Yii Cgridview with duplicated column name from relational models - php

Question

I am using Cgridview to display results for "User" model with relation from "UserFlag" model.
"User" model -> tbl_user (id, name, password, flag)
"Flag" model -> tbl_userFlag (id, flag)
The id means the same from both models. However, the flags means differently (I can't modify the database so have to stick with it) and I need to display them on the same gridview.
The problem I encounter is that
the gridview can show both flags correctly but it fails and shows error when I try to sort and filter the flag from "User" model. (However sorting and filtering work fine for the flag from "UserFlag" model.)
How can I solve it?
The error log:
CDbCommand failed to prepare the SQL statement: SQLSTATE[HY000]: General error: 1 ambiguous column name: flag.
"User" model:
class User extends CActiveRecord
{
public function relations()
{
return array(
'FLAG' => array(self::HAS_ONE, 'UserFlag','id'),
);
}
public function search()
{
$criteria=new CDbCriteria;
$criteria->compare('id',$this->id);
$criteria->compare('name',$this->username,true);
$criteria->compare('password',$this->password,true);
$criteria->compare('flag',$this->flag,true);
$criteria->with = array(
'FLAG' => array(
'select' => 'FLAG.flag',
'together' => true,
)
);
$criteria->compare('FLAG.flag',$this->flagFromB,true);
return new CActiveDataProvider($this, array(
'criteria'=>$criteria,
'sort'=> array(
'attributes'=>array(
'flagFromB' => array(
'asc' => 'FLAG.flag',
'desc' => 'FLAG.flag DESC',
),
'*',
),
),
));
}
"UserFlag" model:
Link to table tbl_userFlag (id, flag)
"User" view:
$this->widget('zii.widgets.grid.CGridView', array(
'id'=>'user-grid',
'dataProvider'=>$model->search(),
'filter'=>$model,
'columns'=>array(
'id',
'username',
'password',
'email',
'flag',
array(
'name' => 'flagFromB',
'type' => 'raw',
'value' => '$data->FLAG->flag',
),
array(
'class'=>'CButtonColumn',
),
),
));

Answer 1

You can change your modal relationship.
User.php modal file.
<?php
class User extends CActiveRecord {
public function relations() {
return array(
'FLAG' => array(self::BELONGS_TO, 'UserFlag', 'id'),
);
}
public function search() {
$criteria = new CDbCriteria;
$criteria->compare('id', $this->id);
$criteria->compare('name', $this->username, true);
$criteria->compare('password', $this->password, true);
$criteria->compare('flag', $this->flag, true);
$criteria->with = array(
'FLAG' => array(
'select' => 'FLAG.flag',
'together' => true,
)
);
$criteria->compare('FLAG.flag', $this->flagFromB, true);
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
'sort' => array(
'attributes' => array(
'flagFromB' => array(
'asc' => 'FLAG.flag',
'desc' => 'FLAG.flag DESC',
),
'*',
),
),
));
}
}
?>
I hope it will help.