Question

我有一个Yii2 searchQuery设置，非常适合计算不在给定点所需半径范围内的记录。

public function search($params)
{
 $query = TrainerExtend::find();
 $dataProvider = new ActiveDataProvider([
     'query'      => $query,
     'pagination' => [
     'pageSize' => $this->pageSize,
     ],
 ]);
 $this->load($params);
 $query->having([
     '<',
     'ST_Distance_Sphere(POINT(' . $this->longitude . ',' . $this->latitude . '),
      PointFromText(CONCAT(\'POINT(\',longitude,\'\',latitude,\')\')))',
      $this->radius * 1000
 ]);
}
  $rows = $query->distinct();

    return $dataProvider;
}

public function actionFind()
{
    $searchModel = new TrainerSearch();
    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

    $trainers = $dataProvider->getModels();

    if (array_key_exists('trainerSearch',Yii::$app->request->queryParams)
        && !empty($trainerSearch = Yii::$app->request->queryParams['TrainerSearch']))
    {
        if (array_key_exists('specialties',$trainerSearch) && !empty($specialities = $trainerSearch['specialties']))
        {
            foreach ($trainers as $trainer) {
                $specialties = $trainer->trainerSpecialtiesArray;
                $trainer->match = $this->caluclateRelevance($specialties);
            }
        }
    }
    return $this->render('find', [
        'searchModel'  => $searchModel,
        'dataProvider' => $dataProvider,
    ]);
}

结果查询

   SELECT DISTINCT * FROM `trainer` WHERE `gender`='0' HAVING ST_Distance_Sphere(POINT(-123.3836214,48.418248899999995), PointFromText(CONCAT('POINT(',longitude,' ',latitude,')'))) < 59000 LIMIT 2`

结果记录是半径计算的结果，但我也需要geo函数计算的距离。我尝试过使用as关键字，但它一直在破坏查询。

Answer 1

对于计算列，您必须在查询中添加正确的选择代码

$query->->addSelect(["*",
         "ST_Distance_Sphere(POINT($this->longitude ,
          $this->latitude ), 
          PointFromText(CONCAT('POINT(',longitude,' ',latitude,')')))as distance"]);

然后显示结果

首先，您应该在模型中添加公共变量，例如：

  class TrainerExtend extends \yii\db\ActiveRecord
  {

      public $distance;  // codice  di stato del codice fiscale 
      ......

      public static function tableName()
      {
      ....

第二，您可以在视图中使用距离作为模型属性，例如：gridview

  <?= GridView::widget([
    'dataProvider' => $dataProvider,
     ......
    'columns' => [
        .....
        'distance', 
        ...

使用Yii2 Query从函数MySQL中返回一个值

1 个答案: