Example file generated by yii-app Gii model generator.

Reply.php

<?php

/** 
* This is the model class for table "reply". 
* 
* The followings are the available columns: 
* @property string $id
* @property string $threadId
* @property string $alias
* @property string $subject
* @property string $body
* @property integer $status
* 
* The followings are the available relations: 
* @property Thread $thread
*/ 
class Reply extends ActiveRecord
{ 
    /** 
    * Returns the static model of the specified AR class. 
    * @param string $className active record class name. 
    * @return Reply the static model class. 
    */ 
    public static function model($className = __CLASS__) 
    { 
        return parent::model($className); 
    } 

    /** 
    * @return string the associated database table name. 
    */ 
    public function tableName() 
    { 
        return 'reply'; 
    } 

    /** 
    * @return array the behavior configurations (name=>config). 
    */ 
    public function behaviors() 
    { 
        return array_merge(parent::rules(), array( 
        )); 
    } 

    /** 
    * @return array validation rules for model attributes. 
    */ 
    public function rules() 
    { 
        return array_merge(parent::rules(), array( 
            array('threadId, alias, body, status', 'required'),
            array('status', 'numerical', 'integerOnly'=>true),
            array('threadId', 'length', 'max'=>10),
            array('alias, subject', 'length', 'max'=>255),
            // The following rule is used by search(). 
            array('id, threadId, alias, subject, body, status', 'safe', 'on' => 'search'), 
        )); 
    } 

    /** 
    * @return array relational rules. 
    */ 
    public function relations() 
    { 
        return array_merge(parent::relations(), array( 
            'thread' => array(self::BELONGS_TO, 'Thread', 'threadId'),
        )); 
    } 

    /** 
    * @return array customized attribute labels (name=>label). 
    */ 
    public function attributeLabels() 
    { 
        return array_merge(parent::attributeLabels(), array( 
            'id' => t('label', 'ID'),
            'threadId' => t('label', 'Thread'),
            'alias' => t('label', 'Alias'),
            'subject' => t('label', 'Subject'),
            'body' => t('label', 'Body'),
            'status' => t('label', 'Status'),
        )); 
    } 

    /** 
    * Retrieves a list of models based on the current search/filter conditions. 
    * @return CActiveDataProvider the data provider. 
    */ 
    public function search() 
    { 
        $criteria=new CDbCriteria; 

        $criteria->compare('id',$this->id,true);
        $criteria->compare('threadId',$this->threadId,true);
        $criteria->compare('alias',$this->alias,true);
        $criteria->compare('subject',$this->subject,true);
        $criteria->compare('body',$this->body,true);
        $criteria->compare('status',$this->status);

        return new CActiveDataProvider($this, array( 
            'criteria' => $criteria, 
        )); 
    } 
}