if（Model中有个属性叫abc）怎么写 [ 新手入门 ]

$model = new Model();
if(isset($model->abc))
{
……
}

hasAttribute

二楼。。。。。。顶

最常用的就是二楼的方法了。

没有起效，为什么没有起效呢？每次 isset($model->During) 都是返回 false，即 $model->During=date('Y-m-01',strtotime('-5 month'))没有执行，这是为什么呢？
我的controller

public function actionAdmin()
{
    $model=new Test('search');
    $model->unsetAttributes();  // clear any default values
		
    if(isset($model->During))
        $model->During=date('Y-m-01',strtotime('-5 month'));
		
    if(isset($_GET['Test']))
        $model->attributes=$_GET['Test'];

    $this->render('admin',array(
        'model'=>$model,
    ));
}

我的model

<?php

/**
 * This is the model class for table "Test".
 *
 * The followings are the available columns in table 'Test':
 * @property integer $a
 * @property string $depOrProfitName
 * @property string $During
 */
class Test extends CActiveRecord
{
	/**
	 * Returns the static model of the specified AR class.
	 * @param string $className active record class name.
	 * @return Test the static model class
	 */
	public static function model($className=__CLASS__)
	{
		return parent::model($className);
	}

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

	/**
	 * @return array validation rules for model attributes.
	 */
	public function rules()
	{
		// NOTE: you should only define rules for those attributes that
		// will receive user inputs.
		return array(
			array('depOrProfitName', 'length', 'max'=>500),
			array('During', 'safe'),
			// The following rule is used by search().
			// Please remove those attributes that should not be searched.
			array('a, depOrProfitName, During', 'safe', 'on'=>'search'),
		);
	}

	/**
	 * @return array relational rules.
	 */
	public function relations()
	{
		// NOTE: you may need to adjust the relation name and the related
		// class name for the relations automatically generated below.
		return array(
		);
	}

	/**
	 * @return array customized attribute labels (name=>label)
	 */
	public function attributeLabels()
	{
		return array(
			'a' => 'A',
			'depOrProfitName' => 'Dep Or Profit Name',
			'During' => 'During',
		);
	}

	/**
	 * Retrieves a list of models based on the current search/filter conditions.
	 * @return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
	 */
	public function search()
	{
		// Warning: Please modify the following code to remove attributes that
		// should not be searched.

		$criteria=new CDbCriteria;

		$criteria->compare('a',$this->a);
		$criteria->compare('depOrProfitName',$this->depOrProfitName,true);
		$criteria->compare('During',$this->During,true);

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

呵呵，首先

if(isset($model->During))
    $model->During=date('Y-m-01',strtotime('-5 month'));

这段代码 if里返回为false了，if 中的代码肯定不会执行，
其次，$model->During=date('Y-m-01',strtotime('-5 month')); 想给属性附值，属性必须声明。

你可以这样写：

if(!$model->hasAttribute('During'))
{
    $value = date('Y-m-01',strtotime('-5 month'));
    $model-> setAttribute('During',$value);
}

应该去掉其中的 !号，改为

if($model->hasAttribute('During'))
{
    .....
}

就OK 了，只要数据库表中有这个During字段，就会用During去过滤。没有During字段，也不会出问题。 我要的就是这种效果。

噢，那我理解错你的意思了，呵呵

hasAttribute
getAttribute
setAttribute

都是AR的方法。得记下来。