Eloquent 在第二次调用中复制绑定

Question

我在 Laravel 项目中使用 Reposity 模式。问题是我看到它在复制第二个调用查询中的绑定！

这是我的代码：

class AirController extends Controller
{
    private $airportService;

    public function __construct(AirportService $airportService) {
        $this->airportService = $airportService;
    }

    public function getAirports(){
        $departure_airport = $this->airportService->getCityFromAirport("6");
        $destiny_airport = $this->airportService->getCityFromAirport("10");
    }
}

调试，$departure_airport获取记录，$destiny_airport失败。你会认为id: 10有问题。没有。如果我先交换并放置 $destiny_airport，它会得到一条记录，但随后 $departure_airport 会失败。然后，我考虑按照建议 here 打印原始 SQL 查询。

这是结果:

INFO: "select * from `airports` where `airports`.`id` = ? limit 1"  
INFO: ["6"]  
INFO: "select * from `cities` where `cities`.`id` = ? limit 1"  
INFO: [441]  
*****************************************************************************************
INFO: "select * from `airports` where `airports`.`id` = ? and `airports`.`id` = ? limit 1"  
INFO: ["6","10"]

为什么在第三个查询中（在星号之后）复制带有参数 6 和 10 的列 "id" 而我在第二个查询中仅将 10 作为参数传递？！ 而不是第三个查询，我想这样：

INFO: "select * from `airports` where `airports`.`id` = ? limit 1"  
INFO: ["10"]

这是实现：

AirportService.php:

use App\Repositories\AirportRepository as Airport;

class AirportService {

    private $airport;

    public function __construct(Airport $airport){
        $this->airport = $airport;
    }

    public function getCityFromAirport($airportId){
        $airport = $this->airport->find($airportId);
        return $airport->City;
    }
}

Repository.php

...

public function find($id, $columns = array('*')) {
    return $this->model->find($id, $columns);
}

...

我Repository.php

...

public function find($id, $columns = array('*'));

...

给出的错误是：

local.ERROR: Trying to get property of non-object {"userId":41,"email":"...@...","exception":"[object] (ErrorException(code: 0): Trying to get property of non-object at C:\wamp\www\project\API\app\Services\AirportService.php:21)

Answer 1

尝试在存储库的查找方法中调用 newModelInstance。

return $this->model->newModelInstance()->find($id, $columns);

Eloquent 在第二次调用中复制绑定

Eloquent duplicating bindings in the second call

php

binding

repository-pattern

laravel

eloquent