Yii解决DeleteAll连表删除报错问题

具体如下：

删除数据的时候，经常会遇到连联判断删除数据的条件，今天用Yii 的CDbCriteria生成关连条件。批量删除的时候数据库报错。

页面代码为：

$criteria=new CDbCriteria;
$criteria->join = ' LEFT JOIN {{positions}} p ON p.zpo_id=t.zpo_id ';
$criteria->addCondition("p.zpo_type=1");
$criteria->addCondition("t.zpl_content_id in ($id)");
PosLog::model()->deleteAll($criteria);

错误SQL为：

DELETE FROM `zd_pos_log` LEFT JOIN zd_positions p ON p.zpo_id=t.zpo_id WHERE (p.zpo_type=1) AND (t.zpl_content_id in (76))

正确SQL语句应为：

DELETE t FROM `zd_pos_log` t LEFT JOIN zd_positions p ON p.zpo_id=t.zpo_id WHERE (p.zpo_type=1) AND (t.zpl_content_id in (76))

追溯到Yii 基类：

framework/db/schema/CDbCommandBuilder.php#166

public function createDeleteCommand($table,$criteria)
{
  $this->ensureTable($table);
  $sql="DELETE FROM {$table->rawName}";
  $sql=$this->applyJoin($sql,$criteria->join);
  $sql=$this->applyCondition($sql,$criteria->condition);
  $sql=$this->applyGroup($sql,$criteria->group);
  $sql=$this->applyHaving($sql,$criteria->having);
  $sql=$this->applyOrder($sql,$criteria->order);
  $sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
  $command=$this->_connection->createCommand($sql);
  $this->bindValues($command,$criteria->params);
  return $command;
}

解决方案。修改基类方法：

public function createDeleteCommand($table,$criteria,$alias='t')
{
  $this->ensureTable($table);
  $alias=$this->_schema->quoteTableName($alias);
  if(empty($criteria->join)){
    $sql="DELETE FROM {$table->rawName}";
  }else{
    $sql="DELETE $alias FROM {$table->rawName} $alias";
  }
  $sql=$this->applyJoin($sql,$criteria->join);
  $sql=$this->applyCondition($sql,$criteria->condition);
  $sql=$this->applyGroup($sql,$criteria->group);
  $sql=$this->applyHaving($sql,$criteria->having);
  $sql=$this->applyOrder($sql,$criteria->order);
  $sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
  $command=$this->_connection->createCommand($sql);
  $this->bindValues($command,$criteria->params);
  return $command;
}

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