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926 lines
32 KiB
926 lines
32 KiB
<?php |
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/** |
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* ActiveRecord class file. |
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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 © 2008-2012 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db\ar; |
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use yii\base\Model; |
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use yii\base\Event; |
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use yii\base\ModelEvent; |
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use yii\db\Exception; |
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use yii\db\dao\Connection; |
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use yii\db\dao\TableSchema; |
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use yii\db\dao\Query; |
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use yii\db\dao\Expression; |
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use yii\util\StringHelper; |
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/** |
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* ActiveRecord is the base class for classes representing relational data. |
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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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* @property array $attributes attribute values indexed by attribute names |
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* |
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* ActiveRecord provides a set of events for further customization: |
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* |
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* - `beforeInsert`. Raised before the record is saved. |
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* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[save()]] will be stopped. |
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* - `afterInsert`. Raised after the record is saved. |
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* - `beforeUpdate`. Raised before the record is saved. |
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* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[save()]] will be stopped. |
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* - `afterUpdate`. Raised after the record is saved. |
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* - `beforeDelete`. Raised before the record is deleted. |
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* By setting [[\yii\base\ModelEvent::isValid]] to be false, the normal [[delete()]] process will be stopped. |
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* - `afterDelete`. Raised after the record is deleted. |
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* |
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*/ |
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abstract class ActiveRecord extends Model |
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{ |
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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 $_related; |
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/** |
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* Returns the database connection used by this AR class. |
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* By default, the "db" application component is used as the database connection. |
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* You may override this method if you want to use a different database connection. |
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* @return Connection the database connection used by this AR class. |
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*/ |
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public static function getDbConnection() |
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{ |
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return \Yii::$application->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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* Because [[ActiveQuery]] implements a set of query building methods, |
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* additional query conditions can be specified by calling the methods of [[ActiveQuery]]. |
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* |
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* Below are some examples: |
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* |
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* ~~~ |
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* // find all customers |
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* $customers = Customer::find()->all(); |
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* // find a single customer whose primary key value is 10 |
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* $customer = Customer::find(10); |
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* // the above is equivalent to: |
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* Customer::find()->where(array('id' => 10))->one(); |
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* // find all active customers and order them by their age: |
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* $customers = Customer::find() |
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* ->where(array('status' => 1)) |
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* ->orderBy('age') |
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* ->all(); |
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* // or alternatively: |
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* $customers = Customer::find(array( |
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* 'where' => array('status' => 1), |
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* 'orderBy' => 'age', |
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* ))->all(); |
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* ~~~ |
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* |
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* @param mixed $q the query parameter. This can be one of the followings: |
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* |
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* - a scalar value (integer or string): query by a single primary key value and return the |
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* corresponding record. |
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* - an array of name-value pairs: it will be used to configure the [[ActiveQuery]] object. |
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* |
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* @return ActiveQuery|ActiveRecord|boolean the [[ActiveQuery]] instance for query purpose, or |
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* the ActiveRecord object when a scalar is passed to this method which is considered to be a |
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* primary key value (false will be returned if no record is found in this case.) |
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*/ |
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public static function find($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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foreach ($q as $name => $value) { |
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$query->$name = $value; |
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} |
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} elseif ($q !== null) { |
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// query by primary key |
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$primaryKey = static::primaryKey(); |
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return $query->where(array($primaryKey[0] => $q))->one(); |
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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 and queries by a given SQL statement. |
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* Note that because the SQL statement is already specified, calling further |
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* query methods (such as `where()`, `order()`) on [[ActiveQuery]] will have no effect. |
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* Methods such as `with()`, `asArray()` can still be called though. |
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* @param string $sql the SQL statement to be executed |
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* @param array $params parameters to be bound to the SQL statement during execution. |
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* @return ActiveQuery the [[ActiveQuery]] instance |
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*/ |
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public static function findBySql($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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* Performs a COUNT query for this AR class. |
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* |
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* Below are some usage examples: |
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* |
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* ~~~ |
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* // count the total number of customers |
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* echo Customer::count()->value(); |
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* // count the number of active customers: |
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* echo Customer::count(array( |
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* 'where' => array('status' => 1), |
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* ))->value(); |
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* // equivalent usage: |
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* echo Customer::count() |
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* ->where(array('status' => 1)) |
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* ->value(); |
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* // customize the count option |
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* echo Customer::count('COUNT(DISTINCT age)')->value(); |
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* ~~~ |
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* |
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* @param array|string $q the query option. This can be one of the followings: |
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* |
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* - an array of name-value pairs: it will be used to configure the [[ActiveQuery]] object. |
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* - a string: the count expression, e.g. 'COUNT(DISTINCT age)'. |
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* |
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* @return ActiveQuery the [[ActiveQuery]] instance |
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*/ |
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public static function count($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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foreach ($q as $name => $value) { |
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$query->$name = $value; |
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} |
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} elseif ($q !== null) { |
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$query->select = array($q); |
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} |
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if ($query->select === null) { |
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$query->select = array('COUNT(*)'); |
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} |
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return $query; |
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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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* @param array $attributes attribute values to be saved into the table |
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* @param string|array $condition the conditions that will be put in the WHERE part. |
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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 = '', $params = array()) |
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{ |
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$query = new Query; |
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$query->update(static::tableName(), $attributes, $condition, $params); |
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return $query->createCommand(static::getDbConnection())->execute(); |
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} |
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/** |
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* Updates the whole table using the provided counter values and conditions. |
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* @param array $counters the counters to be updated (attribute name => increment value). |
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* @param string|array $condition the conditions that will be put in the WHERE part. |
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* Please refer to [[Query::where()]] on how to specify this parameter. |
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* @param array $params the parameters (name=>value) to be bound to the query. |
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* @return integer the number of rows updated |
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*/ |
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public static function updateAllCounters($counters, $condition = '', $params = array()) |
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{ |
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$db = static::getDbConnection(); |
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foreach ($counters as $name => $value) { |
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$value = (int)$value; |
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$quotedName = $db->quoteColumnName($name, true); |
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$counters[$name] = new Expression($value >= 0 ? "$quotedName+$value" : "$quotedName$value"); |
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} |
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$query = new Query; |
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$query->update(static::tableName(), $counters, $condition, $params); |
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return $query->createCommand($db)->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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* @param string|array $condition the conditions that will be put in the WHERE part. |
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* Please refer to [[Query::where()]] on how to specify this parameter. |
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* @param array $params the parameters (name=>value) to be bound to the query. |
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* @return integer the number of rows updated |
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*/ |
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public static function deleteAll($condition = '', $params = array()) |
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{ |
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$query = new Query; |
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$query->delete(static::tableName(), $condition, $params); |
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return $query->createCommand(static::getDbConnection())->execute(); |
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} |
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/** |
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* Creates a [[ActiveQuery]] instance. |
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* This method is called by [[find()]] and [[findBySql()]] to start a SELECT query. |
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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('modelClass' => get_called_class())); |
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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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* For example, 'Customer' becomes 'customer', and 'OrderDetail' becomes 'order_detail'. |
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* 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 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::getDbConnection()->getTableSchema(static::tableName()); |
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} |
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/** |
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* Returns the primary keys for this AR class. |
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* The default implementation will return the primary keys as declared |
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* in the DB table that is associated with this AR class. |
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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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* @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 default named scope that should be implicitly applied to all queries for this model. |
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* Note, the default scope only applies to SELECT queries. It is ignored for INSERT, UPDATE and DELETE queries. |
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* The default implementation simply returns an empty array. You may override this method |
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* if the model needs to be queried with some default criteria (e.g. only non-deleted users should be returned). |
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* @param ActiveQuery |
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*/ |
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public static function defaultScope($query) |
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{ |
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// todo: should we drop this? |
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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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} elseif (method_exists($this, $name)) { |
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// related records |
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if (isset($this->_related[$name]) || isset($this->_related) && array_key_exists($name, $this->_related)) { |
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return $this->_related[$name]; |
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} else { |
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// lazy loading related records |
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/** @var $relation ActiveRelation */ |
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$relation = $this->$name(); |
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return $this->_related[$name] = $relation->multiple ? $relation->all() : $relation->one(); |
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} |
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} else { |
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return parent::__get($name); |
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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->getTableSchema()->columns[$name])) { |
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$this->_attributes[$name] = $value; |
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} elseif (method_exists($this, $name)) { |
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$this->_related[$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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* Checks if a property value is null. |
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* This method overrides the parent implementation by checking |
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* 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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if (isset($this->_attributes[$name]) || isset($this->_related[$name])) { |
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return true; |
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} elseif (isset($this->getTableSchema()->columns[$name]) || method_exists($this, $name)) { |
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return false; |
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} else { |
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return parent::__isset($name); |
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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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} elseif (method_exists($this, $name)) { |
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unset($this->_related[$name]); |
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} else { |
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parent::__unset($name); |
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} |
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} |
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|
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/** |
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* 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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* @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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* @param array $properties additional property values that should be used to |
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* initialize the newly created relation object. |
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* @return ActiveRelation the relation object. |
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*/ |
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public function hasOne($class, $link, $properties = array()) |
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{ |
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if (strpos($class, '\\') === false) { |
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$primaryClass = get_class($this); |
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if (($pos = strrpos($primaryClass, '\\')) !== false) { |
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$class = substr($primaryClass, 0, $pos + 1) . $class; |
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} |
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} |
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$properties['modelClass'] = $class; |
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$properties['primaryModel'] = $this; |
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$properties['link'] = $link; |
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$properties['multiple'] = false; |
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return new ActiveRelation($properties); |
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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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* @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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* @param array $properties additional property values that should be used to |
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* initialize the newly created relation object. |
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* @return ActiveRelation the relation object. |
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*/ |
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public function hasMany($class, $link, $properties = array()) |
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{ |
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$relation = $this->hasOne($class, $link, $properties); |
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$relation->multiple = true; |
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return $relation; |
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} |
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/** |
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* Initializes the internal storage for the relation. |
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* This method is internally used by [[ActiveQuery]] when populating relation data. |
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* @param ActiveRelation $relation the relation object |
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*/ |
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public function initRelation($relation) |
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{ |
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$this->_related[$relation->name] = $relation->hasMany ? array() : null; |
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} |
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/** |
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* @param ActiveRelation $relation |
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* @param ActiveRecord $record |
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*/ |
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public function addRelatedRecord($relation, $record) |
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{ |
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if ($relation->hasMany) { |
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if ($relation->indexBy !== null) { |
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$this->_related[$relation->name][$record->{$relation->indexBy}] = $record; |
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} else { |
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$this->_related[$relation->name][] = $record; |
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} |
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} else { |
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$this->_related[$relation->name] = $record; |
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} |
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} |
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|
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/** |
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* Returns the related record(s). |
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* This method will return the related record(s) of the current record. |
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* If the relation is HAS_ONE or BELONGS_TO, it will return a single object |
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* or null if the object does not exist. |
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* If the relation is HAS_MANY or MANY_MANY, it will return an array of objects |
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* or an empty array. |
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* @param ActiveRelation|string $relation the relation object or the name of the relation |
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* @param array|\Closure $params additional parameters that customize the query conditions as specified in the relation declaration. |
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* @return mixed the related object(s). |
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* @throws Exception if the relation is not specified in [[relations()]]. |
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*/ |
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public function findByRelation($relation, $params = array()) |
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{ |
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if (is_string($relation)) { |
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$md = $this->getMetaData(); |
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if (!isset($md->relations[$relation])) { |
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throw new Exception(get_class($this) . ' has no relation named "' . $relation . '".'); |
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} |
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$relation = $md->relations[$relation]; |
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} |
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$relation = clone $relation; |
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if ($params instanceof \Closure) { |
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$params($relation); |
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} else { |
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foreach ($params as $name => $value) { |
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$relation->$name = $value; |
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} |
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} |
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|
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$finder = new ActiveFinder($this->getDbConnection()); |
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return $finder->findWithRecord($this, $relation); |
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} |
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|
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/** |
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* Returns the list of all attribute names of the model. |
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* The default implementation will return all column names of the table associated with this AR class. |
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* @return array list of attribute names. |
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*/ |
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public function attributes() |
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{ |
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return array_keys($this->getTableSchema()->columns); |
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} |
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|
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/** |
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* Returns the named attribute value. |
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* If this is a new record and the attribute is not set before, |
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* the default column value will be returned. |
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* If this record is the result of a query and the attribute is not loaded, |
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* null will be returned. |
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* You may also use $this->AttributeName to obtain the attribute value. |
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* @param string $name the attribute name |
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* @return mixed the attribute value. Null if the attribute is not set or does not exist. |
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* @see hasAttribute |
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*/ |
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public function getAttribute($name) |
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{ |
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return isset($this->_attributes[$name]) ? $this->_attributes[$name] : null; |
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} |
|
|
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/** |
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* Sets the named attribute value. |
|
* You may also use $this->AttributeName to set the attribute value. |
|
* @param string $name the attribute name |
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* @param mixed $value the attribute value. |
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* @see hasAttribute |
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*/ |
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public function setAttribute($name, $value) |
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{ |
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$this->_attributes[$name] = $value; |
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} |
|
|
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/** |
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* Returns the attribute values that have been modified since they are loaded or saved most recently. |
|
* @param string[]|null $names the names of the attributes whose values may be returned if they are |
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* changed recently. If null, [[attributes()]] will be used. |
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* @return array the changed attribute values (name-value pairs) |
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*/ |
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public function getChangedAttributes($names = null) |
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{ |
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if ($names === null) { |
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$names = $this->attributes(); |
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} |
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$names = array_flip($names); |
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$attributes = array(); |
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if ($this->_oldAttributes === null) { |
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foreach ($this->_attributes as $name => $value) { |
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if (isset($names[$name])) { |
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$attributes[$name] = $value; |
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} |
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} |
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} else { |
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foreach ($this->_attributes as $name => $value) { |
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if (isset($names[$name]) && (!array_key_exists($name, $this->_oldAttributes) || $value !== $this->_oldAttributes[$name])) { |
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$attributes[$name] = $value; |
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} |
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} |
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} |
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return $attributes; |
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} |
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|
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/** |
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* Saves the current record. |
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* |
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* The record is inserted as a row into the database table if its {@link isNewRecord} |
|
* property is true (usually the case when the record is created using the 'new' |
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* operator). Otherwise, it will be used to update the corresponding row in the table |
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* (usually the case if the record is obtained using one of those 'find' methods.) |
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* |
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* Validation will be performed before saving the record. If the validation fails, |
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* the record will not be saved. You can call {@link getErrors()} to retrieve the |
|
* validation errors. |
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* |
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* If the record is saved via insertion, its {@link isNewRecord} property will be |
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* set false, and its {@link scenario} property will be set to be 'update'. |
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* And if its primary key is auto-incremental and is not set before insertion, |
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* the primary key will be populated with the automatically generated key value. |
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* |
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* @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 $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
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* @return boolean whether the saving succeeds |
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*/ |
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public function save($runValidation = true, $attributes = null) |
|
{ |
|
if (!$runValidation || $this->validate($attributes)) { |
|
return $this->getIsNewRecord() ? $this->insert($attributes) : $this->update($attributes); |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* Inserts a row into the table based on this active record attributes. |
|
* If the table's primary key is auto-incremental and is null before insertion, |
|
* it will be populated with the actual value after insertion. |
|
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation. |
|
* After the record is inserted to DB successfully, its {@link isNewRecord} property will be set false, |
|
* and its {@link scenario} property will be set to be 'update'. |
|
* @param array $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
|
* @return boolean whether the attributes are valid and the record is inserted successfully. |
|
* @throws Exception if the record is not new |
|
*/ |
|
public function insert($attributes = null) |
|
{ |
|
if ($this->beforeInsert()) { |
|
$query = new Query; |
|
$values = $this->getChangedAttributes($attributes); |
|
$db = $this->getDbConnection(); |
|
$command = $query->insert($this->tableName(), $values)->createCommand($db); |
|
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->afterInsert(); |
|
return true; |
|
} |
|
} |
|
return false; |
|
} |
|
|
|
/** |
|
* Updates the row represented by this active record. |
|
* All loaded attributes will be saved to the database. |
|
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation. |
|
* @param array $attributes list of attributes that need to be saved. Defaults to null, |
|
* meaning all attributes that are loaded from DB will be saved. |
|
* @return boolean whether the update is successful |
|
* @throws Exception if the record is new |
|
*/ |
|
public function update($attributes = null) |
|
{ |
|
if ($this->getIsNewRecord()) { |
|
throw new Exception('The active record cannot be updated because it is new.'); |
|
} |
|
if ($this->beforeUpdate()) { |
|
$values = $this->getChangedAttributes($attributes); |
|
if ($values !== array()) { |
|
$this->updateAll($values, $this->getOldPrimaryKey(true)); |
|
foreach ($values as $name => $value) { |
|
$this->_oldAttributes[$name] = $this->_attributes[$name]; |
|
} |
|
$this->afterUpdate(); |
|
} |
|
return true; |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
/** |
|
* Saves 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)->one(); |
|
* $post->updateCounters(array('view_count' => 1)); |
|
* ~~~ |
|
* |
|
* Use negative values if you want to decrease the counters. |
|
* @param array $counters the counters to be updated (attribute name => increment value) |
|
* @return boolean whether the saving is successful |
|
* @throws Exception if the record is new or any database error |
|
* @see updateAllCounters() |
|
*/ |
|
public function updateCounters($counters) |
|
{ |
|
if ($this->getIsNewRecord()) { |
|
throw new Exception('The active record cannot be updated because it is new.'); |
|
} |
|
$this->updateAllCounters($counters, $this->getOldPrimaryKey(true)); |
|
foreach ($counters as $name => $value) { |
|
$this->_attributes[$name] += $value; |
|
$this->_oldAttributes[$name] = $this->_attributes[$name]; |
|
} |
|
return true; |
|
} |
|
|
|
/** |
|
* Deletes the row corresponding to this active record. |
|
* @return boolean whether the deletion is successful. |
|
* @throws Exception if the record is new or any database error |
|
*/ |
|
public function delete() |
|
{ |
|
if ($this->getIsNewRecord()) { |
|
throw new Exception('The active record cannot be deleted because it is new.'); |
|
} |
|
if ($this->beforeDelete()) { |
|
$result = $this->deleteAll($this->getPrimaryKey(true)) > 0; |
|
$this->_oldAttributes = null; |
|
$this->afterDelete(); |
|
return $result; |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
/** |
|
* Returns if the current record is new. |
|
* @return boolean whether the record is new and should be inserted when calling {@link save}. |
|
* This property is automatically set in constructor and {@link populateRecord}. |
|
* Defaults to false, but it will be set to true if the instance is created using |
|
* the new operator. |
|
*/ |
|
public function getIsNewRecord() |
|
{ |
|
return $this->_oldAttributes === null; |
|
} |
|
|
|
/** |
|
* Sets if the record is new. |
|
* @param boolean $value whether the record is new and should be inserted when calling {@link save}. |
|
* @see getIsNewRecord |
|
*/ |
|
public function setIsNewRecord($value) |
|
{ |
|
$this->_oldAttributes = $value ? null : $this->_attributes; |
|
} |
|
|
|
/** |
|
* This method is invoked before saving a record (after validation, if any). |
|
* The default implementation raises the `beforeSave` event. |
|
* You may override this method to do any preparation work for record saving. |
|
* Use {@link isNewRecord} to determine whether the saving is |
|
* for inserting or updating record. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
* @return boolean whether the saving should be executed. Defaults to true. |
|
*/ |
|
public function beforeInsert() |
|
{ |
|
$event = new ModelEvent($this); |
|
$this->trigger('beforeInsert', $event); |
|
return $event->isValid; |
|
} |
|
|
|
/** |
|
* This method is invoked after saving a record successfully. |
|
* The default implementation raises the `afterSave` event. |
|
* You may override this method to do postprocessing after record saving. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
*/ |
|
public function afterInsert() |
|
{ |
|
$this->trigger('afterInsert', new Event($this)); |
|
} |
|
|
|
/** |
|
* This method is invoked before saving a record (after validation, if any). |
|
* The default implementation raises the `beforeSave` event. |
|
* You may override this method to do any preparation work for record saving. |
|
* Use {@link isNewRecord} to determine whether the saving is |
|
* for inserting or updating record. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
* @return boolean whether the saving should be executed. Defaults to true. |
|
*/ |
|
public function beforeUpdate() |
|
{ |
|
$event = new ModelEvent($this); |
|
$this->trigger('beforeUpdate', $event); |
|
return $event->isValid; |
|
} |
|
|
|
/** |
|
* This method is invoked after saving a record successfully. |
|
* The default implementation raises the `afterSave` event. |
|
* You may override this method to do postprocessing after record saving. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
*/ |
|
public function afterUpdate() |
|
{ |
|
$this->trigger('afterUpdate', new Event($this)); |
|
} |
|
|
|
/** |
|
* This method is invoked before deleting a record. |
|
* The default implementation raises the `beforeDelete` event. |
|
* You may override this method to do any preparation work for record deletion. |
|
* Make sure you call the parent implementation so that the event is raised properly. |
|
* @return boolean whether the record should be deleted. Defaults to true. |
|
*/ |
|
public function beforeDelete() |
|
{ |
|
$event = new ModelEvent($this); |
|
$this->trigger('beforeDelete', $event); |
|
return $event->isValid; |
|
} |
|
|
|
/** |
|
* This method is invoked after deleting a record. |
|
* The default implementation raises the `afterDelete` 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() |
|
{ |
|
$this->trigger('afterDelete', new Event($this)); |
|
} |
|
|
|
/** |
|
* 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) |
|
{ |
|
if ($this->getIsNewRecord()) { |
|
return false; |
|
} |
|
$record = $this->find()->where($this->getPrimaryKey(true))->one(); |
|
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; |
|
} |
|
|
|
/** |
|
* Compares current active record with another one. |
|
* The comparison is made by comparing table name and the primary key values of the two active records. |
|
* @param ActiveRecord $record record to compare to |
|
* @return boolean whether the two active records refer to the same row in the database table. |
|
*/ |
|
public function equals($record) |
|
{ |
|
return $this->tableName() === $record->tableName() && $this->getPrimaryKey() === $record->getPrimaryKey(); |
|
} |
|
|
|
/** |
|
* Returns the primary key value. |
|
* @param boolean $asArray whether to return the primary key value as an array. If true, |
|
* the return value will be an array with column name as key and column value as value. |
|
* @return mixed the primary key value. An array (column name=>column value) is returned if the primary key is composite. |
|
* If primary key is not defined, null will be returned. |
|
*/ |
|
public function getPrimaryKey($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. |
|
* 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 $asArray whether to return the primary key value as an array. If true, |
|
* the return value will be an array with column name as key and column value as value. |
|
* If this is false (default), a scalar value will be returned for non-composite primary key. |
|
* @return string|array the old primary key value. An array (column name=>column value) is returned if the primary key is composite. |
|
* If primary key is not defined, null will be returned. |
|
*/ |
|
public function getOldPrimaryKey($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 with the given attributes. |
|
* @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; |
|
return $record; |
|
} |
|
|
|
/** |
|
* Creates an active record instance. |
|
* This method is called by [[createRecord()]]. |
|
* You may override this method if the instance being created |
|
* depends the attributes that are to be populated to 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 $row list of attribute values for the active records. |
|
* @return ActiveRecord the active record |
|
*/ |
|
public static function instantiate($row) |
|
{ |
|
return new static; |
|
} |
|
|
|
/** |
|
* Returns whether there is an element at the specified offset. |
|
* This method is required by the interface ArrayAccess. |
|
* @param mixed $offset the offset to check on |
|
* @return boolean |
|
*/ |
|
public function offsetExists($offset) |
|
{ |
|
return $this->__isset($offset); |
|
} |
|
|
|
|
|
}
|
|
|