How To Build Relations To Display Columns Of 4 Tables In Cgridview - php

Question

I have a requirement where I need to build the relations between more than 3 tables.
I have 4 tables namely, Message, Flat, Person, Mapping tables.
Now, below tables have the following fields:
Message:
`Id` int(11) NOT NULL AUTO_INCREMENT,
`Mapid` int(11) DEFAULT NULL,
PRIMARY KEY (`Id`),
KEY `FK41715B218022FC0` (`MapId`)
Mapping
`Id` int(11) NOT NULL AUTO_INCREMENT,
`FlatId` int(11) DEFAULT NULL,
PRIMARY KEY (`Id`),
KEY `FKE2B3C68A24F94F50` (`FlatId`),
Flat
`Id` int(11) NOT NULL AUTO_INCREMENT,
`PersonId` int(11) DEFAULT NULL,
PRIMARY KEY (`Id`),
KEY `FK2FFF79122B94A6` (`PersonId`),
Person
`Id` int(11) NOT NULL AUTO_INCREMENT,
`Name` varchar(255) DEFAULT NULL,
`FlatId` int(11) DEFAULT NULL,
`Phone` varchar(255) DEFAULT NULL,
PRIMARY KEY (`Id`),
KEY `FKC4E39B55AF5432C` (`FlatId`),
Now, I have to build relations in such a way that in the Cgridview(admin.php) of Message, i should display PersonId of flat table and Name and Phone of Person table along with the columns of Message table.
I have defined relations like this in model class of message(message.php)
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(
'mapping' => array(self::BELONGS_TO, 'Mapping', 'MapId'),
'flat'=>array(self::HAS_ONE,'Flat',array('FlatId'=>'Id'),'through'=>'mapping'),
'person'=>array(self::HAS_ONE,'Person',array('PersonId'=>'Id'),'through'=>'flat'),
);
}
Can anyone explain me the step by step procedure to display the columns of person table in message gridview.

Answer 1

With assuming you can create dataProvider for the CGridView:
<?php
$this->widget('zii.widgets.grid.CGridView',array(
'id'=>'message-grid',
'dataProvider'=>$yourDataProvider //such as $model->search();
'filter'=>$model,
'columns'=>array(
'Id',
'Mapid',
'person.name',
'person.FlatId',
'person.Phone',
));
?>

Answer 2

You can pass a DataProvider to the view and use it in CgridView widget or use a 'search()' action from $model.
You can personalize the relation columns like this:
<?php
$this->widget('zii.widgets.grid.CGridView',array(
'id'=>'messagePerson-grid',
'dataProvider'=>$model->search(),
'filter'=>$model,
'columns'=>array(
'Id',
'Mapid',
array(
'header'=>'Person Name', // Personalize column name
'value'=>'$data->flat->person->Name',
'htmlOptions'=>array('style'=>'width:10%;'), // Personalize html attributes
),
'flat.person.FlatId', // Or directly with default relation name.
'flat.person.Phone',
));
?>