Yii Interview Questions and Answers
Ques 26. Explain Yii's DAO (Data Access Objects).
Yii's DAO provides a low-level database access layer for executing SQL queries and accessing database data without using ActiveRecord.
Example:
// $command = Yii::app()->db->createCommand($sql); $result = $command->queryAll();
Ques 27. What is Yii's CActiveRecord find() method used for?
The find() method in CActiveRecord is used to retrieve a single record based on the specified conditions.
Example:
// $post = Post::model()->find('status=:status', array(':status'=>1));
Ques 28. Explain Yii's dynamic form validation.
Dynamic form validation in Yii allows you to define validation rules in the model based on specific conditions, providing flexibility in validation logic.
Example:
// public function rules() { if ($this->scenario == 'scenario1') { return array('field1', 'required'); } }
Ques 29. How to handle user sessions in Yii?
Yii handles user sessions by using the 'session' component. You can configure session parameters in the application configuration.
Example:
// 'components' => array('session' => array('timeout' => 1440))
Ques 30. Explain Yii's migration command options.
Yii's migration command provides options like 'up', 'down', 'create', and 'history', allowing you to perform actions such as migrating up or down, creating a new migration, and viewing migration history.
Example:
// $ yii migrate/up
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