Laravel 5，无法处理的实体422错误

Question

我正在尝试验证登录表单并在页面上显示错误。但是当我点击登录时，我收到422错误。

任何帮助都将不胜感激。

这是我的handleLogin函数，用于在单击登录按钮时处理进程。

public function handleLogin(Request $request){

    /* validate user */
   $this->validate($request, User::$login_validation_rules);

    $data = $request->only('email', 'password');
    if(\Auth::attempt($data)){
    return redirect()->route('home');
    }

return back()->withInput();
}

以下是routes.php

Route::get('/login', ['as' => 'login', 'uses' => 'LoginController@login']);
Route::post('/handleLogin', ['as' => 'handleLogin', 'uses' => 'LoginController@handleLogin']);
Route::get('/home', ['as' => 'home', 'uses' => 'UsersController@home']);
Route::get('/logout', ['as' => 'logout', 'uses' => 'LoginController@logout']);
Route::resource('users', 'UsersController', ['only' => ['create', 'store']]);

以下是登录表单。

@extends('master')

@section('content')

<h2> Login </h2>
@if(count($errors))
<div class="alert alert-danger">
    <ul>
        @foreach($errors->all() as $error)
            <li>{{ $error }}</li>
        @endforeach
    </ul>
</div>
@endif

    {!! Form::open(array('route' => 'handleLogin')) !!}
<div class="form-group">
    {!! Form::label('email') !!}
    {!! Form::text('email', null, array('class' => 'form-control')) !!}
</div>
<div class="form-group">
  {!! Form::label('password') !!}
  {!! Form::password('password', array('class' => 'form-control')) !!}
</div>
{!! Form::token() !!}
{!! Form::submit('Login', array('class' => 'btn btn-default')) !!}
{!! Form::close() !!}

@stop