Creating relations from a behavior

Archives Yii 1.0.x Discussions
1

I was wondering if an active record behaviour could add relations on the fly?

pieter

2

Yes, it can (not documented though.)

In the behavior, you first need to retrieve the meta information of the AR model using:

$this->owner->metaData

You can create a new instance of CActiveRelation (its child class) and add it to the meta data's relations array.

3

Can you give an example when I want to use it in Controller? Thanks

4 

    public function localized($lang=null)

    {

        $obj = $this->Owner;


        $class = ActiveRecord::HAS_ONE;


        $obj->getMetaData()->relations['localized'] =

            new $class('localized',

                $this->getLangClassName(),

                $this->getLangForeignKey(),

                array(

                    'condition' => sprintf("`localized`.`%s`='%s'", $this->langField, $lang),

                )

            );


        return $obj->with('localized');

    }

localized method is behavior public method, and it’s scope name for model

5

This is very interesting.

e.g., in symfony there is a commentable behavior, every record can have comments stored in a relation. Can anyone show, how to organize and package such a behavior with models, views and widgets?