如何在 Laravel 中检索具有 POINT 数据类型的 MySQL 记录？答案

【问题标题】：how to retrive records from MySQL with POINT datatype in Laravel?如何在 Laravel 中检索具有 POINT 数据类型的 MySQL 记录？
【发布时间】：2021-02-18 08:33:49
【问题描述】：

我的表中有location 列是POINT 数据类型，我正在尝试检索具有特定经度和纬度的位置，但每次尝试时我都会得到空集合。

迁移：

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateBranchesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('branches', function (Blueprint $table) {
            $table->id();
            $table->timestamps();
            $table->point('location');
            $table->spatialIndex('location');
            $table->foreignId('supplier_id')->constrained();
            $table->boolean('is_main')->default(false);
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('branches');
    }
}

型号：

<?php

namespace App\Models;

use App\Casts\PointCasting;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Grimzy\LaravelMysqlSpatial\Eloquent\SpatialTrait;

class Branch extends Model
{
    use HasFactory, SpatialTrait;

    protected $fillable = [
      'location',
      'supplier_id',
    ];

    protected $spatialFields = [
        'location'
    ];

    protected $casts = [
      'location' => PointCasting::class
    ];

PointCasting.php

<?php

namespace App\Casts;

use Grimzy\LaravelMysqlSpatial\Types\Point;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;

class PointCasting implements CastsAttributes
{
    /**
     * Cast the given value.
     *
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @param  string  $key
     * @param  mixed  $value
     * @param  array  $attributes
     * @return mixed
     */
    public function get($model, $key, $value, $attributes)
    {
      return [
          'Lat' => $value->getLat(),
          'Lng' =>$value->getLng()
      ];
    }

    /**
     * Prepare the given value for storage.
     *
     * @param  \Illuminate\Database\Eloquent\Model  $model
     * @param  string  $key
     * @param  array  $value
     * @param  array  $attributes
     * @return mixed
     */
    public function set($model, $key, $value, $attributes)
    {
        return new Point($value['lat'], $value['lon']);
    }
}

我试过了：

Branch::where('location', new Grimzy\LaravelMysqlSpatial\Types\Point(50.1, 40.01))->get();
Branch::where('location', new Grimzy\LaravelMysqlSpatial\Types\Point(40.01, 50.1))->get();
Branch::where('location', [50.01, 40.01])->get();
Branch::where('location', [40.01, 50.1])->get();

我使用的包是：grimzy/laravel-mysql-spatial

我试图检索的数据在那里，因为当我尝试使用 phpmyadmin 时，它会出现：

【问题讨论】：

标签： laravel eloquent laravel-8

【解决方案1】：

你可以使用SpatialTrait上的范围

它调用equals 还有很多其他范围可以帮助

可用范围：

distance($geometryColumn, $geometry, $distance)
distanceExcludingSelf($geometryColumn, $geometry, $distance)
distanceSphere($geometryColumn, $geometry, $distance)
distanceSphereExcludingSelf($geometryColumn, $geometry, $distance)
comparison($geometryColumn, $geometry, $relationship)
within($geometryColumn, $polygon)
crosses($geometryColumn, $geometry)
contains($geometryColumn, $geometry)
disjoint($geometryColumn, $geometry)
equals($geometryColumn, $geometry)
intersects($geometryColumn, $geometry)
overlaps($geometryColumn, $geometry)
doesTouch($geometryColumn, $geometry)
orderBySpatial($geometryColumn, $geometry, $orderFunction, $direction = 'asc')
orderByDistance($geometryColumn, $geometry, $direction = 'asc')
orderByDistanceSphere($geometryColumn, $geometry, $direction = 'asc')

请注意，MySQL 空间分析函数的行为和可用性在每个 MySQL 版本中有所不同（参见documentation）。

【讨论】：