Question

I recently started a project using Yii and I’m trying to get used to the query builder. Now, I want to make a query using joins and access the joining tables’ data in the query but I haven’t been able to get the following to work:

My (simplified) db-tables:

customer(#id, name)

employee(#id, name)

customer_employee(#customerid, #employeeid)

accounting(#id, customerid, started_date, finished_date, month, year)

• many-to-many relation between customer and employee
• one-to-many relation between customer and accounting

I want to execute the following query, which would select all the customers associated with a certain employee and display their accounting status (started_date & finished_date) if applicable (otherwise null).

The following query works perfectly, it’s just that I can’t get it to work with the cdbcriteria and Yii query builder: (also, hardcoded id is just for this example)

SELECT name, started_date, finished_date
FROM customer
RIGHT JOIN customer_employee ON customer.id=customer_employee.customerid
LEFT JOIN accounting ON customer.id=accounting.customerid
WHERE customer_employee.employeeid=2';

Please help!

Answer 1

1.
createCommand

Yii::app()->db->createCommand()
  ->select('name, started_date, finished_date')
  ->from('customer c')
  ->rightJoin('customer_employee ce', 'c.id=ce.customerid')
  ->leftJoin('accounting a', 'c.id=a.customerid')
  ->where('ce.employeeid=:id', array(':id'=>2))
  ->queryRow();

2.
CdbCriteria

$criteria = new CDbCriteria;
$criteria->select    = 'name, started_date, finished_date';
$criteria->join      = 'RIGHT JOIN customer_employee ON customer.id=customer_employee.customerid ';
$criteria->join     .= 'LEFT JOIN accounting ON customer.id=accounting.customerid';
$criteria->condition = 'customer_employee.employeeid=:id';
$criteria->params    = array(':id'=>2);

$customers = Customers::model()->find($criteria);

*.
don’t forget the rules: http://www.yiiframework.com/doc/guide/1.1/en/database.arr

I didn’t tested your SQLs, but if worked for you, these should, also work in Yii.