Trying to get property of non-object ErrorException (E_NOTICE) - mysql

Question

I am trying to isert data in mysql using laravel, while I am getting the error ErrorException (E_NOTICE)
Trying to get property of non-object, where is the problem I dont know please help me.
my controller code is 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)
{
//
}
}
While model code is given publication.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class publication extends Model
{
//
protected $fillable = ['title','status','year'];
}
The code of my route is given.
<?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');
The error is given Class ErrorException (E_NOTICE)
Trying to get property of non-object please help if any one know where is the problem

Answer 1

Consider placing PublicationController behind authentication middleware:
class PublicationController extends Controller
{
...
public function __construct()
{
$this->middleware('auth');
}
...
}
You can also use route groups:
Route::middleware(['auth'])->group(function () {
// your routes
});
If Auth::user() is null then Auth::user()->id will give you the exception you mentioned. Placing the routes or controller behind the middleware should solve this.
Edit
This assumes you are using Laravel 5.6 https://laravel.com/docs/5.6. This should work for 5.5 and 5.7.

Answer 2

Finally I found the answer of my question by just including 'user_id' in my model fillable arry and the above code works properly.

Answer 3

İ think you are not logged in so you get error when you try to get Auth::user()-id
Add this contractor to your class i think it should work for you
public function __construct(){
$this->middleware('auth');
}