Question

如果我在db中有2个字段 - 概率和影响力，我需要在GridView中使用这两个字段相乘的列。我设法将它添加到那里：

    [
            'attribute' => 'priority',
            'format' => 'raw',
            'value' => function ($model) {
                return $model->influence * $model->probability;
            },
        ],

但无法处理排序，因为该列不在db中，并且向$ query添加过滤器只会导致错误。

    $query = Risks::find();
    $query->select(`probability*influence AS priority`);
    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);

已更新（使用Asc和Desc但不使用过滤器）

public function search($params)
{
    $query = Risks::find();

    $query->joinWith(['author', 'proj']);

    $query->select('*, (probability * influence) as priority');

    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);

    $dataProvider->setSort([
        'attributes' => [
           // 'id',
            'probability',
            'risks',
            'influence',
            'del' => [
                'asc' => ['risks.del' => SORT_ASC],
                'desc' => ['risks.del' => SORT_DESC],
            ],
            'priority' => [
                'asc' => ['priority' => SORT_ASC],
                'desc' => ['priority' => SORT_DESC],
                'label' => 'Priority',
            ],
            'proj' => [
                'asc' => ['projects.name' => SORT_ASC],
                'desc' => ['projects.name' => SORT_DESC],
            ],
            'author' => [
                'asc' => ['users.name' => SORT_ASC],
                'desc' => ['users.name' => SORT_DESC],
            ]
        ]
    ]);

    $this->load($params);

    if (!$this->validate()) {
        // uncomment the following line if you do not want to any records when validation fails
        // $query->where('0=1');
        return $dataProvider;
    }


    $query->andFilterWhere([
        'id' => $this->id,
        'proj_id' => $this->proj_id,
        'author_id' => $this->author_id,
        'influence' => $this->influence,
        'probability' => $this->probability,
        //'del' => $this->del,
    ])
        ->andFilterWhere(['like', 'projects.name', $this->proj])
        ->andFilterWhere(['like', 'users.name', $this->author]);

    $query->andFilterWhere(['like', 'risks', $this->risks]);

    $query->having('priority = '. $this->priority);
    //$query->having(['priority' => $this->priority]);

    return $dataProvider;
}

Answer 1

第1步：为您的基础Risks模型添加一个getter函数：

public function getPriority() {
    return ($this->probability * $this->influence);
}

第2步：向模型priority添加属性RisksSearch并配置规则。

/* your calculated attribute */
public $priority;

/* setup rules */
public function rules() {
   return [
       /* your other rules */
       [['priority'], 'safe']
   ];
}

第3步：编辑search（）方法以包含计算字段priority

public function search($params) {

    $query = Person::find();

    $query->select('*, (probability * influence) as priority');

    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);

    /**
     * Setup your sorting attributes
     * Note: This is setup before $this->load($params)
     */
    $dataProvider->setSort([
        'attributes' => [
            'id',
            'priority' => [
                'asc' => ['priority' => SORT_ASC],
                'desc' => ['priority' => SORT_DESC],
                'label' => 'Priority',
                'default' => SORT_ASC
            ],
        ]
    ]);
    ...

第4步：在$query->andFilterWhere()之后添加$this->load($params)，以便能够过滤计算字段

// use the operator you wish, i.e. '=', '>', '<' etc
$query->andFilterWhere(['=', '(probability * influence)', $this->priority]);

Answer 2

删除

      $query->select('*, (probability * influence) as priority');

改变

          'priority' => [
                'asc' => ['(probability * influence)' => SORT_ASC],
                'desc' => ['(probability * influence)' => SORT_DESC],
                'label' => 'Priority',
              ],

之后$ this-＆gt;加载（$ params）;

          $query->andFilterWhere(['=', '(probability * influence)', $this->priority]);

搜索按需运行！：）

感谢您的帮助！

Answer 3

这是我的解决方案，适用于对非表字段进行排序

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="16dp">

<ImageView
    android:id="@+id/img"
    android:layout_width="@dimen/_200sdp"
    android:layout_height="@dimen/_200sdp"
    android:layout_marginTop="16dp"
    android:src="@drawable/ic_launcher"
    app:layout_constraintBottom_toTopOf="@+id/btn1"
    app:layout_constraintEnd_toStartOf="@+id/right"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="@+id/left"
    app:layout_constraintTop_toTopOf="parent" />

<Button
    android:id="@+id/btn1"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="Button 1"
    app:layout_constraintBottom_toTopOf="@+id/btn2"
    app:layout_constraintEnd_toStartOf="@+id/right"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="@+id/left"
    app:layout_constraintTop_toBottomOf="@+id/img" />

<Button
    android:id="@+id/btn2"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="Button 2"
    app:layout_constraintBottom_toTopOf="@+id/txt_already_member"
    app:layout_constraintEnd_toStartOf="@+id/right"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="@+id/left"
    app:layout_constraintTop_toBottomOf="@+id/btn1" />

<TextView
    android:id="@+id/txt_already_member"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="20dp"
    android:text="Already Member? Sign In"
    android:textSize="16sp"
    app:layout_constraintBottom_toTopOf="@+id/divider"
    app:layout_constraintEnd_toStartOf="@+id/right"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="@+id/left"
    app:layout_constraintTop_toBottomOf="@+id/btn2" />

<TextView
    android:id="@+id/txt_agreement"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="24dp"
    android:text="By continuing you agree to our terms and privacy policy"
    android:textSize="12sp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/right"
    app:layout_constraintStart_toStartOf="@+id/left"
    app:layout_constraintTop_toTopOf="@+id/divider"
    app:layout_constraintVertical_bias="1.0" />

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/left"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_begin="@dimen/_16sdp" />

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/right"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_end="@dimen/_16sdp" />

<androidx.constraintlayout.widget.Guideline
    android:id="@+id/divider"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintGuide_percent="0.7"
    app:layout_constraintTop_toBottomOf="@+id/txt_already_member" />

在GridView Yii2中对数据进行排序和过滤，其中列不在数据库中

3 个答案: