注入Laravel 5.1& quot; Illuminate \ Http \ Request& quot;在您的自定义课程中? [英] Injecting Laravel 5.1 "Illuminate\Http\Request" in your custom classes?

问题描述

这是我简单的 App \ Libraries \ Gelocation.php 类，

namespace App\Libraries;

use Location;
use Illuminate\Http\Request;

class GeoLocation
{
    public function getLocationByIP($ip = null)
    {
        // If IP address is set
        if ($ip) {
            $location = Location::get($ip);
        } else {
            $location = Location::get();
        }

        // Get the location by city
        return $location->cityName;
    }

    public function getLocationByCoordinates($longitute, $latitude)
    {
        //
    }

    public function getLocation(Request $request)
    {
        // Check if the location is already set in the cookie
        if ($request->cookie('location')) {
            return $request->cookie('location');
        } else {
            $location = $this->getLocationByIP();

            // Set location in the cookie
            $request->cookie()->forever('location', $location);

            return $location;
        }
    }
}

我正在如下的 PagesController.php 控制器中使用此类，

I am using this class in my PagesController.php controller as follows,

namespace App\Http\Controllers;

use App\Libraries\GeoLocation;
use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;

class PagesController extends Controller
{
    public $location;

    public function __construct(GeoLocation $location)
    {
        $this->location = $location;
    }

    public function index()
    {
        dd($this->location->getLocation());
        return view('pages.index');
    }
}

但是，当我运行此代码时，出现此错误，

However, when I run this code I get this error,

GeoLocation.php第28行中的ErrorException:

ErrorException in GeoLocation.php line 28:

传递给App \ Libraries \ GeoLocation :: getLocation()的参数1必须为Illuminate \ Http \ Request的实例，未给出，在第22行的/var/www/blogs/app/Http/Controllers/PagesController.php和定义

Argument 1 passed to App\Libraries\GeoLocation::getLocation() must be an instance of Illuminate\Http\Request, none given, called in /var/www/blogs/app/Http/Controllers/PagesController.php on line 22 and defined

推荐答案

您只需要在Geolocation构造函数中注入 Request ，如下所示:

You simply need to inject Request in Geolocation constructor like so:

namespace App\Libraries;

use Location;
use Illuminate\Http\Request;

class GeoLocation
{   

   public function __construct(Request $request){
       $this->request = $request;
   }

    public function getLocationByIP($ip = null)
    {
        // If IP address is set
        if ($ip) {
            $location = Location::get($ip);
        } else {
            $location = Location::get();
        }

        // Get the location by city
        return $location->cityName;
    }

    public function getLocationByCoordinates($longitute, $latitude)
    {
        //
    }

    public function getLocation() //no need to inject here
    {
        // Check if the location is already set in the cookie
        if ($this->request->cookie('location')) {
            return $request->cookie('location');
        } else {
            $location = $this->getLocationByIP();

            // Set location in the cookie
            $request->cookie()->forever('location', $location);

            return $location;
        }
    }
}

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