情境要求：
要在訂單（Order）視圖的gridview中顯示出客戶（Customer）姓名，并使其具有與其它字段相同的排序和搜索功能。
數(shù)據(jù)庫結(jié)構(gòu)
訂單表order含有字段customer_id 與 客戶表customer的id字段關(guān)聯(lián)
首先確保在Order Model中包含以下代碼：
public function getCustomer(){ return $this->hasOne(Customer::className(), ['id' => 'customer_id']);}用gii會(huì)自動(dòng)生成此代碼；
第一步：
在OrderSearch添加一個(gè)$customer_name變量
class OrderSearch extends Order{ public $customer_name; //<=====就是加在這里}第二步：
修改OrderSearch中的search函數(shù)
public function search($params){ $query = Order::find(); $query->joinWith(['customer']);<=====加入這句 $dataProvider = new ActiveDataProvider([ 'query' => $query, ]); $dataProvider->setSort([ 'attributes' => [ /* 其它字段不要?jiǎng)?*/ /* 下面這段是加入的 */ /*=============*/ 'customer_name' => [ 'asc' => ['customer.customer_name' => SORT_ASC], 'desc' => ['customer.customer_name' => SORT_DESC], 'label' => 'Customer Name' ], /*=============*/ ] ]); if (!($this->load($params) && $this->validate())) { return $dataProvider; } $query->andFilterWhere([ 'id' => $this->id, 'user_id' => $this->user_id, 'customer_id' => $this->customer_id, 'order_time' => $this->order_time, 'pay_time' => $this->pay_time, ]); $query->andFilterWhere(['like', 'status', $this->status]); $query->andFilterWhere(['like', 'customer.customer_name', $this->customer_name]) ;//<=====加入這句 return $dataProvider;}第三步：
修改order/index視圖的gridview
<?= GridView::widget([ 'dataProvider' => $dataProvider, 'filterModel' => $searchModel, 'columns' => [ ['class' => 'yii/grid/SerialColumn'], 'id', 'customer_id', 'status', ['label'=>'客戶', 'attribute' => 'customer_name', 'value' => 'customer.customer_name' ],//<=====加入這句 ['class' => 'yii/grid/ActionColumn'], ],]); ?>
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