Setting Up Yii MANY_MANY Relationship - php

Question

I am trying to set up a MANY_MANY Relationship in Yii using Active Record.
I have three tables
profile
profile_id
profile_description
category
category_id
category_name
profile_category
profile_id
category_id
My models are Profile, Category, and ProfileCategory.
I am trying to run a query using the category_id that will pull up all of the profiles that are in that category.
This is the information in the category model.
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(
'profiles'=>array(
self::MANY_MANY,
'Profile',
'profile_category(category_id, profile_id)',
),
'profile_category'=>array(
self::HAS_MANY,
'ProfileCategory',
'category_id',
),
);
}
Profile Model
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(
'categories'=>array(
self::MANY_MANY,
'Category',
'profile_category(profile_id, category_id)'
),
'profileCategory'=>array(
self::HAS_MANY,
'ProfileCategory',
'profile_id'
),
);
}
ProfileCategory Model
public function relations()
{
return array(
'category'=>array(
self::BELONGS_TO,
'Category',
'category_id',
),
'profile'=>array(
self::BELONGS_TO,
'Profile',
'profile_id',
),
);
}
Controller
public function actionResults()
{
$category=$_POST['terms'];
$dataProvider=new CActiveDataProvider(
'Profile',
array(
'criteria'=>array(
'with'=>array('profile_category'),
'condition'=>'display=10 AND profile_category.category_id=1',
'order'=>'t.id DESC',
'together'=>true,
),
)
);
$this->render('results',array(
'dataProvider'=>$dataProvider,
));
}
View
<div id=resultsleft>
<?php
foreach($dataProvider as $value)
{
echo $value->profile_id;
}
?>
</div>
Any thoughts? Thank You! Nothing shows in the view.

Answer 1

You have to set up a property called profileCategory (not profile_category) in the profile model:
'profileCategory'=>array(
self::HAS_MANY,
'ProfileCategory',
'profile_id'
),
You can use it with an and condition as follows:
'criteria'=>array(
'with'=>array('profileCategory'),
'condition'=>'display=10 AND profileCategory.category_id=1',
'order'=>'t.id DESC',
'together'=>true,
),

Answer 2

It would be better for logical id first to model relation...
An example is available here.
Category model
'Profile', 'profile_category(profile_id, ...)'
public function relations()
{
return array(
'profiles'=>array(
self::MANY_MANY,
'Profile',
'profile_category(profile_id, category_id)'
),
'profile_category'=>array(
self::HAS_MANY,
'ProfileCategory',
'category_id',
),
);
}
Profile model
'Category', 'profile_category(category_id, ...)'
public function relations()
{
return array(
'categories'=>array(
self::MANY_MANY,
'Category',
'profile_category(category_id, profile_id)'
),
'profile_category'=>array(
self::HAS_MANY,
'ProfileCategory',
'profile_id'
),
);
}
Its actualy if model of database has
many self::BELONGS_TO and database has only PK (PrimaryKeys)
such code will be correctly executed
print_r(Profile::model()->findByPk(5)->categories);
print_r(Category::model()->findByPk(8)->profiles);