Yii CDBCriteria Complex Join Query - php

Question

I have 3 tables:
bank
bank_details
bank_bank_details
Relation between them:
bank model:
public function relations() {
return array(
'bankBankDetails' => array(self::HAS_MANY, 'BankBankDetails', 'bank_id'),
);
}
bank_details model:
public function relations() {
return array(
'bankBankDetails' => array(self::HAS_MANY, 'BankBankDetails', 'bank_details_id'),
);
}
bank_bank_details model:
public function relations()
{
return array(
'bank' => array(self::BELONGS_TO, 'Bank', 'bank_id'),
'bankDetails' => array(self::BELONGS_TO, 'BankDetails', 'bank_details_id'),
);
}
I want to fetch bank details like bank_name, ifsc etc info in admin view of bank_details model.
The normal SQL query I have generated which works perfectly fine:
SELECT b.name
FROM bank b
LEFT JOIN bank_bank_details bbd ON bbd.bank_id = b.bank_id
LEFT JOIN bank_details bd ON bd.bank_details_id = bbd.bank_details_id
WHERE bd.bank_details_id = bbd.bank_details_id
LIMIT 0 , 30
Now I just wants to integrate this with Yii CDBCriteria but its not working for me. Please check the code below:
public function search() {
$criteria = new CDbCriteria;
// select b.name
// from bank b
// left join bank_bank_details bbd
// on bbd.bank_id = b.bank_id
// left join bank_details bd on bd.bank_details_id = bbd.bank_details_id
// WHERE bd.bank_details_id = bbd . bank_details_id;
$criteria->compare('bank_details_id', $this->bank_details_id);
$criteria->compare('first_holder_name', $this->first_holder_name, true);
$criteria->compare('nominee1', $this->nominee1, true);
$criteria->select = 'b.name';
$criteria->join = 'LEFT JOIN bank_bank_details bbd ON bbd.bank_id = b.bank_id ';
$criteria->join .= 'LEFT JOIN bank_details bd ON bd.bank_details_id = bbd.bank_details_id';
$criteria->condition = 'bd.bank_details_id = bbd.bank_details_id';
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
'pagination' => array(
'pageSize' => 10,
),
));
}
Error:
Error 500 Found
CDbCommand failed to execute the SQL statement: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'b.bank_id' in 'on clause'
Any help would be appreciated.

Answer 1

You need to set alias to your table like this:
$criteria->alias='b'; or use default alias "t" instead of "b"
read more at
http://www.yiiframework.com/doc/api/1.1/CDbCriteria#alias-detail

Answer 2

Try:
public function search() {
$criteria = new CDbCriteria;
$criteria->compare('bank_details_id', $this->bank_details_id);
$criteria->compare('first_holder_name', $this->first_holder_name, true);
$criteria->compare('nominee1', $this->nominee1, true);
$criteria->select = 'bank.name';
$criteria->with = array(
'bankBankDetails' => array('joinType'=>'LEFT JOIN'),
'bankBankDetails.bank' => array('joinType'=>'LEFT JOIN'),
);
$criteria->addCondition('t.bank_details_id = bankBankDetails.bank_details_id');
return new CActiveDataProvider($this, array(
'criteria' => $criteria,
'pagination' => array(
'pageSize' => 10,
),
));
}
Main table (which is in FROM) has alias t and after compare you already having some condition, than you need to add to existing, not rewrite
UPDATE
If you do query from model bank_details then the main table (in FROM) must be bank_details. Query will be:
SELECT b.name
FROM bank_details bd
LEFT JOIN bank_bank_details bbd ON bd.bank_details_id = bbd.bank_details_id
LEFT JOIN bank b bbd ON bbd.bank_id = b.bank_id
WHERE bd.bank_details_id = bbd.bank_details_id
LIMIT 0 , 30

Answer 3

here
$criteria->select = 'b.name';
You are selecting only bank name and no id is selected
Not sure with the yii format something like
$criteria->select = 'b.name,b.bank_id';
or
$criteria->select = array('b.name,b.bank_id');

Answer 4

As #Evgeniy mentioned, you will need to set the alias using $criteria->alias = 'b';
http://www.yiiframework.com/doc/api/1.1/CDbCriteria#alias-detail
You might also want to look into using CDbCriteria::with you can use this to select related models.
http://www.yiiframework.com/doc/api/1.1/CDbCriteria#with-detail
If you use the above, make sure you also use CDbCriteria::together correctly. To select all related models at once, set it to true;
http://www.yiiframework.com/doc/api/1.1/CDbCriteria#together-detail