Call to undefined relationship [user_id] on model [App\User] - php

Question

I'm trying Laravel 5.4 (i usually work with 5.1) and im actually copypasting most of the code, so i dont understand what is the trouble, maybe is because there is a better way to do it but yeah, its been 1 hour and i cant get past this;
Hope you can help me with this..
In case this isn't enough i'll be posting my views and routes. Thank to everyone.
This is my Model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
protected $fillable = ['user_id', 'user_name', 'user_birthday'];
public static $rules = [
'user_name' => 'required|max:255',
'user_birthday' => 'required'
];
public $timestamps = false;
}
Controller:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\User;
class UsersController extends Controller
{
public function index()
{
$users = User::with('user_id')->orderBy('user_id', 'ASC')->paginate(10);
return view('admin.users.index')->with("user", $users);
}
public function create()
{
return view('admin.users.create');
}
public function store(Request $request)
{
$users = new User($request->all());
$users->save();
return redirect()->route('admin.users.index');
}
public function show($id)
{
$users = User::find($id);
}
public function edit($id)
{
$users = User::find($id);
return view('admin.users.edit')->with('user', $user);
}
public function update(Request $request, $id)
{
$users = User::find($id);
$users->user_name = $request->user_name;
$users->user_birthday = $request->user_birthday;
$users->save();
return redirect()->route('admin.users.index');
}
public function destroy($id)
{
$users = User::find($id);
$users->delete();
return redirect()->route('admin.users.index');
}
}

Answer 1

Your error is from the following line of code. When you use with on a model is to load children relationships or sub-models. That is why the application is looking for the relationship user_id in the User Model thinking that it's a sub-model of the User model but it's not, so it return an error.
wrong
$users = User::with('user_id')->orderBy('user_id', 'ASC')->paginate(10);
correct
$users = User::orderBy('user_id', 'ASC')->paginate(10);