Yii solution to the problem of error reporting when using DeleteAll to delete concatenated tables

The example of this article describes the solution to the problem of error reporting when deleting concatenated tables using DeleteAll in Yii. I would like to share it with you for your reference. The details are as follows:

When deleting data, we often encounter the conditions for determining the deletion of data. Today, we use Yii's CDbCriteria to generate the relevant conditions. The database reports an error when deleting in batches.

The page code is:

$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);

The incorrect SQL is:

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))

The correct SQL statement should be:

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))

Trace back to Yii Base class:

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;
}

Solution. Modify the base class method:

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;
}

I hope this article will be helpful to everyone’s PHP program design based on the Yii framework.

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