在Yii中处理关系ActiveRecord的最佳方法

Question

I'm quite confused with the different ways of "acquiring" data from my database using ActiveRecords. For this specific problem I don't know wether I should use model->findAll(), criteria (which would allow using pagination), or plain SQL if necessary (given that I need to display the output in a GridView).

What I'm trying to do here is list all the companies in my table 'company' and how much money has each of them payed. Payments are registered in the table 'transaction', which has the field 'value' representing the amount of money.

So, if I had to use a SQL query, it would be something like:

SELECT * 
FROM company 
LEFT OUTER JOIN transaction 
    ON company.id = transaction.company 
GROUP BY value

In short, what is the easiest way to achieve this? Thank you.

Answer 1

code for dataprovider

$dataProvider=new CActiveDataProvider('Company', array(
    'criteria'=>array(
        'with'=>array('transaction'),
        'group' = 't.value'
    ),
    'pagination'=>array(
        'pageSize'=>20,
    ),
));