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<?php
/**
* Loads base active record relations class.
*/
Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordRelation');
class TActiveRecordHasManyAssociation extends TActiveRecordRelation
{
private $_association;
private $_sourceTable;
private $_foreignTable;
protected function collectForeignObjects(&$results)
{
$association = $this->getAssociationTable();
$sourceKeys = $this->findForeignKeys($association, $this->getSourceRecord());
$properties = array_values($sourceKeys);
$indexValues = $this->getIndexValues($properties, $results);
$fkObject = $this->getContext()->getForeignRecordFinder();
$foreignKeys = $this->findForeignKeys($association, $fkObject);
$this->fetchForeignObjects($results, $foreignKeys,$indexValues,$sourceKeys);
}
protected function getAssociationTable()
{
if($this->_association===null)
{
$gateway = $this->getSourceRecord()->getRecordGateway();
$conn = $this->getSourceRecord()->getDbConnection();
$table = $this->getContext()->getAssociationTable();
$this->_association = $gateway->getTableInfo($conn, $table);
}
return $this->_association;
}
protected function getSourceTable()
{
if($this->_sourceTable===null)
{
$gateway = $this->getSourceRecord()->getRecordGateway();
$this->_sourceTable = $gateway->getRecordTableInfo($this->getSourceRecord());
}
return $this->_sourceTable;
}
protected function getForeignTable()
{
if($this->_foreignTable===null)
{
$gateway = $this->getSourceRecord()->getRecordGateway();
$fkObject = $this->getContext()->getForeignRecordFinder();
$this->_foreignTable = $gateway->getRecordTableInfo($fkObject);
}
return $this->_foreignTable;
}
protected function getCommandBuilder()
{
return $this->getSourceRecord()->getRecordGateway()->getCommand($this->getSourceRecord());
}
/**
* Fetches the foreign objects using TActiveRecord::findAllByIndex()
* @param array field names
* @param array foreign key index values.
*/
protected function fetchForeignObjects(&$results,$foreignKeys,$indexValues,$sourceKeys)
{
$criteria = $this->getContext()->getCriteria();
$finder = $this->getContext()->getForeignRecordFinder();
$command = $this->createCommand($criteria, $foreignKeys,$indexValues,$sourceKeys);
$srcProps = array_keys($sourceKeys);
$collections=array();
foreach($command->query() as $row)
{
$hash = $this->getObjectHash($row, $srcProps);
foreach($srcProps as $column)
unset($row[$column]);
$collections[$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,$obj);
}
/**
* @param TSqlCriteria
* @param TTableInfo association table info
* @param array field names
* @param array field values
*/
public function createCommand($criteria, $foreignKeys,$indexValues,$sourceKeys)
{
$innerJoin = $this->getAssociationJoin($foreignKeys,$indexValues,$sourceKeys);
$fkTable = $this->getForeignTable()->getTableFullName();
$srcColumns = $this->getSourceColumns($sourceKeys);
if(($where=$criteria->getCondition())===null)
$where='1=1';
$sql = "SELECT {$fkTable}.*, {$srcColumns} FROM {$fkTable} {$innerJoin} WHERE {$where}";
$parameters = $criteria->getParameters()->toArray();
$ordering = $criteria->getOrdersBy();
$limit = $criteria->getLimit();
$offset = $criteria->getOffset();
$builder = $this->getCommandBuilder()->getBuilder();
$command = $builder->applyCriterias($sql,$parameters,$ordering,$limit,$offset);
$this->getCommandBuilder()->onCreateCommand($command, $criteria);
return $command;
}
protected function getSourceColumns($sourceKeys)
{
$columns=array();
$table = $this->getAssociationTable();
$tableName = $table->getTableFullName();
foreach($sourceKeys as $name=>$fkName)
$columns[] = $tableName.'.'.$table->getColumn($name)->getColumnName();
return implode(', ', $columns);
}
protected function getAssociationJoin($foreignKeys,$indexValues,$sourceKeys)
{
$refInfo= $this->getAssociationTable();
$fkInfo = $this->getForeignTable();
$refTable = $refInfo->getTableFullName();
$fkTable = $fkInfo->getTableFullName();
$joins = array();
foreach($foreignKeys as $ref=>$fk)
{
$refField = $refInfo->getColumn($ref)->getColumnName();
$fkField = $fkInfo->getColumn($fk)->getColumnName();
$joins[] = "{$fkTable}.{$fkField} = {$refTable}.{$refField}";
}
$joinCondition = implode(' AND ', $joins);
$index = $this->getCommandBuilder()->getIndexKeyCondition($refInfo,array_keys($sourceKeys), $indexValues);
return "INNER JOIN {$refTable} ON ({$joinCondition}) AND {$index}";
}
}
?>
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