yii\db\sqlite\QueryBuilder::dropForeignKey PHP Method

Builds a SQL statement for dropping a foreign key constraint.

public dropForeignKey ( string $name, string $table ) : string
$name	string	the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
$table	string	the table whose foreign is to be dropped. The name will be properly quoted by the method.
return	string	the SQL statement for dropping a foreign key constraint.

    public function dropForeignKey($name, $table)
    {
        throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
    }

QueryBuilder