<?php
/**
* ActiveRecord class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\ar;
use yii\db\Exception;
use yii\db\dao\Connection;
use yii\db\dao\TableSchema;
use yii\db\dao\Query;
/**
* ActiveRecord is the base class for classes representing relational data.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*
* @property array $attributes
*/
abstract class ActiveRecord extends \yii\base\Model
{
/**
* @var
*/
private static $_md;
private $_new = false; // whether this instance is new or not
private $_attributes = array(); // attribute name => attribute value
private $_oldAttributes;
private $_related = array(); // attribute name => related objects
private $_pk; // old primary key value
/**
* Returns the metadata for this AR class.
* @param boolean $refresh whether to rebuild the metadata.
* @return ActiveMetaData the meta for this AR class.
*/
public static function getMetaData($refresh = false)
{
$class = get_called_class();
if (!$refresh && isset(self::$_md[$class])) {
return self::$_md[$class];
} else {
return self::$_md[$class] = new ActiveMetaData('\\' . $class);
}
}
/**
* @static
* @param string|array|ActiveQuery $q
* @return ActiveQuery
* @throws \yii\db\Exception
*/
public static function find($q = null)
{
$query = $q instanceof ActiveQuery? $q : static::createQuery();
$query->modelClass = '\\' . get_called_class();
$query->from = static::tableName();
if (is_array($q)) {
$query->where($q);
} elseif ($q !== null && $query !== $q) {
$primaryKey = static::getMetaData()->table->primaryKey;
if (is_string($primaryKey)) {
$query->where(array($primaryKey => $q));
} else {
throw new Exception("Multiple column values are required to find by composite primary keys.");
}
}
return $query;
}
public static function findBySql($sql, $params = array())
{
$query = static::createQuery();
if (!is_array($params)) {
$params = func_get_args();
array_shift($params);
}
$query->setSql($sql);
$query->modelClass = '\\' . get_called_class();
return $query->params($params);
}
public static function exists($condition, $params)
{
}
public static function updateAll()
{
}
public static function updateCounters()
{
}
public static function deleteAll()
{
}
public static function createQuery()
{
return new ActiveQuery('\\' . get_called_class());
}
/**
* Returns the database connection used by active record.
* By default, the "db" application component is used as the database connection.
* You may override this method if you want to use a different database connection.
* @return Connection the database connection used by active record.
*/
public static function getDbConnection()
{
return \Yii::$application->getDb();
}
/**
* Returns the default named scope that should be implicitly applied to all queries for this model.
* Note, default scope only applies to SELECT queries. It is ignored for INSERT, UPDATE and DELETE queries.
* The default implementation simply returns an empty array. You may override this method
* if the model needs to be queried with some default criteria (e.g. only active records should be returned).
* @return array the query criteria. This will be used as the parameter to the constructor
* of {@link CDbCriteria}.
*/
public static function defaultScope()
{
return array();
}
/**
* Returns the name of the associated database table.
* By default this method returns the class name as the table name.
* You may override this method if the table is not named after this convention.
* @return string the table name
*/
public static function tableName()
{
return basename(get_called_class());
}
/**
* Returns the primary key of the associated database table.
* This method is meant to be overridden in case when the table is not defined with a primary key
* (for some legacy database). If the table is already defined with a primary key,
* you do not need to override this method. The default implementation simply returns null,
* meaning using the primary key defined in the database.
* @return mixed the primary key of the associated database table.
* If the key is a single column, it should return the column name;
* If the key is a composite one consisting of several columns, it should
* return the array of the key column names.
*/
public static function primaryKey()
{
}
/**
* Declares the relations for this ActiveRecord class.
*
* Child classes may want to override this method to specify their relations.
*
* The following shows how to declare relations for a Programmer AR class:
*
* ~~~
* return array(
* 'manager:Manager' => '?.manager_id = manager.id',
* 'assignments:Assignment[]' => array(
* 'on' => '?.id = assignments.owner_id AND assignments.status=1',
* 'orderBy' => 'assignments.create_time DESC',
* ),
* 'projects:Project[]' => array(
* 'via' => 'assignments',
* 'on' => 'projects.id = assignments.project_id',
* ),
* );
* ~~~
*
* This method should be overridden to declare related objects.
*
* There are four types of relations that may exist between two active record objects:
* <ul>
* <li>BELONGS_TO: e.g. a member belongs to a team;</li>
* <li>HAS_ONE: e.g. a member has at most one profile;</li>
* <li>HAS_MANY: e.g. a team has many members;</li>
* <li>MANY_MANY: e.g. a member has many skills and a skill belongs to a member.</li>
* </ul>
*
* Besides the above relation types, a special relation called STAT is also supported
* that can be used to perform statistical query (or aggregational query).
* It retrieves the aggregational information about the related objects, such as the number
* of comments for each post, the average rating for each product, etc.
*
* Each kind of related objects is defined in this method as an array with the following elements:
* <pre>
* 'varName'=>array('relationType', 'className', 'foreign_key', ...additional options)
* </pre>
* where 'varName' refers to the name of the variable/property that the related object(s) can
* be accessed through; 'relationType' refers to the type of the relation, which can be one of the
* following four constants: self::BELONGS_TO, self::HAS_ONE, self::HAS_MANY and self::MANY_MANY;
* 'className' refers to the name of the active record class that the related object(s) is of;
* and 'foreign_key' states the foreign key that relates the two kinds of active record.
* Note, for composite foreign keys, they must be listed together, separated by commas;
* and for foreign keys used in MANY_MANY relation, the joining table must be declared as well
* (e.g. 'join_table(fk1, fk2)').
*
* Additional options may be specified as name-value pairs in the rest array elements:
* <ul>
* <li>'select': string|array, a list of columns to be selected. Defaults to '*', meaning all columns.
* Column names should be disambiguated if they appear in an expression (e.g. COUNT(relationName.name) AS name_count).</li>
* <li>'condition': string, the WHERE clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age>20)</li>
* <li>'order': string, the ORDER BY clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age DESC)</li>
* <li>'with': string|array, a list of child related objects that should be loaded together with this object.
* Note, this is only honored by lazy loading, not eager loading.</li>
* <li>'joinType': type of join. Defaults to 'LEFT OUTER JOIN'.</li>
* <li>'alias': the alias for the table associated with this relationship.
* This option has been available since version 1.0.1. It defaults to null,
* meaning the table alias is the same as the relation name.</li>
* <li>'params': the parameters to be bound to the generated SQL statement.
* This should be given as an array of name-value pairs. This option has been
* available since version 1.0.3.</li>
* <li>'on': the ON clause. The condition specified here will be appended
* to the joining condition using the AND operator. This option has been
* available since version 1.0.2.</li>
* <li>'index': the name of the column whose values should be used as keys
* of the array that stores related objects. This option is only available to
* HAS_MANY and MANY_MANY relations. This option has been available since version 1.0.7.</li>
* <li>'scopes': scopes to apply. In case of a single scope can be used like 'scopes'=>'scopeName',
* in case of multiple scopes can be used like 'scopes'=>array('scopeName1','scopeName2').
* This option has been available since version 1.1.9.</li>
* </ul>
*
* The following options are available for certain relations when lazy loading:
* <ul>
* <li>'group': string, the GROUP BY clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age). This option only applies to HAS_MANY and MANY_MANY relations.</li>
* <li>'having': string, the HAVING clause. Defaults to empty. Note, column references need to
* be disambiguated with prefix 'relationName.' (e.g. relationName.age). This option only applies to HAS_MANY and MANY_MANY relations.</li>
* <li>'limit': limit of the rows to be selected. This option does not apply to BELONGS_TO relation.</li>
* <li>'offset': offset of the rows to be selected. This option does not apply to BELONGS_TO relation.</li>
* <li>'through': name of the model's relation that will be used as a bridge when getting related data. Can be set only for HAS_ONE and HAS_MANY. This option has been available since version 1.1.7.</li>
* </ul>
*
* Below is an example declaring related objects for 'Post' active record class:
* <pre>
* return array(
* 'author'=>array(self::BELONGS_TO, 'User', 'author_id'),
* 'comments'=>array(self::HAS_MANY, 'Comment', 'post_id', 'with'=>'author', 'order'=>'create_time DESC'),
* 'tags'=>array(self::MANY_MANY, 'Tag', 'post_tag(post_id, tag_id)', 'order'=>'name'),
* );
* </pre>
*
* @return array list of related object declarations. Defaults to empty array.
*/
public static function relations()
{
return array();
}
/**
* Returns the declaration of named scopes.
* A named scope represents a query criteria that can be chained together with
* other named scopes and applied to a query. This method should be overridden
* by child classes to declare named scopes for the particular AR classes.
* For example, the following code declares two named scopes: 'recently' and
* 'published'.
* <pre>
* return array(
* 'published'=>array(
* 'condition'=>'status=1',
* ),
* 'recently'=>array(
* 'order'=>'create_time DESC',
* 'limit'=>5,
* ),
* );
* </pre>
* If the above scopes are declared in a 'Post' model, we can perform the following
* queries:
* <pre>
* $posts=Post::model()->published()->findAll();
* $posts=Post::model()->published()->recently()->findAll();
* $posts=Post::model()->published()->with('comments')->findAll();
* </pre>
* Note that the last query is a relational query.
*
* @return array the scope definition. The array keys are scope names; the array
* values are the corresponding scope definitions. Each scope definition is represented
* as an array whose keys must be properties of {@link CDbCriteria}.
*/
public static function scopes()
{
return array();
}
/**
* Constructor.
* @param string $scenario scenario name. See {@link CModel::scenario} for more details about this parameter.
*/
public function __construct($scenario = 'insert')
{
if ($scenario === null) // internally used by populateRecord() and model()
{
return;
}
$this->setScenario($scenario);
$this->setIsNewRecord(true);
}
/**
* PHP sleep magic method.
* This method ensures that the model meta data reference is set to null.
* @return array
*/
public function __sleep()
{
return array_keys((array)$this);
}
/**
* PHP getter magic method.
* This method is overridden so that AR attributes can be accessed like properties.
* @param string $name property name
* @return mixed property value
* @see getAttribute
*/
public function __get($name)
{
if (isset($this->_attributes[$name])) {
return $this->_attributes[$name];
} elseif (isset($this->getMetaData()->table->columns[$name])) {
return null;
} elseif (isset($this->_related[$name])) {
return $this->_related[$name];
} elseif (isset($this->getMetaData()->relations[$name])) {
return $this->getRelatedRecord($name);
} else {
return parent::__get($name);
}
}
/**
* PHP setter magic method.
* This method is overridden so that AR attributes can be accessed like properties.
* @param string $name property name
* @param mixed $value property value
*/
public function __set($name, $value)
{
if (isset($this->getMetaData()->table->columns[$name])) {
$this->_attributes[$name] = $value;
} elseif (isset($this->getMetaData()->relations[$name])) {
$this->_related[$name] = $value;
} else {
parent::__set($name, $value);
}
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking
* if the named attribute is null or not.
* @param string $name the property name or the event name
* @return boolean whether the property value is null
*/
public function __isset($name)
{
if (isset($this->_attributes[$name])) {
return true;
}
elseif (isset($this->getMetaData()->columns[$name]))
{
return false;
}
elseif (isset($this->_related[$name]))
{
return true;
}
elseif (isset($this->getMetaData()->relations[$name]))
{
return $this->getRelatedRecord($name) !== null;
}
else
{
return parent::__isset($name);
}
}
/**
* Sets a component property to be null.
* This method overrides the parent implementation by clearing
* the specified attribute value.
* @param string $name the property name or the event name
*/
public function __unset($name)
{
if (isset($this->getMetaData()->columns[$name])) {
unset($this->_attributes[$name]);
}
elseif (isset($this->getMetaData()->relations[$name]))
{
unset($this->_related[$name]);
}
else
{
parent::__unset($name);
}
}
/**
* Calls the named method which is not a class method.
* Do not call this method. This is a PHP magic method that we override
* to implement the named scope feature.
* @param string $name the method name
* @param array $parameters method parameters
* @return mixed the method return value
*/
public function __call($name, $parameters)
{
if (isset($this->getMetaData()->relations[$name])) {
if (empty($parameters)) {
return $this->getRelatedRecord($name, false);
}
else
{
return $this->getRelatedRecord($name, false, $parameters[0]);
}
}
$scopes = $this->scopes();
if (isset($scopes[$name])) {
$this->getDbCriteria()->mergeWith($scopes[$name]);
return $this;
}
return parent::__call($name, $parameters);
}
/**
* Returns the related record(s).
* This method will return the related record(s) of the current record.
* If the relation is HAS_ONE or BELONGS_TO, it will return a single object
* or null if the object does not exist.
* If the relation is HAS_MANY or MANY_MANY, it will return an array of objects
* or an empty array.
* @param string $name the relation name (see {@link relations})
* @param boolean $refresh whether to reload the related objects from database. Defaults to false.
* @param array $params additional parameters that customize the query conditions as specified in the relation declaration.
* This parameter has been available since version 1.0.5.
* @return mixed the related object(s).
* @throws Exception if the relation is not specified in {@link relations}.
*/
public function getRelatedRecord($name, $refresh = false, $params = array())
{
if (!$refresh && $params === array() && (isset($this->_related[$name]) || array_key_exists($name, $this->_related))) {
return $this->_related[$name];
}
$md = $this->getMetaData();
if (!isset($md->relations[$name])) {
throw new Exception(Yii::t('yii', '{class} does not have relation "{name}".',
array('{class}' => get_class($this), '{name}' => $name)));
}
Yii::trace('lazy loading ' . get_class($this) . '.' . $name, 'system.db.ar.ActiveRecord');
$relation = $md->relations[$name];
if ($this->getIsNewRecord() && !$refresh && ($relation instanceof CHasOneRelation || $relation instanceof CHasManyRelation)) {
return $relation instanceof CHasOneRelation ? null : array();
}
if ($params !== array()) // dynamic query
{
$exists = isset($this->_related[$name]) || array_key_exists($name, $this->_related);
if ($exists) {
$save = $this->_related[$name];
}
$r = array($name => $params);
} else
{
$r = $name;
}
unset($this->_related[$name]);
$finder = new CActiveFinder($this, $r);
$finder->lazyFind($this);
if (!isset($this->_related[$name])) {
if ($relation instanceof CHasManyRelation) {
$this->_related[$name] = array();
}
elseif ($relation instanceof CStatRelation)
{
$this->_related[$name] = $relation->defaultValue;
}
else
{
$this->_related[$name] = null;
}
}
if ($params !== array()) {
$results = $this->_related[$name];
if ($exists) {
$this->_related[$name] = $save;
}
else
{
unset($this->_related[$name]);
}
return $results;
} else
{
return $this->_related[$name];
}
}
/**
* Returns a value indicating whether the named related object(s) has been loaded.
* @param string $name the relation name
* @return boolean a value indicating whether the named related object(s) has been loaded.
*/
public function hasRelated($name)
{
return isset($this->_related[$name]) || array_key_exists($name, $this->_related);
}
/**
* Returns the list of all attribute names of the model.
* This would return all column names of the table associated with this AR class.
* @return array list of attribute names.
*/
public function attributeNames()
{
return array_keys($this->getMetaData()->columns);
}
/**
* Returns the text label for the specified attribute.
* This method overrides the parent implementation by supporting
* returning the label defined in relational object.
* In particular, if the attribute name is in the form of "post.author.name",
* then this method will derive the label from the "author" relation's "name" attribute.
* @param string $attribute the attribute name
* @return string the attribute label
* @see generateAttributeLabel
*/
public function getAttributeLabel($attribute)
{
$labels = $this->attributeLabels();
if (isset($labels[$attribute])) {
return $labels[$attribute];
} elseif (strpos($attribute, '.') !== false) {
$segs = explode('.', $attribute);
$name = array_pop($segs);
$model = $this;
foreach ($segs as $seg) {
$relations = $model->getMetaData()->relations;
if (isset($relations[$seg])) {
$model = ActiveRecord::model($relations[$seg]->className);
} else {
break;
}
}
return $model->getAttributeLabel($name);
} else {
return $this->generateAttributeLabel($attribute);
}
}
/**
* Returns the named relation declared for this AR class.
* @param string $name the relation name
* @return CActiveRelation the named relation declared for this AR class. Null if the relation does not exist.
*/
public function getActiveRelation($name)
{
return isset($this->getMetaData()->relations[$name]) ? $this->getMetaData()->relations[$name] : null;
}
/**
* Returns the metadata of the table that this AR belongs to
* @return CDbTableSchema the metadata of the table that this AR belongs to
*/
public function getTableSchema()
{
return $this->getMetaData()->tableSchema;
}
/**
* Checks whether this AR has the named attribute
* @param string $name attribute name
* @return boolean whether this AR has the named attribute (table column).
*/
public function hasAttribute($name)
{
return isset($this->getMetaData()->columns[$name]);
}
/**
* Returns the named attribute value.
* If this is a new record and the attribute is not set before,
* the default column value will be returned.
* If this record is the result of a query and the attribute is not loaded,
* null will be returned.
* You may also use $this->AttributeName to obtain the attribute value.
* @param string $name the attribute name
* @return mixed the attribute value. Null if the attribute is not set or does not exist.
* @see hasAttribute
*/
public function getAttribute($name)
{
if (property_exists($this, $name)) {
return $this->$name;
}
elseif (isset($this->_attributes[$name]))
{
return $this->_attributes[$name];
}
}
/**
* Sets the named attribute value.
* You may also use $this->AttributeName to set the attribute value.
* @param string $name the attribute name
* @param mixed $value the attribute value.
* @return boolean whether the attribute exists and the assignment is conducted successfully
* @see hasAttribute
*/
public function setAttribute($name, $value)
{
if (property_exists($this, $name)) {
$this->$name = $value;
}
elseif (isset($this->getMetaData()->table->columns[$name]))
{
$this->_attributes[$name] = $value;
}
else
{
return false;
}
return true;
}
/**
* Returns all column attribute values.
* Note, related objects are not returned.
* @param mixed $names names of attributes whose value needs to be returned.
* If this is true (default), then all attribute values will be returned, including
* those that are not loaded from DB (null will be returned for those attributes).
* If this is null, all attributes except those that are not loaded from DB will be returned.
* @return array attribute values indexed by attribute names.
*/
public function getAttributes($names = true)
{
$attributes = $this->_attributes;
foreach ($this->getMetaData()->columns as $name => $column)
{
if (property_exists($this, $name)) {
$attributes[$name] = $this->$name;
}
elseif ($names === true && !isset($attributes[$name]))
{
$attributes[$name] = null;
}
}
if (is_array($names)) {
$attrs = array();
foreach ($names as $name)
{
if (property_exists($this, $name)) {
$attrs[$name] = $this->$name;
}
else
{
$attrs[$name] = isset($attributes[$name]) ? $attributes[$name] : null;
}
}
return $attrs;
} else
{
return $attributes;
}
}
/**
* Saves the current record.
*
* 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'
* operator). Otherwise, it will be used to update the corresponding row in the table
* (usually the case if the record is obtained using one of those 'find' methods.)
*
* Validation will be performed before saving the record. If the validation fails,
* the record will not be saved. You can call {@link getErrors()} to retrieve the
* validation errors.
*
* If the record is saved via insertion, its {@link isNewRecord} property will be
* set false, and its {@link scenario} property will be set to be 'update'.
* And if its primary key is auto-incremental and is not set before insertion,
* the primary key will be populated with the automatically generated key value.
*
* @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, $attributes = null)
{
if (!$runValidation || $this->validate($attributes)) {
return $this->getIsNewRecord() ? $this->insert($attributes) : $this->update($attributes);
}
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->_new;
}
/**
* 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->_new = $value;
}
/**
* This event is raised before the record is saved.
* By setting {@link CModelEvent::isValid} to be false, the normal {@link save()} process will be stopped.
* @param CModelEvent $event the event parameter
*/
public function onBeforeSave($event)
{
$this->raiseEvent('onBeforeSave', $event);
}
/**
* This event is raised after the record is saved.
* @param CEvent $event the event parameter
*/
public function onAfterSave($event)
{
$this->raiseEvent('onAfterSave', $event);
}
/**
* This event is raised before the record is deleted.
* By setting {@link CModelEvent::isValid} to be false, the normal {@link delete()} process will be stopped.
* @param CModelEvent $event the event parameter
*/
public function onBeforeDelete($event)
{
$this->raiseEvent('onBeforeDelete', $event);
}
/**
* This event is raised after the record is deleted.
* @param CEvent $event the event parameter
*/
public function onAfterDelete($event)
{
$this->raiseEvent('onAfterDelete', $event);
}
/**
* This method is invoked before saving a record (after validation, if any).
* The default implementation raises the {@link onBeforeSave} event.
* You may override this method to do any preparation work for record saving.
* Use {@link isNewRecord} to determine whether the saving is
* for inserting or updating record.
* Make sure you call the parent implementation so that the event is raised properly.
* @return boolean whether the saving should be executed. Defaults to true.
*/
protected function beforeSave()
{
if ($this->hasEventHandler('onBeforeSave')) {
$event = new CModelEvent($this);
$this->onBeforeSave($event);
return $event->isValid;
} else
{
return true;
}
}
/**
* This method is invoked after saving a record successfully.
* The default implementation raises the {@link onAfterSave} event.
* You may override this method to do postprocessing after record saving.
* Make sure you call the parent implementation so that the event is raised properly.
*/
protected function afterSave()
{
if ($this->hasEventHandler('onAfterSave')) {
$this->onAfterSave(new CEvent($this));
}
}
/**
* This method is invoked before deleting a record.
* The default implementation raises the {@link onBeforeDelete} 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.
*/
protected function beforeDelete()
{
if ($this->hasEventHandler('onBeforeDelete')) {
$event = new CModelEvent($this);
$this->onBeforeDelete($event);
return $event->isValid;
} else
{
return true;
}
}
/**
* This method is invoked after deleting a record.
* The default implementation raises the {@link onAfterDelete} event.
* You may override this method to do postprocessing after the record is deleted.
* Make sure you call the parent implementation so that the event is raised properly.
*/
protected function afterDelete()
{
if ($this->hasEventHandler('onAfterDelete')) {
$this->onAfterDelete(new CEvent($this));
}
}
/**
* This method is invoked before an AR finder executes a find call.
* The find calls include {@link find}, {@link findAll}, {@link findByPk},
* {@link findAllByPk}, {@link findByAttributes} and {@link findAllByAttributes}.
* The default implementation raises the {@link onBeforeFind} event.
* If you override this method, make sure you call the parent implementation
* so that the event is raised properly.
*
* Starting from version 1.1.5, this method may be called with a hidden {@link CDbCriteria}
* parameter which represents the current query criteria as passed to a find method of AR.
*/
protected function beforeFind()
{
if ($this->hasEventHandler('onBeforeFind')) {
$event = new CModelEvent($this);
// for backward compatibility
$event->criteria = func_num_args() > 0 ? func_get_arg(0) : null;
$this->onBeforeFind($event);
}
}
/**
* This method is invoked after each record is instantiated by a find method.
* The default implementation raises the {@link onAfterFind} event.
* You may override this method to do postprocessing after each newly found record is instantiated.
* Make sure you call the parent implementation so that the event is raised properly.
*/
protected function afterFind()
{
if ($this->hasEventHandler('onAfterFind')) {
$this->onAfterFind(new CEvent($this));
}
}
/**
* 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 $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the attributes are valid and the record is inserted successfully.
* @throws CException if the record is not new
*/
public function insert($attributes = null)
{
if (!$this->getIsNewRecord()) {
throw new Exception(Yii::t('yii', 'The active record cannot be inserted to database because it is not new.'));
}
if ($this->beforeSave()) {
Yii::trace(get_class($this) . '.insert()', 'system.db.ar.ActiveRecord');
$builder = $this->getCommandBuilder();
$table = $this->getMetaData()->tableSchema;
$command = $builder->createInsertCommand($table, $this->getAttributes($attributes));
if ($command->execute()) {
$primaryKey = $table->primaryKey;
if ($table->sequenceName !== null) {
if (is_string($primaryKey) && $this->$primaryKey === null) {
$this->$primaryKey = $builder->getLastInsertID($table);
}
elseif (is_array($primaryKey))
{
foreach ($primaryKey as $pk)
{
if ($this->$pk === null) {
$this->$pk = $builder->getLastInsertID($table);
break;
}
}
}
}
$this->_pk = $this->getPrimaryKey();
$this->afterSave();
$this->setIsNewRecord(false);
$this->setScenario('update');
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 $attributes list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the update is successful
* @throws CException if the record is new
*/
public function update($attributes = null)
{
if ($this->getIsNewRecord()) {
throw new Exception(Yii::t('yii', 'The active record cannot be updated because it is new.'));
}
if ($this->beforeSave()) {
Yii::trace(get_class($this) . '.update()', 'system.db.ar.ActiveRecord');
if ($this->_pk === null) {
$this->_pk = $this->getPrimaryKey();
}
$this->updateByPk($this->getOldPrimaryKey(), $this->getAttributes($attributes));
$this->_pk = $this->getPrimaryKey();
$this->afterSave();
return true;
} else
{
return false;
}
}
/**
* Saves a selected list of attributes.
* Unlike {@link save}, this method only saves the specified attributes
* of an existing row dataset and does NOT call either {@link beforeSave} or {@link afterSave}.
* Also note that this method does neither attribute filtering nor validation.
* So do not use this method with untrusted data (such as user posted data).
* You may consider the following alternative if you want to do so:
* <pre>
* $postRecord=Post::model()->findByPk($postID);
* $postRecord->attributes=$_POST['post'];
* $postRecord->save();
* </pre>
* @param array $attributes attributes to be updated. Each element represents an attribute name
* or an attribute value indexed by its name. If the latter, the record's
* attribute will be changed accordingly before saving.
* @return boolean whether the update is successful
* @throws CException if the record is new or any database error
*/
public function saveAttributes($attributes)
{
if (!$this->getIsNewRecord()) {
Yii::trace(get_class($this) . '.saveAttributes()', 'system.db.ar.ActiveRecord');
$values = array();
foreach ($attributes as $name => $value)
{
if (is_integer($name)) {
$values[$value] = $this->$value;
}
else
{
$values[$name] = $this->$name = $value;
}
}
if ($this->_pk === null) {
$this->_pk = $this->getPrimaryKey();
}
if ($this->updateByPk($this->getOldPrimaryKey(), $values) > 0) {
$this->_pk = $this->getPrimaryKey();
return true;
} else
{
return false;
}
} else
{
throw new Exception(Yii::t('yii', 'The active record cannot be updated because it is new.'));
}
}
/**
* Saves one or several counter columns for the current AR object.
* Note that this method differs from {@link updateCounters} in that it only
* saves the current AR object.
* An example usage is as follows:
* <pre>
* $postRecord=Post::model()->findByPk($postID);
* $postRecord->saveCounters(array('view_count'=>1));
* </pre>
* Use negative values if you want to decrease the counters.
* @param array $counters the counters to be updated (column name=>increment value)
* @return boolean whether the saving is successful
* @see updateCounters
*/
public function saveCounters($counters)
{
Yii::trace(get_class($this) . '.saveCounters()', 'system.db.ar.ActiveRecord');
$builder = $this->getCommandBuilder();
$table = $this->getTableSchema();
$criteria = $builder->createPkCriteria($table, $this->getOldPrimaryKey());
$command = $builder->createUpdateCounterCommand($this->getTableSchema(), $counters, $criteria);
if ($command->execute()) {
foreach ($counters as $name => $value)
{
$this->$name = $this->$name + $value;
}
return true;
} else
{
return false;
}
}
/**
* Deletes the row corresponding to this active record.
* @return boolean whether the deletion is successful.
* @throws CException if the record is new
*/
public function delete()
{
if (!$this->getIsNewRecord()) {
Yii::trace(get_class($this) . '.delete()', 'system.db.ar.ActiveRecord');
if ($this->beforeDelete()) {
$result = $this->deleteByPk($this->getPrimaryKey()) > 0;
$this->afterDelete();
return $result;
} else
{
return false;
}
} else
{
throw new Exception(Yii::t('yii', 'The active record cannot be deleted because it is new.'));
}
}
/**
* Repopulates this active record with the latest data.
* @return boolean whether the row still exists in the database. If true, the latest data will be populated to this active record.
*/
public function refresh()
{
Yii::trace(get_class($this) . '.refresh()', 'system.db.ar.ActiveRecord');
if (!$this->getIsNewRecord() && ($record = $this->findByPk($this->getPrimaryKey())) !== null) {
$this->_attributes = array();
$this->_related = array();
foreach ($this->getMetaData()->columns as $name => $column)
{
if (property_exists($this, $name)) {
$this->$name = $record->$name;
}
else
{
$this->_attributes[$name] = $record->$name;
}
}
return true;
} else
{
return false;
}
}
/**
* 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.
* @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()
{
$table = static::getMetaData()->table;
if (is_string($table->primaryKey)) {
return $this->{$table->primaryKey};
}
elseif (is_array($table->primaryKey))
{
$values = array();
foreach ($table->primaryKey as $name)
{
$values[$name] = $this->$name;
}
return $values;
} else
{
return null;
}
}
/**
* Sets the primary key value.
* After calling this method, the old primary key value can be obtained from {@link oldPrimaryKey}.
* @param mixed $value the new primary key value. If the primary key is composite, the new value
* should be provided as an array (column name=>column value).
*/
public function setPrimaryKey($value)
{
$this->_pk = $this->getPrimaryKey();
$table = $this->getMetaData()->tableSchema;
if (is_string($table->primaryKey)) {
$this->{$table->primaryKey} = $value;
}
elseif (is_array($table->primaryKey))
{
foreach ($table->primaryKey as $name)
{
$this->$name = $value[$name];
}
}
}
/**
* 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.
* @return mixed 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()
{
return $this->_pk;
}
/**
* Sets the old primary key value.
* @param mixed $value the old primary key value.
*/
public function setOldPrimaryKey($value)
{
$this->_pk = $value;
}
/**
* Creates an active record with the given attributes.
* This method is internally used by the find methods.
*
* @param array $row attribute values (column name=>column value)
*
* @return ActiveRecord the newly created active record. The class of the object is the same as the model class.
* Null is returned if the input data is false.
*/
public static function populateRecord($row)
{
$record = static::instantiate($row);
$record->setScenario('update');
$columns = static::getMetaData()->table->columns;
foreach ($row as $name => $value) {
if (property_exists($record, $name)) {
$record->$name = $value;
} elseif (isset($columns[$name])) {
$record->_attributes[$name] = $value;
}
}
$record->_pk = $record->getPrimaryKey();
return $record;
}
/**
* Creates an active record instance.
* This method is called by {@link populateRecord} and {@link populateRecords}.
* 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 $row list of attribute values for the active records.
* @return ActiveRecord the active record
*/
protected static function instantiate($row)
{
return static::newInstance();
}
/**
* 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);
}
}