• 홈
• Prado
• Data
• ActiveRecord
• Relations
• TActiveRecordHasOne

PHP 클래스 Prado\Data\ActiveRecord\Relations\TActiveRecordHasOne

The difference of HAS_ONE from HAS_MANY is that the foreign object is singular. That is, HAS_MANY will return a collection of records while HAS_ONE returns the corresponding record. Consider the entity relationship between a Car and a Engine. +-----+ +--------+ | Car | 1 <----- 1 | Engine | +-----+ +--------+ Where each engine belongs to only one car, that is, the Engine entity has a foreign key to the Car's primary key. We may model Engine-Car object relationship as active record as follows. class CarRecord extends TActiveRecord { const TABLE='car'; public $car_id; //primary key public $colour; public $engine; //engine foreign object public static $RELATIONS=array ( 'engine' => array(self::HAS_ONE, 'EngineRecord') ); public static function finder($className=__CLASS__) { return parent::finder($className); } } class EngineRecord extends TActiveRecord { const TABLE='engine'; public $engine_id; public $capacity; public $car_id; //foreign key to cars public static function finder($className=__CLASS__) { return parent::finder($className); } } The static $RELATIONS property of CarRecord defines that the property $engine that will reference an EngineRecord instance. The car record with engine property list may be fetched as follows. $cars = CarRecord::finder()->with_engine()->findAll(); The method with_xxx() (where xxx is the relationship property name, in this case, engine) fetchs the corresponding EngineRecords using a second query (not by using a join). The with_xxx() accepts the same arguments as other finder methods of TActiveRecord, e.g. with_engine('capacity < ?', 3.8). 파일 보기 프로젝트 열기: pradosoft/prado

공개 메소드들

메소드	설명
getRelationForeignKeys ( ) : array
updateAssociatedRecords ( ) : boolean	Updates the associated foreign objects.

보호된 메소드들

메소드	설명
collectForeignObjects ( &$results )	Get the foreign key index values from the results and make calls to the database to find the corresponding foreign objects.
setObjectProperty ( $source, $properties, &$collections )	Sets the foreign objects to the given property on the source object.

메소드 상세