Question

我有这个班级

<?php

namespace App\Models\Tables;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Query\Builder;
use Illuminate\Support\Facades\DB;

class ZipCode extends Model
{
    protected $table      = 'zip';
    public    $timestamps = false;
    protected $fillable   = [
        'latitude',
        'longitude',
    ];

    public static function radiusSearch($lat, $lng)
    {
        $circle_radius = 3959;
        $subQuery      = '(SELECT *, (' . $circle_radius . ' * acos(cos(radians(' . $lat . ')) * cos(radians(latitude)) * cos(radians(longitude) - radians(' . $lng . ')) + sin(radians(' . $lat . ')) * sin(radians(latitude)))) AS distance FROM zip) AS distances';

        $result = ZipCode::select('*')
            ->from(ZipCode::raw($subQuery))
            ->limit(20);

        var_dump($result);

        return $result;
    }
}

当我致电radiusSearch(...)时，我得到一个Illuminate\Database\Eloquent\Builder对象，而不是实际结果

$result->get()不起作用，我得到Object of class Illuminate\Database\Eloquent\Builder could not be converted to string

这个通用查询工作得很好ZipCode::where('zip', '11111')->get()而不是上面的

有什么想法吗？

编辑：$result返回如下内容：

object(Illuminate\Database\Eloquent\Builder)[170]
  protected 'query' => 
    object(Illuminate\Database\Query\Builder)[164]
      public 'connection' => 
        object(Illuminate\Database\MySqlConnection)[166]
          protected 'pdo' => 
            object(PDO)[175]
            ...
  protected 'model' => 
    object(App\Models\Tables\ZipCode)[171]
      protected 'table' => string 'zip' (length=9)
      public 'timestamps' => boolean false
      ...

如果我$result->getModel()->get()->toArray()，则返回表格中的所有结果

Answer 1

您已经看过代码

$result = ZipCode::select('*')
        ->from(ZipCode::raw($subQuery))
        ->limit(20);

将返回代表您查询的Builder对象。您需要调用 - ＆gt; get（）让构建器实际执行您的查询并返回结果

$result = ZipCode::select('*')
        ->from(ZipCode::raw($subQuery))
        ->limit(20)->get();

Answer 2

以下是我根据其他社区答案提出的解决方案

public static function getClosestCities($lat, $lng, $city, $distance = 20, $limit = 20)
{
    $coordinates = ['latitude' => $lat, 'longitude' => $lng];
    $cares       = self::scopeIsWithinMaxDistance(ZipCode::raw('select *'), $coordinates, $distance, $city)->limit($limit)->get();

    return $cares ? $cares->toArray() : null;
}


public static function scopeIsWithinMaxDistance($query, $coordinates, $radius = 5, $city)
{
    $haversine = "(3961 * acos(cos(radians(" . $coordinates['latitude'] . ")) 
                * cos(radians(`latitude`)) 
                * cos(radians(`longitude`) 
                - radians(" . $coordinates['longitude'] . ")) 
                + sin(radians(" . $coordinates['latitude'] . ")) 
                * sin(radians(`latitude`))))";

    return $query->select('*')
        ->selectRaw("{$haversine} AS distance")
        ->orderByRaw("{$haversine} asc")
        ->whereRaw("{$haversine} < ?", [$radius])
        ->groupBy("city");
}

如何使用Laravel Eloquent选择返回数组？

2 个答案: