如何在Eloquent ORM中处理MySQL的空间数据类型?这包括如何创建迁移,插入空间数据和执行空间查询。如果没有实际解决方案,是否有任何变通方法?
我之前实施的一种解决方法是在模型上有一个纬度和经度字段,具有以下验证(参见Validator类):
$rules = array('latitude' => 'required|numeric|between:-90,90',
'longitude'=>'required|numeric|between:-180,180',)
魔法出现在模型的启动方法中,该方法设置了空间点字段的正确值:
/**
* Boot method
* @return void
*/
public static function boot(){
parent::boot();
static::creating(function($eloquentModel){
if(isset($eloquentModel->latitude, $eloquentModel->longitude)){
$point = $eloquentModel->geoToPoint($eloquentModel->latitude, $eloquentModel->longitude);
$eloquentModel->setAttribute('location', DB::raw("GeomFromText('POINT(" . $point . ")')") );
}
});
static::updated(function($eloquentModel){
if(isset($eloquentModel->latitude, $eloquentModel->longitude)){
$point = $eloquentModel->geoToPoint($eloquentModel->latitude, $eloquentModel->longitude);
DB::statement("UPDATE " . $eloquentModel->getTable() . " SET location = GeomFromText('POINT(" . $point . ")') WHERE id = ". $eloquentModel->id);
}
});
}
关于迁移,就像@jhmilan所说,您可以始终使用Schema :: create和DB :: statement方法来自定义迁移。
Schema::create('locations', function($table){
$table->engine = "MYISAM";
$table->increments('id')->unsigned();
$table->decimal('latitude', 10, 8);
$table->decimal('longitude', 11, 8);
$table->timestamps();
});
/*Espatial Column*/
DB::statement('ALTER TABLE locations ADD location POINT NOT NULL' );
/*Espatial index (MYISAM only)*/
DB::statement( 'ALTER TABLE locations ADD SPATIAL INDEX index_point(location)' );
geoToPoint()
函数从哪里来的? - dbr可以使用https://github.com/grimzy/laravel-mysql-spatial。
你可以使用:
namespace App;
use Illuminate\Database\Eloquent\Model;
use Grimzy\LaravelMysqlSpatial\Eloquent\SpatialTrait;
/**
* @property \Grimzy\LaravelMysqlSpatial\Types\Point $location
*/
class Place extends Model
{
use SpatialTrait;
protected $fillable = [
'name',
];
protected $spatialFields = [
'location',
];
}
如果你想查询“位置”字段,可以使用以下命令:
要存储模型,您可以使用以下命令:
$place1 = new Place();
$place1->name = 'Empire State Building';
$place1->location = new Point(40.7484404, -73.9878441);
$place1->save();
要检索模型,你应该使用:
$place2 = Place::first();
$lat = $place2->location->getLat(); // 40.7484404
$lng = $place2->location->getLng(); // -73.9878441