how to concat rules for the same AR model in Yii - class

Question

I use Yii MVC.
I have to add new columns in a data table very often.
I want to use Gii and regenerate the model and keep the chnages that i made; changes like constants, variables, rules, relations, etc ...
So, let's take for example the url class model:
<?php
/**
* This is the model class for table "url".
*
* The followings are the` available columns in table 'url':
* #property string $id
* #property integer $instance_id
* #property integer $website_id
* #property string $link
* #property string $title
* #property integer $created
* #property integer $updated
* #property integer $status
*/
class Url extends CActiveRecord {
const ACTIVE = 1;
/**
* Returns the static model of the specified AR class.
* #param string $className active record class name.
* #return Url the static model class
*/
public static function model($className = __CLASS__) {
return parent::model($className);
}
/**
* #return string the associated database table name
*/
public function tableName() {
return 'url';
}
/**
* #return array validation rules for model attributes.
*/
public function rules() {
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('instance_id, website_id, link, title, created, updated, status', 'required'),
array('instance_id, website_id, created, updated, status', 'numerical', 'integerOnly' => true),
array('link, title', 'length', 'max' => 255),
array('link', 'unique'),
// The following rule is used by search().
// Please remove those attributes that should not be searched.
array('id, instance_id, website_id, link, title, created, updated, status', 'safe', 'on' => 'search'),
);
}
/**
* #return array relational rules.
*/
public function relations() {
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
);
}
/**
* #return array customized attribute labels (name=>label)
*/
public function attributeLabels() {
return array(
'id' => 'ID',
'instance_id' => 'Instance',
'website_id' => 'Website',
'link' => 'Link',
'title' => 'Title',
'created' => 'Created',
'updated' => 'Updated',
'status' => 'Status',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
* #return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
*/
public function search() {
// Warning: Please modify the following code to remove attributes that
// should not be searched.
$criteria = new CDbCriteria;
$criteria->compare('id', $this->id, true);
$criteria->compare('instance_id', $this->instance_id);
$criteria->compare('website_id', $this->website_id);
$criteria->compare('link', $this->link, true);
$criteria->compare('title', $this->title, true);
$criteria->compare('created', $this->created);
$criteria->compare('updated', $this->updated);
$criteria->compare('status', $this->status);
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
));
}
}
when I will regenerate the model, the const and the rule with unique will be lost
so, I created a new model class, UrlM, that extends the url model class, and this class keps all my enhancements:
<?php
class UrlM extends Url {
const ACTIVE = 1;
public function rules() {
return array(
array('link', 'unique'),
);
}
public function relations() {
return array(
);
}
}
how do i concat the rules from the url model class with the rules from the urlm model class?
the same answer should aply for future enhancements, like relations

Answer 1

Each function of the parent class - like rules(), relations() etc., returns array. So you may use call to the parent::rules() and then just join "array".
public function rules() {
$myParentRules=parent::rules();
$myConcatRules=$myParentRules + array(
array('link', 'unique'),
);
return $myConcatRules;
}

Answer 2

array_merge will help you.
public function rules() {
$myRules = array(
array('id', 'numerical', 'integerOnly'=>true),
);
return array_merge(parent::rules(),$myRules);
}