Question

当我收到错误ErrorException（E_NOTICE）时，我试图使用laravel在mysql中写入数据尝试获取非对象的属性，我不知道该在哪里出现问题，请帮助我。

我的控制器代码是PublicationController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\publication;
use Auth;

class PublicationController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        //
        return view('publications');
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        //
        publications::create([
            'user_id' => Auth::user()->id,
            'title' => request('title'),
            'status' => request('status'),
            'year' => request('research_area')
        ]);
        return 'inserted';
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function show($id)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function destroy($id)
    {
        //
    }
}

为模型代码提供了publication.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class publication extends Model
{
    //
    protected $fillable = ['title','status','year'];
}

给出了我的路线代码。

<?php

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function () {
    return view('welcome');
});

Auth::routes();

Route::get('/home', 'HomeController@index')->name('home');

Route::get('education', 'EducationController@index');
Route::post('edu', 'EducationController@store');

Route::get('publications','PublicationController@index');
Route::post('pub','PublicationController@store');

错误被赋予类ErrorException（E_NOTICE）尝试获取非对象的属性，如果有人知道问题出在哪里，请提供帮助

Answer 1

考虑将PublicationController放在身份验证中间件后面：

class PublicationController extends Controller
{
    ...
    public function __construct()
    {
        $this->middleware('auth');
    }
    ...
}

您还可以使用路由组：

Route::middleware(['auth'])->group(function () {
    // your routes
});

如果Auth::user()为空，那么Auth::user()->id会给您提到的异常。将路由或控制器放在中间件后面应该可以解决此问题。

修改

这假设您正在使用Laravel 5.6 https://laravel.com/docs/5.6。这应该适用于5.5和5.7。

Answer 2

最后，我仅在模型可填充的arry中包含“ user_id”，就找到了问题的答案，并且以上代码正常工作。

试图获取非对象ErrorException（E_NOTICE）的属性

2 个答案: