diff options
Diffstat (limited to 'framework/Data/ActiveRecord/Relations')
3 files changed, 71 insertions, 8 deletions
diff --git a/framework/Data/ActiveRecord/Relations/TActiveRecordHasManyAssociation.php b/framework/Data/ActiveRecord/Relations/TActiveRecordHasManyAssociation.php index a86fdffd..bb2cc583 100644 --- a/framework/Data/ActiveRecord/Relations/TActiveRecordHasManyAssociation.php +++ b/framework/Data/ActiveRecord/Relations/TActiveRecordHasManyAssociation.php @@ -1,4 +1,4 @@ -<?php +<?php
/**
* Loads base active record relations class.
@@ -75,18 +75,28 @@ class TActiveRecordHasManyAssociation extends TActiveRecordRelation $finder = $this->getContext()->getForeignRecordFinder();
$command = $this->createCommand($criteria, $foreignKeys,$indexValues,$sourceKeys);
$srcProps = array_keys($sourceKeys);
- $type = get_class($finder);
$collections=array();
foreach($command->query() as $row)
{
$hash = $this->getObjectHash($row, $srcProps);
foreach($srcProps as $column)
unset($row[$column]);
- $collections[$hash][] = $finder->populateObject($type,$row);
+ $collections[$hash][] = $this->populateObject($finder, $row);
}
$this->setResultCollection($results, $collections, array_values($sourceKeys));
}
+
+ protected function populateObject($finder, $data)
+ {
+ $registry = $finder->getRecordManager()->getObjectStateRegistry();
+ if(!is_null($obj = $registry->getCachedInstance($data, false)))
+ return $obj;
+ $gateway = $finder->getRecordManager()->getRecordGateway();
+ $type = get_class($finder);
+ $obj = new $type($data);
+ return $registry->addCachedInstance($data,$obj);
+ }
/**
* @param TSqlCriteria
@@ -145,5 +155,5 @@ class TActiveRecordHasManyAssociation extends TActiveRecordRelation return "INNER JOIN {$refTable} ON ({$joinCondition}) AND {$index}";
}
-} +}
?>
\ No newline at end of file diff --git a/framework/Data/ActiveRecord/Relations/TActiveRecordHasOne.php b/framework/Data/ActiveRecord/Relations/TActiveRecordHasOne.php index e8c2ccee..4286254b 100644 --- a/framework/Data/ActiveRecord/Relations/TActiveRecordHasOne.php +++ b/framework/Data/ActiveRecord/Relations/TActiveRecordHasOne.php @@ -18,10 +18,63 @@ Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordRelation'); /**
* TActiveRecordHasOne models the object relationship that a record (the source object)
* property is an instance of foreign record object having a foreign key
- * related to the source object.
+ * related to the source object. The HAS_ONE relation is very similar to the
+ * HAS_MANY relationship (in fact, it is equivalent in the entities relationship point of view).
*
+ * 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 <b>entity</b> relationship between a Car and a Engine.
+ * <code>
+ * +-----+ +--------+
+ * | Car | 1 <----- 1 | Engine |
+ * +-----+ +--------+
+ * </code>
+ * 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 <b>object</b> relationship as active record as follows.
+ * <code>
+ * class CarRecord extends TActiveRecord
+ * {
+ * const TABLE='car';
+ * public $car_id; //primary key
+ * public $colour;
+ *
+ * public $engine; //engine foreign object
+ *
+ * protected 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($className);
+ * }
+ * }
+ * </code>
+ * The <tt>$RELATIONS</tt> static property of CarRecord defines that the
+ * property <tt>$engine</tt> that will reference an <tt>EngineRecord</tt> instance.
+ *
+ * The car record with engine property list may be fetched as follows.
+ * <code>
+ * $cars = CarRecord::finder()->with_engine()->findAll();
+ * </code>
+ * The method <tt>with_xxx()</tt> (where <tt>xxx</tt> is the relationship property
+ * name, in this case, <tt>engine</tt>) fetchs the corresponding EngineRecords using
+ * a second query (not by using a join). The <tt>with_xxx()</tt> accepts the same
+ * arguments as other finder methods of TActiveRecord, e.g. <tt>with_engine('capacity < ?', 3.8)</tt>.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
diff --git a/framework/Data/ActiveRecord/Relations/TActiveRecordRelationContext.php b/framework/Data/ActiveRecord/Relations/TActiveRecordRelationContext.php index a33e105e..033d7638 100644 --- a/framework/Data/ActiveRecord/Relations/TActiveRecordRelationContext.php +++ b/framework/Data/ActiveRecord/Relations/TActiveRecordRelationContext.php @@ -1,4 +1,4 @@ -<?php +<?php
/**
* TActiveRecordRelationContext class.
*
@@ -156,9 +156,9 @@ class TActiveRecordRelationContext Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordBelongsTo');
return new TActiveRecordBelongsTo($this);
default:
- throw new TException('Not done yet');
+ throw new TActiveRecordException('ar_invalid_relationship');
}
}
}
- +
?>
\ No newline at end of file |