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Often, when writing widgets or editing Yii code, it is unclear whether or not the code is following the MVC pattern.

When you are developing an webapp with Yii that will be using Oracle RDBMS you should take a look at these issues in which you may run into it.

In this simple example I'll demonstrate how to extend CActiveForm class to overload some drawing functions to achieve some commonly used fixes in forms.

As a follow-up from the How to upload a file using a model wiki entry that explains how to save a file to the filesystem, this article will do the same using a blob field in the database.

In order to be able to get from render or renderPartial to the view, from widget to widget class, from relations to model classes you need to install additional plugin called YiiStorm.

Often happens to have the need of change a part of the page with ajax.

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