Paginate data from relationship model in Laravel - php

Question

Apologies if the title doesn't completely make sense... I wasn't sure if the exact terminology for the linking of models are the associated data in their controllers.
I'm trying to paginate a table with the posts created by a user.
I managed to paginate it previously, without the user_id in the posts table. But I've added the user_id to the posts table, and run the migration which works fine.
The following is my Post model:
namespace App;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
public function user(){
return $this->belongsTo('App\User');
}
}
And this is my User model:
namespace App;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
class User extends Authenticatable
{
use Notifiable;
protected $fillable = ['name', 'email', 'password',];
protected $hidden = ['password', 'remember_token',];
public function posts() {
return $this->hasMany('App\Post');
}
}
And this is the relevant section of the post controller:
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Post;
use App\User;
use Session;
use Carbon\Carbon;
class PostController extends Controller
{
public function index()
{
$user_id = auth()->user()->id;
$user = User::find($user_id);
return view('posts.index')->with('posts', $user->posts);
}
I thought that it would simply be a case of appending ->paginate(5) to the $user in the PostController, but that doesn't appear to work.
I get the following:
Undefined property: Illuminate\Pagination\LengthAwarePaginator::$posts
I've tried including the {!! $posts->links() !!} in the posts.index view before the #foreach but that gives:
Undefined property: Illuminate\Pagination\LengthAwarePaginator::$posts
I'm trying to learn Laravel basics by creating this crud application, and have tried combining two tutorials together, but I'm clearly missing something.

Answer 1

You can call ->paginate() on the relationship like this (also I've removed the unnecessary user query, since auth()->user() will execute it already):
public function index()
{
$user = auth()->user();
$posts = $user->posts()->paginate();
// Or with 1 line: $posts = auth()->user()->posts()->paginate();
return view('posts.index')->with('posts', $posts);
}