Yii CGridView 之 SQL 语句

在CGridView里，有时候需要用到复杂的查询时，可用 CSqlDataProvider替换CActiveDataProvider，

CSqlDataProvider 可用复杂的查询语句，例子如下：

1.在控制器中：

    public function actionIndex()
    {
        $count = Yii::app()->db->createCommand(‘SELECT COUNT(*) FROM app_item‘)->queryScalar();
        $sql = ‘SELECT * FROM app_item‘;
        $dataProvider = new CSqlDataProvider($sql, array(
            ‘totalItemCount‘ => $count,//数量
            ‘sort‘ => array(
                ‘attributes‘ => array(
                    ‘name‘=>array(‘label‘=>‘名称‘),
                    ‘type‘=>array(‘label‘=>‘类型‘),
                    ‘data‘=>array(‘label‘=>‘数据‘)
                )
            ),
            ‘keyField‘=>‘name‘,//Yii 默认的主键是 id,而我的数据库默认的是 name,所以这里设定 name
            ‘pagination‘ => array(
                ‘pageSize‘ => 10
            ),
        ));
        $this->render(‘index‘,array(‘dataProvider‘=>$dataProvider));
    }

    //自定义函数，用于 type字段的解释
    public function get_type($data,$row){
        $type = $data["type"];
        if( $type == 1 ) {
            echo ‘权限‘;
        }elseif( $type == 2 ) {
            echo ‘角色‘;
        }elseif( $type == 0 ) {
            echo ‘任务‘;
        }
    }

2.在视图中

$this->widget(‘zii.widgets.grid.CGridView‘, array(
    ‘id‘=>‘app-item-grid‘,
    ‘dataProvider‘=>$dataProvider,
    ‘columns‘=>array(
        array(
            ‘id‘=>‘CheckBox‘,//输出复选框
            ‘class‘=>‘CCheckBoxColumn‘,
            ‘selectableRows‘ => ‘50‘,
        ),
        ‘name‘,//保持原样
        array(
            ‘name‘=>‘type‘,
            ‘type‘=>‘raw‘,
            ‘value‘=>array($this,‘get_type‘),   //get_type 是自定义的函数
            ‘htmlOptions‘=>array(‘width‘=>"100px"),   //设置样式
        ),
        array(
            ‘header‘=>‘附加字段‘,
            ‘value‘=>‘substr($data["name"],0,3)‘,//如果是 CActiveDataProvider 时用对象方式 $data->name
        ),
    ),
))

3.结果如下