempts to save the record upon some staled data |
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* (because another user has modified the data), a [[StaleObjectException]] exception will be thrown, |
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* and the update or deletion is skipped. |
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* |
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* Optimized locking is only supported by [[update()]] and [[delete()]]. |
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* |
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* To use optimized locking: |
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* |
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* 1. Create a column to store the version number of each row. The column type should be `BIGINT DEFAULT 0`. |
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* Override this method to return the name of this column. |
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* 2. In the Web form that collects the user input, add a hidden field that stores |
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* the lock version of the recording being updated. |
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* 3. In the controller action that does the data updating, try to catch the [[StaleObjectException]] |
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* and implement necessary business logic (e.g. merging the changes, prompting stated data) |
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* to resolve the conflict. |
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* |
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* @return string the column name that stores the lock version of a table row. |
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* If null is returned (default implemented), optimistic locking will not be supported. |
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*/ |
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public function optimisticLock() |
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{ |
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return null; |
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} |
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|
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/** |
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* PHP getter magic method. |
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* This method is overridden so that attributes and related objects can be accessed like properties. |
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* @param string $name property name |
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* @return mixed property value |
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* @see getAttribute |
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*/ |
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public function __get($name) |
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{ |
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if (isset($this->_attributes[$name]) || array_key_exists($name, $this->_attributes)) { |
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return $this->_attributes[$name]; |
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} elseif (isset($this->getTableSchema()->columns[$name])) { |
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return null; |
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} else { |
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$t = strtolower($name); |
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if (isset($this->_related[$t]) || $this->_related !== null && array_key_exists($t, $this->_related)) { |
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return $this->_related[$t]; |
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} |
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$value = parent::__get($name); |
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if ($value instanceof ActiveRelation) { |
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return $this->_related[$t] = $value->multiple ? $value->all() : $value->one(); |
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} else { |
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return $value; |
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} |
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} |
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} |
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|
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/** |
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* PHP setter magic method. |
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* This method is overridden so that AR attributes can be accessed like properties. |
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* @param string $name property name |
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* @param mixed $value property value |
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*/ |
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public function __set($name, $value) |
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{ |
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if (isset($this->_attributes[$name]) || isset($this->getTableSchema()->columns[$name])) { |
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$this->_attributes[$name] = $value; |
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} else { |
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parent::__set($name, $value); |
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} |
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} |
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|
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/** |
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* Checks if a property value is null. |
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* This method overrides the parent implementation by checking if the named attribute is null or not. |
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* @param string $name the property name or the event name |
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* @return boolean whether the property value is null |
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*/ |
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public function __isset($name) |
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{ |
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try { |
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return $this->__get($name) !== null; |
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} catch (\Exception $e) { |
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return false; |
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} |
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} |
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|
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/** |
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* Sets a component property to be null. |
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* This method overrides the parent implementation by clearing |
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* the specified attribute value. |
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* @param string $name the property name or the event name |
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*/ |
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public function __unset($name) |
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{ |
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if (isset($this->getTableSchema()->columns[$name])) { |
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unset($this->_attributes[$name]); |
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} else { |
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$t = strtolower($name); |
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if (isset($this->_related[$t])) { |
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unset($this->_related[$t]); |
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} else { |
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parent::__unset($name); |
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} |
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} |
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} |
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|
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/** |
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* Declares a `has-one` relation. |
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* The declaration is returned in terms of an [[ActiveRelation]] instance |
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* through which the related record can be queried and retrieved back. |
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* |
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* A `has-one` relation means that there is at most one related record matching |
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* the criteria set by this relation, e.g., a customer has one country. |
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* |
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* For example, to declare the `country` relation for `Customer` class, we can write |
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* the following code in the `Customer` class: |
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* |
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* ~~~ |
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* public function getCountry() |
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* { |
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* return $this->hasOne('Country', array('id' => 'country_id')); |
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* } |
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* ~~~ |
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* |
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* Note that in the above, the 'id' key in the `$link` parameter refers to an attribute name |
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* in the related class `Country`, while the 'country_id' value refers to an attribute name |
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* in the current AR class. |
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* |
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* Call methods declared in [[ActiveRelation]] to further customize the relation. |
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* |
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* @param string $class the class name of the related record |
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* @param array $link the primary-foreign key constraint. The keys of the array refer to |
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* the columns in the table associated with the `$class` model, while the values of the |
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* array refer to the corresponding columns in the table associated with this AR class. |
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* @return ActiveRelation the relation object. |
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*/ |
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public function hasOne($class, $link) |
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{ |
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return new ActiveRelation(array( |
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'modelClass' => $this->getNamespacedClass($class), |
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'primaryModel' => $this, |
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'link' => $link, |
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'multiple' => false, |
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)); |
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} |
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|
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/** |
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* Declares a `has-many` relation. |
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* The declaration is returned in terms of an [[ActiveRelation]] instance |
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* through which the related record can be queried and retrieved back. |
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* |
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* A `has-many` relation means that there are multiple related records matching |
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* the criteria set by this relation, e.g., a customer has many orders. |
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* |
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* For example, to declare the `orders` relation for `Customer` class, we can write |
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* the following code in the `Customer` class: |
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* |
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* ~~~ |
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* public function getOrders() |
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* { |
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* return $this->hasMany('Order', array('customer_id' => 'id')); |
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* } |
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* ~~~ |
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* |
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* Note that in the above, the 'customer_id' key in the `$link` parameter refers to |
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* an attribute name in the related class `Order`, while the 'id' value refers to |
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* an attribute name in the current AR class. |
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* |
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* @param string $class the class name of the related record |
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* @param array $link the primary-foreign key constraint. The keys of the array refer to |
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* the columns in the table associated with the `$class` model, while the values of the |
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* array refer to the corresponding columns in the table associated with this AR class. |
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* @return ActiveRelation the relation object. |
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*/ |
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public function hasMany($class, $link) |
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{ |
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return new ActiveRelation(array( |
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'modelClass' => $this->getNamespacedClass($class), |
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'primaryModel' => $this, |
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'link' => $link, |
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'multiple' => true, |
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)); |
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} |
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|
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/** |
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* Populates the named relation with the related records. |
|
* Note that this method does not check if the relation exists or not. |
|
* @param string $name the relation name (case-insensitive) |
|
* @param ActiveRecord|array|null the related records to be populated into the relation. |
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*/ |
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public function populateRelation($name, $records) |
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{ |
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$this->_related[strtolower($name)] = $records; |
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} |
|
|
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/** |
|
* Returns the list of all attribute names of the model. |
|
* The default implementation will return all column names of the table associated with this AR class. |
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* @return array list of attribute names. |
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*/ |
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public function attributes() |
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{ |
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return array_keys($this->getTableSchema()->columns); |
|
} |
|
|
|
/** |
|
* Returns the named attribute value. |
|
* If this record is the result of a query and the attribute is not loaded, |
|
* null will be returned. |
|
* @param string $name the attribute name |
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* @return mixed the attribute value. Null if the attribute is not set or does not exist. |
|
* @see hasAttribute |
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*/ |
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public function getAttribute($name) |
|
{ |
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return isset($this->_attributes[$name]) ? $this->_attributes[$name] : null; |
|
} |
|
|
|
/** |
|
* Sets the named attribute value. |
|
* @param string $name the attribute name |
|
* @param mixed $value the attribute value. |
|
* @see hasAttribute |
|
*/ |
|
public function setAttribute($name, $value) |
|
{ |
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$this->_attributes[$name] = $value; |
|
} |
|
|
|
/** |
|
* Returns the old attribute values. |
|
* @return array the old attribute values (name-value pairs) |
|
*/ |
|
public function getOldAttributes() |
|
{ |
|
return $this->_oldAttributes === null ? array() : $this->_oldAttributes; |
|
} |
|
|
|
/** |
|
* Sets the old attribute values. |
|
* All existing old attribute values will be discarded. |
|
* @param array $values old attribute values to be set. |
|
*/ |
|
public function setOldAttributes($values) |
|
{ |
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$this->_oldAttributes = $values; |
|
} |
|
|
|
/** |
|
* Returns the old value of the named attribute. |
|
* If this record is the result of a query and the attribute is not loaded, |
|
* null will be returned. |
|
* @param string $name the attribute name |
|
* @return mixed the old attribute value. Null if the attribute is not loaded before |
|
* or does not exist. |
|
* @see hasAttribute |
|
*/ |
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public function getOldAttribute($name) |
|
{ |
|
return isset($this->_oldAttributes[$name]) ? $this->_oldAttributes[$name] : null; |
|
} |
|
|
|
/** |
|
* Sets the old value of the named attribute. |
|
* @param string $name the attribute name |
|
* @param mixed $value the old attribute value. |
|
* @see hasAttribute |
|
*/ |
|
public function setOldAttribute($name, $value) |
|
{ |
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$this->_oldAttributes[$name] = $value; |
|
} |
|
|
|
/** |
|
* Returns a value indicating whether the named attribute has been changed. |
|
* @param string $name the name of the attribute |
|
* @return boolean whether the attribute has been changed |
|
*/ |
|
public function isAttributeChanged($name) |
|
{ |
|
if (isset($this->_attributes[$name], $this->_oldAttributes[$name])) { |
|
return $this->_attributes[$name] !== $this->_oldAttributes[$name]; |
|
} else { |
|
return isset($this->_attributes[$name]) || isset($this->_oldAttributes); |
|
} |
|
} |
|
|
|
/** |
|
* Returns the attribute values that have been modified since they are loaded or saved most recently. |
|
* @param string[]|null $names the names of the attributes whose values may be returned if they are |
|
* changed recently. If null, [[attributes()]] will be used. |
|
* @return array the changed attribute values (name-value pairs) |
|
*/ |
|
public function getDirtyAttributes($names = null) |
|
{ |
|
if ($names === null) { |
|
$names = $this->attributes(); |
|
} |
|
$names = array_flip($names); |
|
$attributes = array(); |
|
if ($this->_oldAttributes === null) { |
|
foreach ($this->_attributes as $name => $value) { |
|
if (isset($names[$name])) { |
|
$attributes[$name] = $value; |
|
} |
|
} |
|
} else { |
|
foreach ($this->_attributes as $name => $value) { |
|
if (isset($names[$name]) && (!array_key_exists($name, $this->_oldAttributes) || $value !== $this->_oldAttributes[$name])) { |
|
$attributes[$name] = $value; |
|
} |
|
} |
|
} |
|
return $attributes; |
|
} |
|
|
|
/** |
|
* Saves the current record. |
|
* |
|
* This method will call [[insert()]] when [[isNewRecord]] is true, or [[update()]] |
|
* when [[isNewRecord]] is false. |
|
* |
|
* For example, to save a customer record: |
|
* |
|
* ~~~ |
|
* $customer = new Customer; // or $customer = Customer::find($id); |
|
* $customer->name = $name; |
|
* $customer->email = $email; |
|
* $customer->save(); |
|
* ~~~ |
|
* |
|
* |
|
* @param boolean $runValidation whether to perform validation before saving the record. |
|
* If the validation fails, the record will not be saved to database. |
|
* @param array $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
|
* @return boolean whether the saving succeeds |
|
*/ |
|
public function save($runValidation = true, $attributes = null) |
|
{ |
|
if ($this->getIsNewRecord()) { |
|
return $this->insert($runValidation, $attributes); |
|
} else { |
|
return $this->update($runValidation, $attributes) !== false; |
|
} |
|
} |
|
|
|
/** |
|
* Inserts a row into the associated database table using the attribute values of this record. |
|
* |
|
* This method performs the following steps in order: |
|
* |
|
* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation |
|
* fails, it will skip the rest of the steps; |
|
* 2. call [[afterValidate()]] when `$runValidation` is true. |
|
* 3. call [[beforeSave()]]. If the method returns false, it will skip the |
|
* rest of the steps; |
|
* 4. insert the record into database. If this fails, it will skip the rest of the steps; |
|
* 5. call [[afterSave()]]; |
|
* |
|
* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]], |
|
* [[EVENT_BEFORE_INSERT]], [[EVENT_AFTER_INSERT]] and [[EVENT_AFTER_VALIDATE]] |
|
* will be raised by the corresponding methods. |
|
* |
|
* Only the [[changedAttributes|changed attribute values]] will be inserted into database. |
|
* |
|
* If the table's primary key is auto-incremental and is null during insertion, |
|
* it will be populated with the actual value after insertion. |
|
* |
|
* For example, to insert a customer record: |
|
* |
|
* ~~~ |
|
* $customer = new Customer; |
|
* $customer->name = $name; |
|
* $customer->email = $email; |
|
* $customer->insert(); |
|
* ~~~ |
|
* |
|
* @param boolean $runValidation whether to perform validation before saving the record. |
|
* If the validation fails, the record will not be inserted into the database. |
|
* @param array $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
|
* @return boolean whether the attributes are valid and the record is inserted successfully. |
|
*/ |
|
public function insert($runValidation = true, $attributes = null) |
|
{ |
|
if ($runValidation && !$this->validate($attributes)) { |
|
return false; |
|
} |
|
if ($this->beforeSave(true)) { |
|
$values = $this->getDirtyAttributes($attributes); |
|
if ($values === array()) { |
|
foreach ($this->primaryKey() as $key) { |
|
$values[$key] = isset($this->_attributes[$key]) ? $this->_attributes[$key] : null; |
|
} |
|
} |
|
$db = static::getDb(); |
|
$command = $db->createCommand()->insert($this->tableName(), $values); |
|
if ($command->execute()) { |
|
$table = $this->getTableSchema(); |
|
if ($table->sequenceName !== null) { |
|
foreach ($table->primaryKey as $name) { |
|
if (!isset($this->_attributes[$name])) { |
|
$this->_oldAttributes[$name] = $this->_attributes[$name] = $db->getLastInsertID($table->sequenceName); |
|
break; |
|
} |
|
} |
|
} |
|
foreach ($values as $name => $value) { |
|
$this->_oldAttributes[$name] = $value; |
|
} |
|
$this->afterSave(true); |
|
return true; |
|
} |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* Saves the changes to this active record into the associated database table. |
|
* |
|
* This method performs the following steps in order: |
|
* |
|
* 1. call [[beforeValidate()]] when `$runValidation` is true. If validation |
|
* fails, it will skip the rest of the steps; |
|
* 2. call [[afterValidate()]] when `$runValidation` is true. |
|
* 3. call [[beforeSave()]]. If the method returns false, it will skip the |
|
* rest of the steps; |
|
* 4. save the record into database. If this fails, it will skip the rest of the steps; |
|
* 5. call [[afterSave()]]; |
|
* |
|
* In the above step 1, 2, 3 and 5, events [[EVENT_BEFORE_VALIDATE]], |
|
* [[EVENT_BEFORE_UPDATE]], [[EVENT_AFTER_UPDATE]] and [[EVENT_AFTER_VALIDATE]] |
|
* will be raised by the corresponding methods. |
|
* |
|
* Only the [[changedAttributes|changed attribute values]] will be saved into database. |
|
* |
|
* For example, to update a customer record: |
|
* |
|
* ~~~ |
|
* $customer = Customer::find($id); |
|
* $customer->name = $name; |
|
* $customer->email = $email; |
|
* $customer->update(); |
|
* ~~~ |
|
* |
|
* Note that it is possible the update does not affect any row in the table. |
|
* In this case, this method will return 0. For this reason, you should use the following |
|
* code to check if update() is successful or not: |
|
* |
|
* ~~~ |
|
* if ($this->update() !== false) { |
|
* // update successful |
|
* } else { |
|
* // update failed |
|
* } |
|
* ~~~ |
|
* |
|
* @param boolean $runValidation whether to perform validation before saving the record. |
|
* If the validation fails, the record will not be inserted into the database. |
|
* @param array $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
|
* @return integer|boolean the number of rows affected, or false if validation fails |
|
* or [[beforeSave()]] stops the updating process. |
|
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data |
|
* being updated is outdated. |
|
*/ |
|
public function update($runValidation = true, $attributes = null) |
|
{ |
|
if ($runValidation && !$this->validate($attributes)) { |
|
return false; |
|
} |
|
if ($this->beforeSave(false)) { |
|
$values = $this->getDirtyAttributes($attributes); |
|
if ($values !== array()) { |
|
$condition = $this->getOldPrimaryKey(true); |
|
$lock = $this->optimisticLock(); |
|
if ($lock !== null) { |
|
if (!isset($values[$lock])) { |
|
$values[$lock] = $this->$lock + 1; |
|
} |
|
$condition[$lock] = $this->$lock; |
|
} |
|
// We do not check the return value of updateAll() because it's possible |
|
// that the UPDATE statement doesn't change anything and thus returns 0. |
|
$rows = $this->updateAll($values, $condition); |
|
|
|
if ($lock !== null && !$rows) { |
|
throw new StaleObjectException('The object being updated is outdated.'); |
|
} |
|
|
|
foreach ($values as $name => $value) { |
|
$this->_oldAttributes[$name] = $this->_attributes[$name]; |
|
} |
|
|
|
$this->afterSave(false); |
|
return $rows; |
|
} else { |
|
return 0; |
|
} |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
/** |
|
* Updates one or several counter columns for the current AR object. |
|
* Note that this method differs from [[updateAllCounters()]] in that it only |
|
* saves counters for the current AR object. |
|
* |
|
* An example usage is as follows: |
|
* |
|
* ~~~ |
|
* $post = Post::find($id); |
|
* $post->updateCounters(array('view_count' => 1)); |
|
* ~~~ |
|
* |
|
* @param array $counters the counters to be updated (attribute name => increment value) |
|
* Use negative values if you want to decrement the counters. |
|
* @return boolean whether the saving is successful |
|
* @see updateAllCounters() |
|
*/ |
|
public function updateCounters($counters) |
|
{ |
|
if ($this->updateAllCounters($counters, $this->getOldPrimaryKey(true)) > 0) { |
|
foreach ($counters as $name => $value) { |
|
$this->_attributes[$name] += $value; |
|
$this->_oldAttributes[$name] = $this->_attributes[$name]; |
|
} |
|
return true; |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
/** |
|
* Deletes the table row corresponding to this active record. |
|
* |
|
* This method performs the following steps in order: |
|
* |
|
* 1. call [[beforeDelete()]]. If the method returns false, it will skip the |
|
* rest of the steps; |
|
* 2. delete the record from the database; |
|
* 3. call [[afterDelete()]]. |
|
* |
|
* In the above step 1 and 3, events named [[EVENT_BEFORE_DELETE]] and [[EVENT_AFTER_DELETE]] |
|
* will be raised by the corresponding methods. |
|
* |
|
* @return integer|boolean the number of rows deleted, or false if the deletion is unsuccessful for some reason. |
|
* Note that it is possible the number of rows deleted is 0, even though the deletion execution is successful. |
|
* @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data |
|
* being deleted is outdated. |
|
*/ |
|
public function delete() |
|
{ |
|
if ($this->beforeDelete()) { |
|
// we do not check the return value of deleteAll() because it's possible |
|
// the record is already deleted in the database and thus the method will return 0 |
|
$condition = $this->getOldPrimaryKey(true); |
|
$lock = $this->optimisticLock(); |
|
if ($lock !== null) { |
|
$condition[$lock] = $this->$lock; |
|
} |
|
$rows = $this->deleteAll($condition); |
|
if ($lock !== null && !$rows) { |
|
throw new StaleObjectException('The object being deleted is outdated.'); |
|
} |
|
$this->_oldAttributes = null; |
|
$this->afterDelete(); |
|
return $rows; |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
/** |
|
* Returns a value indicating whether the current record is new. |
|
* @return boolean whether the record is new and should be inserted when calling [[save()]]. |
|
*/ |
|
public function getIsNewRecord() |
|
{ |
|
return $this->_oldAttributes === null; |
|
} |
|
|
|
/** |
|
* Initializes the object. |
|
* This method is called at the end of the constructor. |
|
* The default implementation will trigger an [[EVENT_INIT]] event. |
|
* If you override this method, make sure you call the parent implementation at the end |
|
* to ensure triggering of the event. |
|
*/ |
|
public function init() |
|
{ |
|
parent::init(); |
|
$this->trigger(self::EVENT_INIT); |
|
} |
|
|
|
/** |
|
* This method is called when the AR object is created and populated with the query result. |
|
* The default implementation will trigger an [[EVENT_AFTER_FIND]] event. |
|
* When overriding this method, make sure you call the parent implementation to ensure the |
|
* event is triggered. |
|
*/ |
|
public function afterFind() |
|
{ |
|
$this->trigger(self::EVENT_AFTER_FIND); |
|
} |
|
|
|
/** |
|
* Sets the value indicating whether the record is new. |
|
* @param boolean $value whether the record is new and should be inserted when calling [[save()]]. |
|
* @see getIsNewRecord |
|
*/ |
|
public function setIsNewRecord($value) |
|
{ |
|
$this->_oldAttributes = $value ? null : $this->_attributes; |
|
} |
|
|
|
/** |
|
* This method is called at the beginning of inserting or updating a record. |
|
* The default implementation will trigger an [[EVENT_BEFORE_INSERT]] event when `$insert` is true, |
|
* or an [[EVENT_BEFORE_UPDATE]] event if `$insert` is false. |
|
* When overriding this method, make sure you call the parent implementation like the following: |
|
* |
|
* ~~~ |
|
* public function beforeSave($insert) |
|
* { |
|
* if (parent::beforeSave($insert)) { |
|
* // ...custom code here... |
|
* return true; |
|
* } else { |
|
* return false; |
|
* } |
|
* } |
|
* ~~~ |
|
* |
|
* @param boolean $insert whether this method called while inserting a record. |
|
* If false, it means the method is called while updating a record. |
|
* @return boolean whether the insertion or updating should continue. |
|
* If false, the insertion or updating will be cancelled. |
|
*/ |
|
public function beforeSave($insert) |
|
{ |
|
$event = new ModelEvent; |
|
$this->trigger($insert ? self::EVENT_BEFORE_INSERT : self::EVENT_BEFORE_UPDATE, $event); |
|
return $event->isValid; |
|
} |
|
|
|
/** |
|
* This method is called at the end of inserting or updating a record. |
|
* The default implementation will trigger an [[EVENT_AFTER_INSERT]] event when `$insert` is true, |
|
* or an [[EVENT_AFTER_UPDATE]] event if `$insert` is false. |
|
* When overriding this method, make sure you call the parent implementation so that |
|
* the event is triggered. |
|
* @param boolean $insert whether this method called while inserting a record. |
|
* If false, it means the method is called while updating a record. |
|
*/ |
|
public function afterSave($insert) |
|
{ |
|
$this->trigger($insert ? self::EVENT_AFTER_INSERT : self::EVENT_AFTER_UPDATE); |
|
} |
|
|
|
/** |
|
* This method is invoked before deleting a record. |
|
* The default implementation raises the [[EVENT_BEFORE_DELETE]] event. |
|
* When overriding this method, make sure you call the parent implementation like the following: |
|
* |
|
* ~~~ |
|
* public function beforeDelete() |
|
* { |
|
* if (parent::beforeDelete()) { |
|
* // ...custom code here... |
|
* return true; |
|
* } else { |
|
* return false; |
|
* } |
|
* } |
|
* ~~~ |
|
* |
|
* @return boolean whether the record should be deleted. Defaults to true. |
|
*/ |
|
public function beforeDelete() |
|
{ |
|
$event = new ModelEvent; |
|
$this->trigger(self::EVENT_BEFORE_DELETE, $event); |
|
return $event->isValid; |
|
} |
|
|
|
/** |
|
* This method is invoked after deleting a record. |
|
* The default implementation raises the [[EVENT_AFTER_DELETE]] event. |
|
* You may override this method to do postprocessing after the record is deleted. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
*/ |
|
public function afterDelete() |
|
{ |
|
$this->trigger(self::EVENT_AFTER_DELETE); |
|
} |
|
|
|
/** |
|
* Repopulates this active record with the latest data. |
|
* @param array $attributes |
|
* @return boolean whether the row still exists in the database. If true, the latest data |
|
* will be populated to this active record. |
|
*/ |
|
public function refresh($attributes = null) |
|
{ |
|
$record = $this->find($this->getPrimaryKey(true)); |
|
if ($record === null) { |
|
return false; |
|
} |
|
if ($attributes === null) { |
|
foreach ($this->attributes() as $name) { |
|
$this->_attributes[$name] = $record->_attributes[$name]; |
|
} |
|
$this->_oldAttributes = $this->_attributes; |
|
} else { |
|
foreach ($attributes as $name) { |
|
$this->_oldAttributes[$name] = $this->_attributes[$name] = $record->_attributes[$name]; |
|
} |
|
} |
|
return true; |
|
} |
|
|
|
/** |
|
* Returns a value indicating whether the given active record is the same as the current one. |
|
* The comparison is made by comparing the table names and the primary key values of the two active records. |
|
* @param ActiveRecord $record record to compare to |
|
* @return boolean whether the two active records refer to the same row in the same database table. |
|
*/ |
|
public function equals($record) |
|
{ |
|
return $this->tableName() === $record->tableName() && $this->getPrimaryKey() === $record->getPrimaryKey(); |
|
} |
|
|
|
/** |
|
* Returns the primary key value(s). |
|
* @param boolean $asArray whether to return the primary key value as an array. If true, |
|
* the return value will be an array with column names as keys and column values as values. |
|
* Note that for composite primary keys, an array will always be returned regardless of this parameter value. |
|
* @return mixed the primary key value. An array (column name=>column value) is returned if the primary key |
|
* is composite or `$asArray` is true. A string is returned otherwise (null will be returned if |
|
* the key value is null). |
|
*/ |
|
public function getPrimaryKey($asArray = false) |
|
{ |
|
$keys = $this->primaryKey(); |
|
if (count($keys) === 1 && !$asArray) { |
|
return isset($this->_attributes[$keys[0]]) ? $this->_attributes[$keys[0]] : null; |
|
} else { |
|
$values = array(); |
|
foreach ($keys as $name) { |
|
$values[$name] = isset($this->_attributes[$name]) ? $this->_attributes[$name] : null; |
|
} |
|
return $values; |
|
} |
|
} |
|
|
|
/** |
|
* Returns the old primary key value(s). |
|
* This refers to the primary key value that is populated into the record |
|
* after executing a find method (e.g. find(), findAll()). |
|
* The value remains unchanged even if the primary key attribute is manually assigned with a different value. |
|
* @param boolean $asArray whether to return the primary key value as an array. If true, |
|
* the return value will be an array with column name as key and column value as value. |
|
* If this is false (default), a scalar value will be returned for non-composite primary key. |
|
* @return mixed the old primary key value. An array (column name=>column value) is returned if the primary key |
|
* is composite or `$asArray` is true. A string is returned otherwise (null will be returned if |
|
* the key value is null). |
|
*/ |
|
public function getOldPrimaryKey($asArray = false) |
|
{ |
|
$keys = $this->primaryKey(); |
|
if (count($keys) === 1 && !$asArray) { |
|
return isset($this->_oldAttributes[$keys[0]]) ? $this->_oldAttributes[$keys[0]] : null; |
|
} else { |
|
$values = array(); |
|
foreach ($keys as $name) { |
|
$values[$name] = isset($this->_oldAttributes[$name]) ? $this->_oldAttributes[$name] : null; |
|
} |
|
return $values; |
|
} |
|
} |
|
|
|
/** |
|
* Creates an active record object using a row of data. |
|
* This method is called by [[ActiveQuery]] to populate the query results |
|
* into Active Records. |
|
* @param array $row attribute values (name => value) |
|
* @return ActiveRecord the newly created active record. |
|
*/ |
|
public static function create($row) |
|
{ |
|
$record = static::instantiate($row); |
|
$columns = static::getTableSchema()->columns; |
|
foreach ($row as $name => $value) { |
|
if (isset($columns[$name])) { |
|
$record->_attributes[$name] = $value; |
|
} else { |
|
$record->$name = $value; |
|
} |
|
} |
|
$record->_oldAttributes = $record->_attributes; |
|
$record->afterFind(); |
|
return $record; |
|
} |
|
|
|
/** |
|
* Creates an active record instance. |
|
* This method is called by [[create()]]. |
|
* You may override this method if the instance being created |
|
* depends on the row data to be populated into the record. |
|
* For example, by creating a record based on the value of a column, |
|
* you may implement the so-called single-table inheritance mapping. |
|
* @param array $row row data to be populated into the record. |
|
* @return ActiveRecord the newly created active record |
|
*/ |
|
public static function instantiate($row) |
|
{ |
|
return new static; |
|
} |
|
|
|
/** |
|
* Returns whether there is an element at the specified offset. |
|
* This method is required by the interface ArrayAccess. |
|
* @param mixed $offset the offset to check on |
|
* @return boolean whether there is an element at the specified offset. |
|
*/ |
|
public function offsetExists($offset) |
|
{ |
|
return $this->__isset($offset); |
|
} |
|
|
|
/** |
|
* Returns the relation object with the specified name. |
|
* A relation is defined by a getter method which returns an [[ActiveRelation]] object. |
|
* It can be declared in either the Active Record class itself or one of its behaviors. |
|
* @param string $name the relation name |
|
* @return ActiveRelation the relation object |
|
* @throws InvalidParamException if the named relation does not exist. |
|
*/ |
|
public function getRelation($name) |
|
{ |
|
$getter = 'get' . $name; |
|
try { |
|
$relation = $this->$getter(); |
|
if ($relation instanceof ActiveRelation) { |
|
return $relation; |
|
} |
|
} catch (UnknownMethodException $e) { |
|
throw new InvalidParamException(get_class($this) . ' has no relation named "' . $name . '".'); |
|
} |
|
} |
|
|
|
/** |
|
* Establishes the relationship between two models. |
|
* |
|
* The relationship is established by setting the foreign key value(s) in one model |
|
* to be the corresponding primary key value(s) in the other model. |
|
* The model with the foreign key will be saved into database without performing validation. |
|
* |
|
* If the relationship involves a pivot table, a new row will be inserted into the |
|
* pivot table which contains the primary key values from both models. |
|
* |
|
* Note that this method requires that the primary key value is not null. |
|
* |
|
* @param string $name the name of the relationship |
|
* @param ActiveRecord $model the model to be linked with the current one. |
|
* @param array $extraColumns additional column values to be saved into the pivot table. |
|
* This parameter is only meaningful for a relationship involving a pivot table |
|
* (i.e., a relation set with `[[ActiveRelation::via()]]` or `[[ActiveRelation::viaTable()]]`.) |
|
* @throws InvalidCallException if the method is unable to link two models. |
|
*/ |
|
public function link($name, $model, $extraColumns = array()) |
|
{ |
|
$relation = $this->getRelation($name); |
|
|
|
if ($relation->via !== null) { |
|
if (is_array($relation->via)) { |
|
/** @var $viaRelation ActiveRelation */ |
|
list($viaName, $viaRelation) = $relation->via; |
|
/** @var $viaClass ActiveRecord */ |
|
$viaClass = $viaRelation->modelClass; |
|
$viaTable = $viaClass::tableName(); |
|
// unset $viaName so that it can be reloaded to reflect the change |
|
unset($this->_related[strtolower($viaName)]); |
|
} else { |
|
$viaRelation = $relation->via; |
|
$viaTable = reset($relation->via->from); |
|
} |
|
$columns = array(); |
|
foreach ($viaRelation->link as $a => $b) { |
|
$columns[$a] = $this->$b; |
|
} |
|
foreach ($relation->link as $a => $b) { |
|
$columns[$b] = $model->$a; |
|
} |
|
foreach ($extraColumns as $k => $v) { |
|
$columns[$k] = $v; |
|
} |
|
static::getDb()->createCommand() |
|
->insert($viaTable, $columns)->execute(); |
|
} else { |
|
$p1 = $model->isPrimaryKey(array_keys($relation->link)); |
|
$p2 = $this->isPrimaryKey(array_values($relation->link)); |
|
if ($p1 && $p2) { |
|
if ($this->getIsNewRecord() && $model->getIsNewRecord()) { |
|
throw new InvalidCallException('Unable to link models: both models are newly created.'); |
|
} elseif ($this->getIsNewRecord()) { |
|
$this->bindModels(array_flip($relation->link), $this, $model); |
|
} else { |
|
$this->bindModels($relation->link, $model, $this); |
|
} |
|
} elseif ($p1) { |
|
$this->bindModels(array_flip($relation->link), $this, $model); |
|
} elseif ($p2) { |
|
$this->bindModels($relation->link, $model, $this); |
|
} else { |
|
throw new InvalidCallException('Unable to link models: the link does not involve any primary key.'); |
|
} |
|
} |
|
|
|
// update lazily loaded related objects |
|
if (!$relation->multiple) { |
|
$this->_related[$name] = $model; |
|
} elseif (isset($this->_related[$name])) { |
|
if ($relation->indexBy !== null) { |
|
$indexBy = $relation->indexBy; |
|
$this->_related[$name][$model->$indexBy] = $model; |
|
} else { |
|
$this->_related[$name][] = $model; |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* Destroys the relationship between two models. |
|
* |
|
* The model with the foreign key of the relationship will be deleted if `$delete` is true. |
|
* Otherwise, the foreign key will be set null and the model will be saved without validation. |
|
* |
|
* @param string $name the name of the relationship. |
|
* @param ActiveRecord $model the model to be unlinked from the current one. |
|
* @param boolean $delete whether to delete the model that contains the foreign key. |
|
* If false, the model's foreign key will be set null and saved. |
|
* If true, the model containing the foreign key will be deleted. |
|
* @throws InvalidCallException if the models cannot be unlinked |
|
*/ |
|
public function unlink($name, $model, $delete = false) |
|
{ |
|
$relation = $this->getRelation($name); |
|
|
|
if ($relation->via !== null) { |
|
if (is_array($relation->via)) { |
|
/** @var $viaRelation ActiveRelation */ |
|
list($viaName, $viaRelation) = $relation->via; |
|
/** @var $viaClass ActiveRecord */ |
|
$viaClass = $viaRelation->modelClass; |
|
$viaTable = $viaClass::tableName(); |
|
unset($this->_related[strtolower($viaName)]); |
|
} else { |
|
$viaRelation = $relation->via; |
|
$viaTable = reset($relation->via->from); |
|
} |
|
$columns = array(); |
|
foreach ($viaRelation->link as $a => $b) { |
|
$columns[$a] = $this->$b; |
|
} |
|
foreach ($relation->link as $a => $b) { |
|
$columns[$b] = $model->$a; |
|
} |
|
$command = static::getDb()->createCommand(); |
|
if ($delete) { |
|
$command->delete($viaTable, $columns)->execute(); |
|
} else { |
|
$nulls = array(); |
|
foreach (array_keys($columns) as $a) { |
|
$nulls[$a] = null; |
|
} |
|
$command->update($viaTable, $nulls, $columns)->execute(); |
|
} |
|
} else { |
|
$p1 = $model->isPrimaryKey(array_keys($relation->link)); |
|
$p2 = $this->isPrimaryKey(array_values($relation->link)); |
|
if ($p1 && $p2 || $p2) { |
|
foreach ($relation->link as $a => $b) { |
|
$model->$a = null; |
|
} |
|
$delete ? $model->delete() : $model->save(false); |
|
} elseif ($p1) { |
|
foreach ($relation->link as $b) { |
|
$this->$b = null; |
|
} |
|
$delete ? $this->delete() : $this->save(false); |
|
} else { |
|
throw new InvalidCallException('Unable to unlink models: the link does not involve any primary key.'); |
|
} |
|
} |
|
|
|
if (!$relation->multiple) { |
|
unset($this->_related[$name]); |
|
} elseif (isset($this->_related[$name])) { |
|
/** @var $b ActiveRecord */ |
|
foreach ($this->_related[$name] as $a => $b) { |
|
if ($model->getPrimaryKey() == $b->getPrimaryKey()) { |
|
unset($this->_related[$name][$a]); |
|
} |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* Changes the given class name into a namespaced one. |
|
* If the given class name is already namespaced, no change will be made. |
|
* Otherwise, the class name will be changed to use the same namespace as |
|
* the current AR class. |
|
* @param string $class the class name to be namespaced |
|
* @return string the namespaced class name |
|
*/ |
|
protected function getNamespacedClass($class) |
|
{ |
|
if (strpos($class, '\\') === false) { |
|
$primaryClass = get_class($this); |
|
if (($pos = strrpos($primaryClass, '\\')) !== false) { |
|
return substr($primaryClass, 0, $pos + 1) . $class; |
|
} |
|
} |
|
return $class; |
|
} |
|
|
|
/** |
|
* @param array $link |
|
* @param ActiveRecord $foreignModel |
|
* @param ActiveRecord $primaryModel |
|
* @throws InvalidCallException |
|
*/ |
|
private function bindModels($link, $foreignModel, $primaryModel) |
|
{ |
|
foreach ($link as $fk => $pk) { |
|
$value = $primaryModel->$pk; |
|
if ($value === null) { |
|
throw new InvalidCallException('Unable to link models: the primary key of ' . get_class($primaryModel) . ' is null.'); |
|
} |
|
$foreignModel->$fk = $value; |
|
} |
|
$foreignModel->save(false); |
|
} |
|
|
|
/** |
|
* @param array $keys |
|
* @return boolean |
|
*/ |
|
private function isPrimaryKey($keys) |
|
{ |
|
$pks = $this->primaryKey(); |
|
foreach ($keys as $key) { |
|
if (!in_array($key, $pks, true)) { |
|
return false; |
|
} |
|
} |
|
return true; |
|
} |
|
}
|
|
|