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Let's say we have two models and relation between them:

This wiki has been updated on 21 May 2012 with the new MODEL METHOD. Please note that the old CONTROLLER METHOD has been removed from this document.

Almost all the information you need whilst working with yii is written in the Class Reference.

This tip created in conjunction with IRC #yii channel users emilsedgh and tydeas - thanks!

This is what I did. Its the EASIEST solution that I know of. I just reused the advanced search done in CGridView.

Here I suggest to list the most common questions you meet in the forum or freenode irc. Feel free to edit this wiki article, and add another question with answer

Scenarios are an extremely useful tool for separating validation tasks on any class you use derived from CModel. In this tutorial we will use CActiveRecord.

Since version 5.4 PHP can work as a simple webserver so you can develop Yii applications without installing Apache. That's how to use it:

This example uses a MySQL DB with a table named tree with the fields id, name, and parent_id. The parent_id will be NULL for root elements. The SQL is kept simple (no autoinc, no FK, etc).

The customary configuration of a Yii application includes just a single database section in the protected/config/main.php file, but it's easy to extend this to support more than one, tying each Model to one of the databases.