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<?php
/**
* CActiveRecord class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2010 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CActiveRecord is the base class for classes representing relational data.
*
* It implements the active record design pattern, a popular Object-Relational Mapping (ORM) technique.
* Please check {@link http://www.yiiframework.com/doc/guide/database.ar the Guide} for more details
* about this class.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
abstract class CActiveRecord extends CModel
{
const BELONGS_TO='CBelongsToRelation';
const HAS_ONE='CHasOneRelation';
const HAS_MANY='CHasManyRelation';
const MANY_MANY='CManyManyRelation';
const STAT='CStatRelation';
/**
* @var CDbConnection the default database connection for all active record classes.
* By default, this is the 'db' application component.
* @see getDbConnection
*/
public static $db;
private static $_models=array(); // class name => model
private $_md; // meta data
private $_new=false; // whether this instance is new or not
private $_attributes=array(); // attribute name => attribute value
private $_related=array(); // attribute name => related objects
private $_c; // query criteria (used by finder only)
private $_pk; // old primary key value
/**
* Constructor.
* @param string scenario name. See {@link CModel::scenario} for more details about this parameter.
*/
public function __construct($scenario='insert')
{
if($scenario===null) // internally used by populateRecord() and model()
return;
$this->setScenario($scenario);
$this->setIsNewRecord(true);
$this->_attributes=$this->getMetaData()->attributeDefaults;
$this->init();
$this->attachBehaviors($this->behaviors());
$this->afterConstruct();
}
/**
* Initializes this model.
* This method is invoked when an AR instance is newly created and has
* its {@link scenario} set.
* You may override this method to provide code that is needed to initialize the model (e.g. setting
* initial property values.)
* @since 1.0.8
*/
public function init()
{
}
/**
* PHP sleep magic method.
* This method ensures that the model meta data reference is set to null.
*/
public function __sleep()
{
$this->_md=null;
return array_keys((array)$this);
}
/**
* PHP getter magic method.
* This method is overridden so that AR attributes can be accessed like properties.
* @param string property name
* @return mixed property value
* @see getAttribute
*/
public function __get($name)
{
if(isset($this->_attributes[$name]))
return $this->_attributes[$name];
else if(isset($this->getMetaData()->columns[$name]))
return null;
else if(isset($this->_related[$name]))
return $this->_related[$name];
else if(isset($this->getMetaData()->relations[$name]))
return $this->getRelated($name);
else
return parent::__get($name);
}
/**
* PHP setter magic method.
* This method is overridden so that AR attributes can be accessed like properties.
* @param string property name
* @param mixed property value
*/
public function __set($name,$value)
{
if($this->setAttribute($name,$value)===false)
{
if(isset($this->getMetaData()->relations[$name]))
$this->_related[$name]=$value;
else
parent::__set($name,$value);
}
}
/**
* Checks if a property value is null.
* This method overrides the parent implementation by checking
* if the named attribute is null or not.
* @param string the property name or the event name
* @return boolean whether the property value is null
* @since 1.0.1
*/
public function __isset($name)
{
if(isset($this->_attributes[$name]))
return true;
else if(isset($this->getMetaData()->columns[$name]))
return false;
else if(isset($this->_related[$name]))
return true;
else if(isset($this->getMetaData()->relations[$name]))
return $this->getRelated($name)!==null;
else
return parent::__isset($name);
}
/**
* Sets a component property to be null.
* This method overrides the parent implementation by clearing
* the specified attribute value.
* @param string the property name or the event name
* @since 1.0.1
*/
public function __unset($name)
{
if(isset($this->getMetaData()->columns[$name]))
unset($this->_attributes[$name]);
else if(isset($this->getMetaData()->relations[$name]))
unset($this->_related[$name]);
else
parent::__unset($name);
}
/**
* Calls the named method which is not a class method.
* Do not call this method. This is a PHP magic method that we override
* to implement the named scope feature.
* @param string the method name
* @param array method parameters
* @return mixed the method return value
* @since 1.0.5
*/
public function __call($name,$parameters)
{
if(isset($this->getMetaData()->relations[$name]))
{
if(empty($parameters))
return $this->getRelated($name,false);
else
return $this->getRelated($name,false,$parameters[0]);
}
$scopes=$this->scopes();
if(isset($scopes[$name]))
{
$this->getDbCriteria()->mergeWith($scopes[$name]);
return $this;
}
return parent::__call($name,$parameters);
}
/**
* Returns the related record(s).
* This method will return the related record(s) of the current record.
* If the relation is HAS_ONE or BELONGS_TO, it will return a single object
* or null if the object does not exist.
* If the relation is HAS_MANY or MANY_MANY, it will return an array of objects
* or an empty array.
* @param string the relation name (see {@link relations})
* @param boolean whether to reload the related objects from database. Defaults to false.
* @param array additional parameters that customize the query conditions as specified in the relation declaration.
* This parameter has been available since version 1.0.5.
* @return mixed the related object(s).
* @throws CDbException if the relation is not specified in {@link relations}.
* @since 1.0.2
*/
public function getRelated($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 CDbException(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.CActiveRecord');
$relation=$md->relations[$name];
if($this->getIsNewRecord() && ($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[$name];
unset($this->_related[$name]);
$r=array($name=>$params);
}
else
$r=$name;
$finder=new CActiveFinder($this,$r);
$finder->lazyFind($this);
if(!isset($this->_related[$name]))
{
if($relation instanceof CHasManyRelation)
$this->_related[$name]=array();
else if($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 the relation name
* @return booolean a value indicating whether the named related object(s) has been loaded.
* @since 1.0.3
*/
public function hasRelated($name)
{
return isset($this->_related[$name]) || array_key_exists($name,$this->_related);
}
/**
* Returns the query criteria associated with this model.
* @param boolean whether to create a criteria instance if it does not exist. Defaults to true.
* @return CDbCriteria the query criteria that is associated with this model.
* This criteria is mainly used by {@link scopes named scope} feature to accumulate
* different criteria specifications.
* @since 1.0.5
*/
public function getDbCriteria($createIfNull=true)
{
if($this->_c===null)
{
if(($c=$this->defaultScope())!==array() || $createIfNull)
$this->_c=new CDbCriteria($c);
}
return $this->_c;
}
/**
* Returns the default named scope that should be implicitly applied to all queries for this model.
* Note, default scope only applies to SELECT queries. It is ignored for INSERT, UPDATE and DELETE queries.
* The default implementation simply returns an empty array. You may override this method
* if the model needs to be queried with some default criteria (e.g. only active records should be returned).
* @return array the query criteria. This will be used as the parameter to the constructor
* of {@link CDbCriteria}.
* @since 1.0.5
*/
public function defaultScope()
{
return array();
}
/**
* Returns the static model of the specified AR class.
* The model returned is a static instance of the AR class.
* It is provided for invoking class-level methods (something similar to static class methods.)
*
* EVERY derived AR class must override this method as follows,
* <pre>
* public static function model($className=__CLASS__)
* {
* return parent::model($className);
* }
* </pre>
*
* @param string active record class name.
* @return CActiveRecord active record model instance.
*/
public static function model($className=__CLASS__)
{
if(isset(self::$_models[$className]))
return self::$_models[$className];
else
{
$model=self::$_models[$className]=new $className(null);
$model->_md=new CActiveRecordMetaData($model);
$model->attachBehaviors($model->behaviors());
return $model;
}
}
/**
* @return CActiveRecordMetaData the meta for this AR class.
*/
public function getMetaData()
{
if($this->_md!==null)
return $this->_md;
else
return $this->_md=self::model(get_class($this))->_md;
}
/**
* Refreshes the meta data for this AR class.
* By calling this method, this AR class will regenerate the meta data needed.
* This is useful if the table schema has been changed and you want to use the latest
* available table schema. Make sure you have called {@link CDbSchema::refresh}
* before you call this method. Otherwise, old table schema data will still be used.
* @since 1.0.8
*/
public function refreshMetaData()
{
$finder=self::model(get_class($this));
$finder->_md=new CActiveRecordMetaData($finder);
if($this!==$finder)
$this->_md=$finder->_md;
}
/**
* 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 function tableName()
{
return get_class($this);
}
/**
* 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 legency 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.
* @since 1.0.4
*/
public function primaryKey()
{
}
/**
* 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', 'foreignKey', ...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 'foreignKey' states the foreign key that relates the two kinds of active record.
* Note, for composite foreign keys, they must be listed together, separating with space or comma;
* and for foreign keys used in MANY_MANY relation, the joining table must be declared as well
* (e.g. 'joinTable(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&gt;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>
* </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>
* </ul>
*
* Below is an example declaring related objects for 'Post' active record class:
* <pre>
* return array(
* 'author'=>array(self::BELONGS_TO, 'User', 'authorID'),
* 'comments'=>array(self::HAS_MANY, 'Comment', 'postID', 'with'=>'author', 'order'=>'createTime DESC'),
* 'tags'=>array(self::MANY_MANY, 'Tag', 'PostTag(postID, tagID)', 'order'=>'name'),
* );
* </pre>
*
* @return array list of related object declarations. Defaults to empty array.
*/
public 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'=>'createTime 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();
* $posts=Post::model()->published()->with('comments')->findAll();
* </pre>
* Note that the last query is a relational query.
*
* @return array the scope definition. The array keys are scope names; the array
* values are the corresponding scope definitions. Each scope definition is represented
* as an array whose keys must be properties of {@link CDbCriteria}.
* @since 1.0.5
*/
public function scopes()
{
return array();
}
/**
* Returns the list of all attribute names of the model.
* This would return all column names of the table associated with this AR class.
* @return array list of attribute names.
* @since 1.0.1
*/
public function attributeNames()
{
return array_keys($this->getMetaData()->columns);
}
/**
* 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 CDbConnection the database connection used by active record.
*/
public function getDbConnection()
{
if(self::$db!==null)
return self::$db;
else
{
self::$db=Yii::app()->getDb();
if(self::$db instanceof CDbConnection)
{
self::$db->setActive(true);
return self::$db;
}
else
throw new CDbException(Yii::t('yii','Active Record requires a "db" CDbConnection application component.'));
}
}
/**
* @param string 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;
}
/**
* @return CDbTableSchema the metadata of the table that this AR belongs to
*/
public function getTableSchema()
{
return $this->getMetaData()->tableSchema;
}
/**
* @return CDbCommandBuilder the command builder used by this AR
*/
public function getCommandBuilder()
{
return $this->getDbConnection()->getSchema()->getCommandBuilder();
}
/**
* @param string attribute name
* @return boolean whether this AR has the named attribute (table column).
*/
public function hasAttribute($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 $this->AttributeName to obtain the attribute value.
* @param string the attribute name
* @return mixed the attribute value. Null if the attribute is not set or does not exist.
* @see hasAttribute
*/
public function getAttribute($name)
{
if(property_exists($this,$name))
return $this->$name;
else if(isset($this->_attributes[$name]))
return $this->_attributes[$name];
}
/**
* Sets the named attribute value.
* You may also use $this->AttributeName to set the attribute value.
* @param string the attribute name
* @param mixed the attribute value.
* @return boolean whether the attribute exists and the assignment is conducted successfully
* @see hasAttribute
*/
public function setAttribute($name,$value)
{
if(property_exists($this,$name))
$this->$name=$value;
else if(isset($this->getMetaData()->columns[$name]))
$this->_attributes[$name]=$value;
else
return false;
return true;
}
/**
* Adds a related object to this record.
* This method is used internally by {@link CActiveFinder} to populate related objects.
* @param string attribute name
* @param mixed the related record
* @param mixed the index value in the related object collection.
* If true, it means using zero-based integer index.
* If false, it means a HAS_ONE or BELONGS_TO object and no index is needed.
*/
public function addRelatedRecord($name,$record,$index)
{
if($index!==false)
{
if(!isset($this->_related[$name]))
$this->_related[$name]=array();
if($record instanceof CActiveRecord)
{
if($index===true)
$this->_related[$name][]=$record;
else
$this->_related[$name][$index]=$record;
}
}
else if(!isset($this->_related[$name]))
$this->_related[$name]=$record;
}
/**
* Returns all column attribute values.
* Note, related objects are not returned.
* @param mixed names of attributes whose value needs to be returned.
* If this is true (default), then all attribute values will be returned, including
* those that are not loaded from DB (null will be returned for those attributes).
* If this is null, all attributes except those that are not loaded from DB will be returned.
* @return array attribute values indexed by attribute names.
*/
public function getAttributes($names=true)
{
$attributes=$this->_attributes;
foreach($this->getMetaData()->columns as $name=>$column)
{
if(property_exists($this,$name))
$attributes[$name]=$this->$name;
else if($names===true && !isset($attributes[$name]))
$attributes[$name]=null;
}
if(is_array($names))
{
$attrs=array();
foreach($names as $name)
$attrs[$name]=isset($attributes[$name])?$attributes[$name]:null;
return $attrs;
}
else
return $attributes;
}
/**
* Saves the current record.
*
* The record is inserted as a row into the database table if its {@link isNewRecord}
* property is true (usually the case when the record is created using the 'new'
* operator). Otherwise, it will be used to update the corresponding row in the table
* (usually the case if the record is obtained using one of those 'find' methods.)
*
* Validation will be performed before saving the record. If the validation fails,
* the record will not be saved. You can call {@link getErrors()} to retrieve the
* validation errors.
*
* If the record is saved via insertion, its {@link isNewRecord} property will be
* set false, and its {@link scenario} property will be set to be 'update'.
* And if its primary key is auto-incremental and is not set before insertion,
* the primary key will be populated with the automatically generated key value.
*
* @param boolean whether to perform validation before saving the record.
* If the validation fails, the record will not be saved to database.
* @param array list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the saving succeeds
*/
public function save($runValidation=true,$attributes=null)
{
if(!$runValidation || $this->validate($attributes))
return $this->getIsNewRecord() ? $this->insert($attributes) : $this->update($attributes);
else
return false;
}
/**
* @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 $this->_new;
}
/**
* @param boolean whether the record is new and should be inserted when calling {@link save}.
* @see getIsNewRecord
*/
public function setIsNewRecord($value)
{
$this->_new=$value;
}
/**
* This event is raised before the record is saved.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onBeforeSave($event)
{
$this->raiseEvent('onBeforeSave',$event);
}
/**
* This event is raised after the record is saved.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onAfterSave($event)
{
$this->raiseEvent('onAfterSave',$event);
}
/**
* This event is raised before the record is deleted.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onBeforeDelete($event)
{
$this->raiseEvent('onBeforeDelete',$event);
}
/**
* This event is raised after the record is deleted.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onAfterDelete($event)
{
$this->raiseEvent('onAfterDelete',$event);
}
/**
* This event is raised after the record instance is created by new operator.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onAfterConstruct($event)
{
$this->raiseEvent('onAfterConstruct',$event);
}
/**
* This event is raised before an AR finder performs a find call.
* @param CEvent the event parameter
* @see beforeFind
* @since 1.0.9
*/
public function onBeforeFind($event)
{
$this->raiseEvent('onBeforeFind',$event);
}
/**
* This event is raised after the record is instantiated by a find method.
* @param CEvent the event parameter
* @since 1.0.2
*/
public function onAfterFind($event)
{
$this->raiseEvent('onAfterFind',$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 after a record instance is created by new operator.
* The default implementation raises the {@link onAfterConstruct} event.
* You may override this method to do postprocessing after record creation.
* Make sure you call the parent implementation so that the event is raised properly.
*/
protected function afterConstruct()
{
if($this->hasEventHandler('onAfterConstruct'))
$this->onAfterConstruct(new CEvent($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.
* @since 1.0.9
*/
protected function beforeFind()
{
if($this->hasEventHandler('onBeforeFind'))
$this->onBeforeFind(new CEvent($this));
}
/**
* 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));
}
/**
* Calls {@link beforeFind}.
* This method is internally used.
* @since 1.0.11
*/
public function beforeFindInternal()
{
$this->beforeFind();
}
/**
* Calls {@link afterFind}.
* This method is internally used.
* @since 1.0.3
*/
public function afterFindInternal()
{
$this->afterFind();
}
/**
* Inserts a row into the table based on this active record attributes.
* If the table's primary key is auto-incremental and is null before insertion,
* it will be populated with the actual value after insertion.
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
* After the record is inserted to DB successfully, its {@link isNewRecord} property will be set false,
* and its {@link scenario} property will be set to be 'update'.
* @param array list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the attributes are valid and the record is inserted successfully.
* @throws CException if the record is not new
*/
public function insert($attributes=null)
{
if(!$this->getIsNewRecord())
throw new CDbException(Yii::t('yii','The active record cannot be inserted to database because it is not new.'));
if($this->beforeSave())
{
Yii::trace(get_class($this).'.insert()','system.db.ar.CActiveRecord');
$builder=$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);
else if(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);
$this->setScenario('update');
return true;
}
}
return false;
}
/**
* Updates the row represented by this active record.
* All loaded attributes will be saved to the database.
* Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
* @param array list of attributes that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return boolean whether the update is successful
* @throws CException if the record is new
*/
public function update($attributes=null)
{
if($this->getIsNewRecord())
throw new CDbException(Yii::t('yii','The active record cannot be updated because it is new.'));
if($this->beforeSave())
{
Yii::trace(get_class($this).'.update()','system.db.ar.CActiveRecord');
if($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. It thus has better performance.
* Note, 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'];
* $postRecord->save();
* </pre>
* @param array attributes to be updated. Each element represents an attribute name
* or an attribute value indexed by its name. If the latter, the record's
* attribute will be changed accordingly before saving.
* @return boolean whether the update is successful
* @throws CException if the record is new or any database error
*/
public function saveAttributes($attributes)
{
if(!$this->getIsNewRecord())
{
Yii::trace(get_class($this).'.saveAttributes()','system.db.ar.CActiveRecord');
$values=array();
foreach($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 CDbException(Yii::t('yii','The active record cannot be updated because it is new.'));
}
/**
* 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.CActiveRecord');
if($this->beforeDelete())
{
$result=$this->deleteByPk($this->getPrimaryKey())>0;
$this->afterDelete();
return $result;
}
else
return false;
}
else
throw new CDbException(Yii::t('yii','The active record cannot be deleted because it is new.'));
}
/**
* Repopulates this active record with the latest data.
* @return boolean whether the row still exists in the database. If true, the latest data will be populated to this active record.
*/
public function refresh()
{
Yii::trace(get_class($this).'.refresh()','system.db.ar.CActiveRecord');
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 this active record with another one.
* The comparison is made by comparing the primary key values of the two active records.
* @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();
}
/**
* @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()
{
$table=$this->getMetaData()->tableSchema;
if(is_string($table->primaryKey))
return $this->{$table->primaryKey};
else if(is_array($table->primaryKey))
{
$values=array();
foreach($table->primaryKey as $name)
$values[$name]=$this->$name;
return $values;
}
else
return null;
}
/**
* Sets the primary key value.
* After calling this method, the old primary key value can be obtained from {@link oldPrimaryKey}.
* @param mixed the new primary key value. If the primary key is composite, the new value
* should be provided as an array (column name=>column value).
* @since 1.1.0
*/
public function setPrimaryKey($value)
{
$this->_pk=$this->getPrimaryKey();
$table=$this->getMetaData()->tableSchema;
if(is_string($table->primaryKey))
$this->{$table->primaryKey}=$value;
else if(is_array($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.
* @since 1.1.0
*/
public function getOldPrimaryKey()
{
return $this->_pk;
}
private function query($criteria,$all=false)
{
$this->applyScopes($criteria);
if(empty($criteria->with))
{
if(!$all)
$criteria->limit=1;
$this->beforeFind();
$command=$this->getCommandBuilder()->createFindCommand($this->getTableSchema(),$criteria);
return $all ? $this->populateRecords($command->queryAll()) : $this->populateRecord($command->queryRow());
}
else
return $this->with($criteria->with)->query($criteria,$all);
}
/**
* Applies the query scopes to the given criteria.
* This method merges {@link dbCriteria} with the given criteria parameter.
* It then resets {@link dbCriteria} to be null.
* @param CDbCriteria the query criteria. This parameter may be modified by merging {@link dbCriteria}.
* @since 1.0.12
*/
public function applyScopes(&$criteria)
{
if(($c=$this->getDbCriteria(false))!==null)
{
$c->mergeWith($criteria);
$criteria=$c;
$this->_c=null;
}
}
/**
* Returns the default table alias to be used by the find methods.
* This method will return the 'alias' option if it is set in {@link defaultScope}.
* Otherwise, it will return 't' as the default alias.
* @param boolean whether to quote the alias name
* @return string the default table alias
* @since 1.1.1
*/
public function getTableAlias($quote=false)
{
if(($criteria=$this->getDbCriteria(false))!==null && $criteria->alias!='')
$alias=$criteria->alias;
else
$alias='t';
return $quote ? $this->getDbConnection()->getSchema()->quoteTableName($alias) : $alias;
}
/**
* Finds a single active record with the specified condition.
* @param mixed query condition or criteria.
* If a string, it is treated as query condition (the WHERE clause);
* If an array, it is treated as the initial values for constructing a {@link CDbCriteria} object;
* Otherwise, it should be an instance of {@link CDbCriteria}.
* @param array parameters to be bound to an SQL statement.
* This is only used when the first parameter is a string (query condition).
* In other cases, please use {@link CDbCriteria::params} to set parameters.
* @return CActiveRecord the record found. Null if no record is found.
*/
public function find($condition='',$params=array())
{
Yii::trace(get_class($this).'.find()','system.db.ar.CActiveRecord');
$criteria=$this->getCommandBuilder()->createCriteria($condition,$params);
return $this->query($criteria);
}
/**
* Finds all active records satisfying the specified condition.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return array list of active records satisfying the specified condition. An empty array is returned if none is found.
*/
public function findAll($condition='',$params=array())
{
Yii::trace(get_class($this).'.findAll()','system.db.ar.CActiveRecord');
$criteria=$this->getCommandBuilder()->createCriteria($condition,$params);
return $this->query($criteria,true);
}
/**
* Finds a single active record with the specified primary key.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return CActiveRecord the record found. Null if none is found.
*/
public function findByPk($pk,$condition='',$params=array())
{
Yii::trace(get_class($this).'.findByPk()','system.db.ar.CActiveRecord');
$prefix=$this->getTableAlias(true).'.';
$criteria=$this->getCommandBuilder()->createPkCriteria($this->getTableSchema(),$pk,$condition,$params,$prefix);
return $this->query($criteria);
}
/**
* Finds all active records with the specified primary keys.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return array the records found. An empty array is returned if none is found.
*/
public function findAllByPk($pk,$condition='',$params=array())
{
Yii::trace(get_class($this).'.findAllByPk()','system.db.ar.CActiveRecord');
$prefix=$this->getTableAlias(true).'.';
$criteria=$this->getCommandBuilder()->createPkCriteria($this->getTableSchema(),$pk,$condition,$params,$prefix);
return $this->query($criteria,true);
}
/**
* Finds a single active record that has the specified attribute values.
* See {@link find()} for detailed explanation about $condition and $params.
* @param array list of attribute values (indexed by attribute names) that the active records should match.
* Since version 1.0.8, an attribute value can be an array which will be used to generate an IN condition.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return CActiveRecord the record found. Null if none is found.
*/
public function findByAttributes($attributes,$condition='',$params=array())
{
Yii::trace(get_class($this).'.findByAttributes()','system.db.ar.CActiveRecord');
$prefix=$this->getTableAlias(true).'.';
$criteria=$this->getCommandBuilder()->createColumnCriteria($this->getTableSchema(),$attributes,$condition,$params,$prefix);
return $this->query($criteria);
}
/**
* Finds all active records that have the specified attribute values.
* See {@link find()} for detailed explanation about $condition and $params.
* @param array list of attribute values (indexed by attribute names) that the active records should match.
* Since version 1.0.8, an attribute value can be an array which will be used to generate an IN condition.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return array the records found. An empty array is returned if none is found.
*/
public function findAllByAttributes($attributes,$condition='',$params=array())
{
Yii::trace(get_class($this).'.findAllByAttributes()','system.db.ar.CActiveRecord');
$prefix=$this->getTableAlias(true).'.';
$criteria=$this->getCommandBuilder()->createColumnCriteria($this->getTableSchema(),$attributes,$condition,$params,$prefix);
return $this->query($criteria,true);
}
/**
* Finds a single active record with the specified SQL statement.
* @param string the SQL statement
* @param array parameters to be bound to the SQL statement
* @return CActiveRecord the record found. Null if none is found.
*/
public function findBySql($sql,$params=array())
{
Yii::trace(get_class($this).'.findBySql()','system.db.ar.CActiveRecord');
$command=$this->getCommandBuilder()->createSqlCommand($sql,$params);
return $this->populateRecord($command->queryRow());
}
/**
* Finds all active records using the specified SQL statement.
* @param string the SQL statement
* @param array parameters to be bound to the SQL statement
* @return array the records found. An empty array is returned if none is found.
*/
public function findAllBySql($sql,$params=array())
{
Yii::trace(get_class($this).'.findAllBySql()','system.db.ar.CActiveRecord');
$command=$this->getCommandBuilder()->createSqlCommand($sql,$params);
return $this->populateRecords($command->queryAll());
}
/**
* Finds the number of rows satisfying the specified query condition.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows satisfying the specified query condition.
*/
public function count($condition='',$params=array())
{
Yii::trace(get_class($this).'.count()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createCriteria($condition,$params);
$this->applyScopes($criteria);
if(empty($criteria->with))
return $builder->createCountCommand($this->getTableSchema(),$criteria)->queryScalar();
else
return $this->with($criteria->with)->count($criteria);
}
/**
* Finds the number of rows using the given SQL statement.
* @param string the SQL statement
* @param array parameters to be bound to the SQL statement
* @return integer the number of rows using the given SQL statement.
*/
public function countBySql($sql,$params=array())
{
Yii::trace(get_class($this).'.countBySql()','system.db.ar.CActiveRecord');
return $this->getCommandBuilder()->createSqlCommand($sql,$params)->queryScalar();
}
/**
* Checks whether there is row satisfying the specified condition.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return boolean whether there is row satisfying the specified condition.
*/
public function exists($condition,$params=array())
{
Yii::trace(get_class($this).'.exists()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createCriteria($condition,$params);
$table=$this->getTableSchema();
$criteria->select=reset($table->columns)->rawName;
$criteria->limit=1;
$this->applyScopes($criteria);
return $builder->createFindCommand($table,$criteria)->queryRow()!==false;
}
/**
* Specifies which related objects should be eagerly loaded.
* This method takes variable number of parameters. Each parameter specifies
* the name of a relation or child-relation. For example,
* <pre>
* // find all posts together with their author and comments
* Post::model()->with('author','comments')->findAll();
* // find all posts together with their author and the author's profile
* Post::model()->with('author','author.profile')->findAll();
* </pre>
* The relations should be declared in {@link relations()}.
*
* By default, the options specified in {@link relations()} will be used
* to do relational query. In order to customize the options on the fly,
* we should pass an array parameter to the with() method. The array keys
* are relation names, and the array values are the corresponding query options.
* For example,
* <pre>
* Post::model()->with(array(
* 'author'=>array('select'=>'id, name'),
* 'comments'=>array('condition'=>'approved=1', 'order'=>'createTime'),
* ))->findAll();
* </pre>
*
* This method returns a {@link CActiveFinder} instance that provides
* a set of find methods similar to that of CActiveRecord.
*
* Note, the possible parameters to this method have been changed since version 1.0.2.
* Previously, it was not possible to specify on-th-fly query options,
* and child-relations were specified as hierarchical arrays.
*
* @return CActiveFinder the active finder instance. If no parameter is passed in, the object itself will be returned.
*/
public function with()
{
if(func_num_args()>0)
{
$with=func_get_args();
if(is_array($with[0])) // the parameter is given as an array
$with=$with[0];
return new CActiveFinder($this,$with);
}
else
return $this;
}
/**
* Updates records with the specified primary key(s).
* See {@link find()} for detailed explanation about $condition and $params.
* Note, the attributes are not checked for safety and validation is NOT performed.
* @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
* @param array list of attributes (name=>$value) to be updated
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows being updated
*/
public function updateByPk($pk,$attributes,$condition='',$params=array())
{
Yii::trace(get_class($this).'.updateByPk()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$table=$this->getTableSchema();
$criteria=$builder->createPkCriteria($table,$pk,$condition,$params);
$command=$builder->createUpdateCommand($table,$attributes,$criteria);
return $command->execute();
}
/**
* Updates records with the specified condition.
* See {@link find()} for detailed explanation about $condition and $params.
* Note, the attributes are not checked for safety and no validation is done.
* @param array list of attributes (name=>$value) to be updated
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows being updated
*/
public function updateAll($attributes,$condition='',$params=array())
{
Yii::trace(get_class($this).'.updateAll()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createCriteria($condition,$params);
$command=$builder->createUpdateCommand($this->getTableSchema(),$attributes,$criteria);
return $command->execute();
}
/**
* Updates one or several counter columns.
* Note, this updates all rows of data unless a condition or criteria is specified.
* See {@link find()} for detailed explanation about $condition and $params.
* @param array the counters to be updated (column name=>increment value)
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows being updated
*/
public function updateCounters($counters,$condition='',$params=array())
{
Yii::trace(get_class($this).'.updateCounters()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createCriteria($condition,$params);
$command=$builder->createUpdateCounterCommand($this->getTableSchema(),$counters,$criteria);
return $command->execute();
}
/**
* Deletes rows with the specified primary key.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows deleted
*/
public function deleteByPk($pk,$condition='',$params=array())
{
Yii::trace(get_class($this).'.deleteByPk()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createPkCriteria($this->getTableSchema(),$pk,$condition,$params);
$command=$builder->createDeleteCommand($this->getTableSchema(),$criteria);
return $command->execute();
}
/**
* Deletes rows with the specified condition.
* See {@link find()} for detailed explanation about $condition and $params.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return integer the number of rows deleted
*/
public function deleteAll($condition='',$params=array())
{
Yii::trace(get_class($this).'.deleteAll()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$criteria=$builder->createCriteria($condition,$params);
$command=$builder->createDeleteCommand($this->getTableSchema(),$criteria);
return $command->execute();
}
/**
* Deletes rows which match the specified attribute values.
* See {@link find()} for detailed explanation about $condition and $params.
* @param array list of attribute values (indexed by attribute names) that the active records should match.
* Since version 1.0.8, an attribute value can be an array which will be used to generate an IN condition.
* @param mixed query condition or criteria.
* @param array parameters to be bound to an SQL statement.
* @return CActiveRecord the record found. Null if none is found.
* @since 1.0.9
*/
public function deleteAllByAttributes($attributes,$condition='',$params=array())
{
Yii::trace(get_class($this).'.deleteAllByAttributes()','system.db.ar.CActiveRecord');
$builder=$this->getCommandBuilder();
$table=$this->getTableSchema();
$criteria=$builder->createColumnCriteria($table,$attributes,$condition,$params);
$command=$builder->createDeleteCommand($table,$criteria);
return $command->execute();
}
/**
* Creates an active record with the given attributes.
* This method is internally used by the find methods.
* @param array attribute values (column name=>column value)
* @param boolean whether to call {@link afterFind} after the record is populated.
* This parameter is added in version 1.0.3.
* @return CActiveRecord the newly created active record. The class of the object is the same as the model class.
* Null is returned if the input data is false.
*/
public function populateRecord($attributes,$callAfterFind=true)
{
if($attributes!==false)
{
$record=$this->instantiate($attributes);
$record->setScenario('update');
$record->init();
$md=$record->getMetaData();
foreach($attributes as $name=>$value)
{
if(property_exists($record,$name))
$record->$name=$value;
else if(isset($md->columns[$name]))
$record->_attributes[$name]=$value;
}
$record->_pk=$record->getPrimaryKey();
$record->attachBehaviors($record->behaviors());
if($callAfterFind)
$record->afterFind();
return $record;
}
else
return null;
}
/**
* Creates a list of active records based on the input data.
* This method is internally used by the find methods.
* @param array list of attribute values for the active records.
* @param boolean whether to call {@link afterFind} after each record is populated.
* This parameter is added in version 1.0.3.
* @return array list of active records.
*/
public function populateRecords($data,$callAfterFind=true)
{
$records=array();
foreach($data as $attributes)
$records[]=$this->populateRecord($attributes,$callAfterFind);
return $records;
}
/**
* Creates an active record instance.
* This method is called by {@link populateRecord} and {@link populateRecords}.
* You may override this method if the instance being created
* depends the attributes that are to be populated to the record.
* For example, by creating a record based on the value of a column,
* you may implement the so-called single-table inheritance mapping.
* @param array list of attribute values for the active records.
* @return CActiveRecord the active record
* @since 1.0.2
*/
protected function instantiate($attributes)
{
$class=get_class($this);
$model=new $class(null);
return $model;
}
/**
* Returns whether there is an element at the specified offset.
* This method is required by the interface ArrayAccess.
* @param mixed the offset to check on
* @return boolean
* @since 1.0.2
*/
public function offsetExists($offset)
{
return isset($this->getMetaData()->columns[$offset]);
}
}
/**
* CBaseActiveRelation is the base class for all active relations.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0.4
*/
class CBaseActiveRelation extends CComponent
{
/**
* @var string name of the related object
*/
public $name;
/**
* @var string name of the related active record class
*/
public $className;
/**
* @var string the foreign key in this relation
*/
public $foreignKey;
/**
* @var mixed list of column names (an array, or a string of names separated by commas) to be selected.
* Do not quote or prefix the column names unless they are used in an expression.
* In that case, you should prefix the column names with 'relationName.'.
*/
public $select='*';
/**
* @var string WHERE clause. For {@link CActiveRelation} descendant classes, column names
* referenced in the condition should be disambiguated with prefix 'relationName.'.
*/
public $condition='';
/**
* @var array the parameters that are to be bound to the condition.
* The keys are parameter placeholder names, and the values are parameter values.
*/
public $params=array();
/**
* @var string GROUP BY clause. For {@link CActiveRelation} descendant classes, column names
* referenced in this property should be disambiguated with prefix 'relationName.'.
*/
public $group='';
/**
* @var string HAVING clause. For {@link CActiveRelation} descendant classes, column names
* referenced in this property should be disambiguated with prefix 'relationName.'.
*/
public $having='';
/**
* @var string ORDER BY clause. For {@link CActiveRelation} descendant classes, column names
* referenced in this property should be disambiguated with prefix 'relationName.'.
*/
public $order='';
/**
* Constructor.
* @param string name of the relation
* @param string name of the related active record class
* @param string foreign key for this relation
* @param array additional options (name=>value). The keys must be the property names of this class.
*/
public function __construct($name,$className,$foreignKey,$options=array())
{
$this->name=$name;
$this->className=$className;
$this->foreignKey=$foreignKey;
foreach($options as $name=>$value)
$this->$name=$value;
}
/**
* Merges this relation with a criteria specified dynamically.
* @param array the dynamically specified criteria
* @since 1.0.5
*/
public function mergeWith($criteria)
{
if(isset($criteria['select']) && $this->select!==$criteria['select'])
{
if($this->select==='*')
$this->select=$criteria['select'];
else if($criteria['select']!=='*')
{
$select1=is_string($this->select)?preg_split('/\s*,\s*/',trim($this->select),-1,PREG_SPLIT_NO_EMPTY):$this->select;
$select2=is_string($criteria['select'])?preg_split('/\s*,\s*/',trim($criteria['select']),-1,PREG_SPLIT_NO_EMPTY):$criteria['select'];
$this->select=array_merge($select1,array_diff($select2,$select1));
}
}
if(isset($criteria['condition']) && $this->condition!==$criteria['condition'])
{
if($this->condition==='')
$this->condition=$criteria['condition'];
else if($criteria['condition']!=='')
$this->condition="({$this->condition}) AND ({$criteria['condition']})";
}
if(isset($criteria['params']) && $this->params!==$criteria['params'])
$this->params=array_merge($this->params,$criteria['params']);
if(isset($criteria['order']) && $this->order!==$criteria['order'])
{
if($this->order==='')
$this->order=$criteria['order'];
else if($criteria['order']!=='')
$this->order=$criteria['order'].', '.$this->order;
}
if(isset($criteria['group']) && $this->group!==$criteria['group'])
{
if($this->group==='')
$this->group=$criteria['group'];
else if($criteria['group']!=='')
$this->group.=', '.$criteria['group'];
}
if(isset($criteria['having']) && $this->having!==$criteria['having'])
{
if($this->having==='')
$this->having=$criteria['having'];
else if($criteria['having']!=='')
$this->having="({$this->having}) AND ({$criteria['having']})";
}
}
}
/**
* CStatRelation represents a statistical relational query.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0.4
*/
class CStatRelation extends CBaseActiveRelation
{
/**
* @var string the statistical expression. Defaults to 'COUNT(*)', meaning
* the count of child objects.
*/
public $select='COUNT(*)';
/**
* @var mixed the default value to be assigned to those records that do not
* receive a statistical query result. Defaults to 0.
*/
public $defaultValue=0;
/**
* Merges this relation with a criteria specified dynamically.
* @param array the dynamically specified criteria
* @since 1.0.5
*/
public function mergeWith($criteria)
{
parent::mergeWith($criteria);
if(isset($criteria['defaultValue']))
$this->defaultValue=$criteria['defaultValue'];
}
}
/**
* CActiveRelation is the base class for representing active relations that bring back related objects.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CActiveRelation extends CBaseActiveRelation
{
/**
* @var string join type. Defaults to 'LEFT OUTER JOIN'.
*/
public $joinType='LEFT OUTER JOIN';
/**
* @var string ON clause. The condition specified here will be appended to the joining condition using AND operator.
* @since 1.0.2
*/
public $on='';
/**
* @var string the alias for the table that this relation refers to. Defaults to null, meaning
* the alias will be the same as the relation name.
* @since 1.0.1
*/
public $alias;
/**
* @var string|array specifies which related objects should be eagerly loaded when this related object is lazily loaded.
* For more details about this property, see {@link CActiveRecord::with()}.
*/
public $with=array();
/**
* Merges this relation with a criteria specified dynamically.
* @param array the dynamically specified criteria
* @since 1.0.5
*/
public function mergeWith($criteria)
{
parent::mergeWith($criteria);
if(isset($criteria['joinType']))
$this->joinType=$criteria['joinType'];
if(isset($criteria['on']) && $this->on!==$criteria['on'])
{
if($this->on==='')
$this->on=$criteria['on'];
else if($criteria['on']!=='')
$this->on="({$this->on}) AND ({$criteria['on']})";
}
if(isset($criteria['with']))
$this->with=$criteria['with'];
if(isset($criteria['alias']))
$this->alias=$criteria['alias'];
if(isset($criteria['together']))
$this->together=$criteria['together'];
}
}
/**
* CBelongsToRelation represents the parameters specifying a BELONGS_TO relation.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CBelongsToRelation extends CActiveRelation
{
}
/**
* CHasOneRelation represents the parameters specifying a HAS_ONE relation.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CHasOneRelation extends CActiveRelation
{
}
/**
* CHasManyRelation represents the parameters specifying a HAS_MANY relation.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CHasManyRelation extends CActiveRelation
{
/**
* @var integer limit of the rows to be selected. It is effective only for lazy loading this related object. Defaults to -1, meaning no limit.
*/
public $limit=-1;
/**
* @var integer offset of the rows to be selected. It is effective only for lazy loading this related object. Defaults to -1, meaning no offset.
*/
public $offset=-1;
/**
* @var boolean whether this table should be joined with the primary table.
* When setting this property to be false, the table associated with this relation will
* appear in a separate JOIN statement. Defaults to true, meaning the table will be joined
* together with the primary table. Note that in version 1.0.x, the default value of this property was false.
*/
public $together=true;
/**
* @var string the name of the column that should be used as the key for storing related objects.
* Defaults to null, meaning using zero-based integer IDs.
* @since 1.0.7
*/
public $index;
/**
* Merges this relation with a criteria specified dynamically.
* @param array the dynamically specified criteria
* @since 1.0.5
*/
public function mergeWith($criteria)
{
parent::mergeWith($criteria);
if(isset($criteria['limit']) && $criteria['limit']>0)
$this->limit=$criteria['limit'];
if(isset($criteria['offset']) && $criteria['offset']>=0)
$this->offset=$criteria['offset'];
if(isset($criteria['index']))
$this->index=$criteria['index'];
}
}
/**
* CManyManyRelation represents the parameters specifying a MANY_MANY relation.
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CManyManyRelation extends CHasManyRelation
{
}
/**
* CActiveRecordMetaData represents the meta-data for an Active Record class.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.ar
* @since 1.0
*/
class CActiveRecordMetaData
{
/**
* @var CDbTableSchema the table schema information
*/
public $tableSchema;
/**
* @var array table columns
*/
public $columns;
/**
* @var array list of relations
*/
public $relations=array();
/**
* @var array attribute default values
*/
public $attributeDefaults=array();
private $_model;
/**
* Constructor.
* @param CActiveRecord the model instance
*/
public function __construct($model)
{
$this->_model=$model;
$tableName=$model->tableName();
if(($table=$model->getDbConnection()->getSchema()->getTable($tableName))===null)
throw new CDbException(Yii::t('yii','The table "{table}" for active record class "{class}" cannot be found in the database.',
array('{class}'=>get_class($model),'{table}'=>$tableName)));
if($table->primaryKey===null)
$table->primaryKey=$model->primaryKey();
$this->tableSchema=$table;
$this->columns=$table->columns;
foreach($table->columns as $name=>$column)
{
if(!$column->isPrimaryKey && $column->defaultValue!==null)
$this->attributeDefaults[$name]=$column->defaultValue;
}
foreach($model->relations() as $name=>$config)
{
$this->addRelation($name,$config);
}
}
/**
* Adds a relation.
*
* $config is an array with three elements:
* relation type, the related active record class and the foreign key.
*
* @throws CDbException
* @param string $name Name of the relation.
* @param array $config Relation parameters.
* @return void
* @since 1.1.2
*/
public function addRelation($name,$config)
{
if(isset($config[0],$config[1],$config[2])) // relation class, AR class, FK
$this->relations[$name]=new $config[0]($name,$config[1],$config[2],array_slice($config,3));
else
throw new CDbException(Yii::t('yii','Active record "{class}" has an invalid configuration for relation "{relation}". It must specify the relation type, the related active record class and the foreign key.', array('{class}'=>get_class($this->_model),'{relation}'=>$name)));
}
/**
* Checks if there is a relation with specified name defined.
*
* @param string $name Name of the relation.
* @return boolean
* @since 1.1.2
*/
public function hasRelation($name)
{
return isset($this->relations[$name]);
}
/**
* Deletes a relation with specified name.
*
* @param string $name
* @return void
* @since 1.1.2
*/
public function removeRelation($name)
{
unset($this->relations[$name]);
}
}
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