对GridView Yii2中列不在数据库中的数据进行排序和筛选 - Sort and filter data in GridView Yii2 where column is not in database

如果我在db-probability和impact中有两个字段，并且我需要在GridView中有一列，将这两个字段相乘。我设法把它添加到那里，就像：

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

但无法处理排序，因为该列不在数据库中，并且向$query添加筛选器只会导致错误。

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

已更新（适用于Asc和Desc，但不适用于过滤器）

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;
}

步骤1：向基本Risks模型添加getter函数：

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

步骤2：将属性priority添加到模型RisksSearch并配置规则

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

步骤3：编辑search（）方法以包括计算字段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
            ],
        ]
    ]);
    ...

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

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

删除

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

更改

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

并且在$this->load（$params）之后；

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

根据需要进行搜索！：）

谢谢你的帮助！

这是我的解决方案，适用于对非表字段进行排序

     $dataProvider->sort->attributes['customer'] = [
        'asc' => ['customer' => SORT_ASC],
        'desc' => ['customer' => SORT_DESC],
    ];