Question

模型搜索方法

  $criteria->alias = 'c';
  $criteria->select = 'c.*,max(ca.date) AS lastactivity';
  $criteria->join = 'LEFT JOIN tbl_contact_action AS ca ON (ca.contact_id=c.contact_id)';
  $criteria->condition = 'c.status<>"Deleted"';
  $criteria->group = 'c.contact_id';
  $criteria->order = 'lastactivity DESC';

$sort = new CSort;
        $sort->defaultOrder = array('lastactivity' => CSort::SORT_DESC); //'name ASC';        
        $sort->attributes = array(
            'name' => 'name',
            'email' => 'email',
            'status' => 'status',
            'createdon' => 'createdon',
            'lastactivity' => 'lastactivity',
        );
        $sort->applyOrder($criteria);
        return new CActiveDataProvider($this, array(
            'criteria' => $criteria,
            'sort' => $sort,            
        ));

基本上，我有一个1：n的关系，我只需要来自子表的最新记录。将根据子表中最新完成的注释显示父表数据。如何使这个字段可以排序？

错误

CDbCommand无法执行SQL语句：SQLSTATE [42S22]：找不到列：1054'order clause'中的未知列'c.lastactivity'。

Answer 1

只是一个理论：因为你有一个连接在一起的sql，所有数据将在1个结果中。我不确定您是否仍然可以使用$ data-＆gt; ca-＆gt; date，因为您的数据不是已知的活动记录类型。

尝试放

$criteria->select = 'maintable.*,ca.date as ca_date';

然后你应该可以使用

       array(
          'header' => 'Last Activity',
          'class' => 'gridDataColumn',
          'value' => '$data->ca_date',                           
       ),

Answer 2

下面是模型，它将允许具有SORTABLE的自定义/计算字段。而不是简单地写下最后活动＆＃39; =＆gt;＆＃39; lastactivity＆＃39;在排序数组中，传递整个数组对我来说很有用。希望它可以帮助某人：）

类联系人扩展了CActiveRecord {

public $verifyCode;
public $lastactivity;

public static function model($className = __CLASS__) {
    return parent::model($className);
}

public function tableName() {
    return '{{contact}}';
}

public function rules() {
    return array(
        array('name, email, subject, message', 'required', 'message' => Yii::t('app', 'MSG_ATTRIBUTE_BLANK')),
        array('email', 'email'),
        array('verifyCode', 'CaptchaExtendedValidator', 'allowEmpty' => !CCaptcha::checkRequirements(), 'on' => 'fContact'),
        array('name, email,subject,message,lastactivity', 'safe', 'on' => 'search'),
        array('name, subject, email, message, status,createdon,updatedon,verifyCode,lastactivity', 'safe'),
    );
}

public function relations() {
    return array(
        'ca' => array(self::HAS_MANY, 'ContactAction', 'contact_id'),               
    );
}

public function search() {

    $criteria = new CDbCriteria;
    $criteria->compare('name', CommonFunctions::escapeOperator($this->name), true, 'OR');
    $criteria->compare('subject', CommonFunctions::escapeOperator($this->subject), true, 'OR');
    $criteria->compare('email', CommonFunctions::escapeOperator($this->email), true, 'OR');
    $criteria->compare('status', CommonFunctions::escapeOperator($this->status), true,'OR');

    $lastactivity_sql = '(select max(date) from tbl_contact_action ca where ca.contact_id=t.contact_id)';
    $criteria->select = array('*', $lastactivity_sql . ' as lastactivity');
    $criteria->addCondition('status<>"Deleted"');
    $criteria->compare($lastactivity_sql, $this->lastactivity);
    $sort = new CSort;
    $sort->defaultOrder = array('lastactivity' => CSort::SORT_DESC); //'title ASC';
    $sort->attributes = array(
        'name' => 'name',
        'email' => 'email',
        'status' => 'status',
        'createdon' => 'createdon',
        'lastactivity' => array(
            'asc' => 'lastactivity ASC',
            'desc' => 'lastactivity DESC',
        ),
    );
    $sort->applyOrder($criteria);
    return new CActiveDataProvider($this, array(
        'criteria' => $criteria,
        'sort' => $sort,
        'pagination' => array(
            'pageSize' => Yii::app()->user->getState('contactPageSize', Yii::app()->params['RECORDPERPAGE_ADMIN']),
            'currentPage' => Yii::app()->user->getState('Contact_page', 0),
        ),
    ));

}

}

Yii - 在CDbCriteria中使用CActiveDataProvider中的连接查询时排序错误

2 个答案: