<?php

/**

* Copyright 2016 OpenStack Foundation

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

**/

class NullAbleForeignKey extends ForeignKey

{

public function __construct($name, $object = null) {

parent::__construct($name, $object);

$this->defaultVal = 0 ;

}

public function nullValue() {

return "0";

}

public function requireField() {

$parts =

[

'datatype' => 'int',

'precision' => 11,

'null' => 'null',

'default' => $this->defaultVal,

'arrayValue' => $this->arrayValue

];

$values= ['type'=>'int', 'parts'=> $parts];

DB::requireField($this->tableName, $this->name, $values);

}

}