This page summarizes the main new features introduced in each Yii release.
Added CActiveForm which simplifies writing form-related code and supports seamless and consistent validation on both client and server sides.
Refactored the code generated by the yiic tool. In particular, the skeleton application is now generated with multiple layouts; the operation menu is reorganized for CRUD pages; added search and filtering feature to the admin page generated by crud command; used CActiveForm to render a form.
Improved the way of declaring safe model attributes. See Securing Attribute Assignments.
Changed the default eager loading algorithm for relational active record queries so that all tables are joined in one single SQL statement.
Changed the default table alias to be the name of active record relations.
Added a whole set of new extensions known as the Zii library.
The alias name for the primary table in an AR query is fixed to be 't'
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