(1/1) FatalErrorException 在 laravel 5.4 中调用 null 上的成员函数 all()

Question

4 我在提交时有一个表单我想验证它的字段，当我提交表单时发生了什么

 (1/1) FatalErrorException

Call to a member function all() on null

这是我下面的代码

$validator = app('validator')->make($this->request->all(),[
            'postTitle' => 'required',
            'postContent' =>'required']);

在 laravel 5.2 中这个验证器运行良好，但在 laravel 5.4 中它返回 null 有人可以帮我弄清楚这件事吗？ 非常感谢任何帮助。 TIA

这是我的完整代码

<?php

namespace App\Repositories;
use App\Repositories\Contracts\addPostRepositoryInterface;
use Validator;
use Illuminate\Http\Request;

use DB;
use Session;
use Hash;

class addPostRepository implements addPostRepositoryInterface{

    protected $request;

    // Intialize request instance
    public function __contruct(Request $request){
        $this->request = $request;
    }


    public function addPosts(Request $request){
        //validate posts
        echo "test";
        $validator = Validator::make($request->all(), [
            'postTitle' => 'required',
            'postContent' =>'required',
        ]);


        //if validation fails return error response
        if($validator->fails())
            return redirect()->route('get.addPost')->withErrors($validator)->withInput();

        try{


        }catch(\Exception $e){
            return redirect()->route('get.addPost')->withErrors(["error"=>"Could not add details! Please try again."])->withInput();
        }


    }


    public function postCreate($screen){
        switch($screen){
            case 'add':
            return $this->addPosts($screen);
            break;
        }
    }

    //getAddPost View
    public function getAddPost(){
        return view('addPost');
    }

}

Answer 1

似乎是方法注入（在构造函数中）或其他问题。

您可以尝试在 local(addPosts()) 函数上创建请求对象。 请尝试以下替代解决方案。

<?php

namespace App\Repositories;
use App\Repositories\Contracts\addPostRepositoryInterface;
use Validator;
use DB;
use Session;
use Hash;

class addPostRepository implements addPostRepositoryInterface{


public function addPosts(Request $request){
    //validate posts
    $reqeust = new \Illuminate\Http\Request;

    $validator = Validator::make($request->all(), [
        'postTitle' => 'required',
        'postContent' =>'required',
    ]);


    //if validation fails return error response
    if($validator->fails())
        return redirect()->route('get.addPost')->withErrors($validator)->withInput();

    try{


    }catch(\Exception $e){
        return redirect()->route('get.addPost')->withErrors(["error"=>"Could not add details! Please try again."])->withInput();
    }


}


public function postCreate($screen){
    switch($screen){
        case 'add':
        return $this->addPosts($screen);
        break;
    }
}

//getAddPost View
public function getAddPost(){
    return view('addPost');
}
// REST OF THE CODE GOES HERE...
}

Answer 2

根据您提供的信息，我将向您展示如何在 Laravel 5.4 中正确验证请求

public function store(Request $request)
{
    $validator = Validator::make($request->all(), [
        'postTitle' => 'required',
        'postContent' =>'required',
    ]);

    if ($validator->fails()) {
        return redirect('your.view')
                    ->withErrors($validator)
                    ->withInput();
    }

    // Store the blog post...
}

这将在任何需要的地方成功地为您验证请求。如果验证失败，您将被转发到您的视图并显示相应的错误。

确保use Validator; 在文件顶部。

欲了解更多信息，您可以阅读https://laravel.com/docs/5.4/validation