由于使用POINT数据，在响应查询时出现了意外的valueexception

我想在我的项目中为纬度和经度添加一个POINT字段，我发现了这个教程，我模仿以确保它是工作的，但我被卡在为什么这个错误现在发生:

UnexpectedValueException in Response.php line 403:
The Response content must be a string or object implementing __toString(), "boolean" given.

如果我退出点字段的变化不发生，我得到的JSON数据，允许我使用谷歌地图地理编码的地址，而不是纬度和经度数据。

端点操作看起来像这样，它只在没有POINT数据的情况下工作:

public function rentals($id)
{
    // Retrieve all rentals within a region and the locations spatial data
    $rentals = DB::table('rentals')
                 ->join('regions', 'rentals.region_id', '=', 'regions.id')
                 ->join('rental_locations', 'rentals.rental_location_id', '=', 'rental_locations.id')
                 ->where('rentals.region_id', '=', $id)
                 ->select('*')
                 ->get();
    // Create a collection from the array of query results
    $rentals = collect($rentals);
    // Group all rentals by location
    $rentals = $rentals->groupBy('rental_location_id');
    $data = [ 'rentals' => $rentals ];
    return response()->json([
        'data' => $data
    ]);
}

访问器和mutator本质上与教程相同，但我将位置字段名称更改为latitude_longitude:

public function setLatitudeLongitudeAttribute($value)
{
    $this->attributes[ 'latitude_longitude' ] = DB::raw("POINT($value)");
}
public function getLatitudeLongitudeAttribute($value)
{
    $location = substr($value, 6);
    $location = preg_replace('/[ ,]+/', ',', $location, 1);
    return substr($location, 0, -1);
}

租赁地点的迁移

public function up()
{
    Schema::create('rental_locations', function (Blueprint $table) {
        $table->increments('id');
        $table->string('street_address', 100);
        $table->string('city', 50);
        $table->string('province', 50);
        $table->string('country', 50);
        $table->string('postal_code', 10);
        $table->timestamps();
    });
    // Laravel's schema creation doesn't support geographic data - July 2015 Laravel version 5.1
    DB::statement('ALTER TABLE rental_locations ADD latitude_longitude POINT');
}

租用地点种子

protected $rentalLocations = [
    [
        'street_address' => '707 Johnson St.',
        'postal_code' => 'V8W 1M8',
        'latitude_longitude' => '48.4271731,-123.3644049'
    ],
    ...
];
public function run()
{
    // Rentals situated within available regions used during development
    foreach ($this->rentalLocations as $rentalLocation) {
        // Rental locations used during development
        factory(App'RentalLocation::class, 1)->create($rentalLocation);
    }
}

工厂租赁地点

$factory->define(Parkable'RentalLocation::class, function ($faker) {
    return [
        'street_address' => '',
        'city' => 'Victoria',
        'province' => 'British Columbia',
        'country' => 'Canada',
        'postal_code' => '',
        'latitude_longitude' => ''
    ];
});

，我使latitude_longitude在RentalLocation模型中可填充。

我尝试按照laracast论坛上的建议将所有参数添加到响应中，以防它是UTF-8问题，但这并没有改变任何东西:

return response()->json(['data' => $data], 200, [], JSON_UNESCAPED_UNICODE);