Cannot call to a public function of Model (Laravel) - php

Question

I just started learning Laravel, I'm newbie. I've got a problem, I'm watching Laravel Course for beginners and learning, was doing exactly the same as in he tutorial, but still ended up with a problem. I hope to find a solution soon. I'll explain it a little bit.
The project is kind of a clone of Instagram. Users can post images to page.
I have this function in User model
User.php
public function posts()
{
return $this->hasMany(Post::class);
}
And I'm trying to access it from my PostsController
PostsController.php
class PostsController extends Controller
{
public function create()
{
return view('posts.create');
}
public function store()
{
$user = auth()->user();
$data = request()->validate([
'caption' => 'required',
'image' => ['required', 'image']
]);
auth()->user()->posts()->create($data);
\App\Models\Post::create($data);
dd(request()->all());
}
}
I'm doing exactly as in tutorial, but for some reason this line is failing at posts() call.
auth()->user()->posts()->create($data);
I'm getting that it's undefined method. But it is indeed defined in User.php
EDIT:
Exact error I'm getting is:
Illuminate\Database\QueryException
SQLSTATE[23000]: Integrity constraint violation: 19 NOT NULL constraint failed: posts.user_id (SQL: insert into "posts" ("caption", "image", "updated_at", "created_at") values (Caption, C:\xampp\tmp\php2E32.tmp, 2021-05-19 12:16:08, 2021-05-19 12:16:08))
And foreign key is user_id.
Actually I just checked my posts table and it seems it is stored in database, so it's working, but how to get rid of this error then?

Answer 1

this is a silly mistake of you..you are adding same post twice. once with relationship association and again from post model.
auth()->user()->posts()->create($data);
\App\Models\Post::create($data); //this is causing the issue here.
with relationship association auth()->user()->posts()->create($data), post is inserted to the database. as the foreign key user_id is coming from relationship. but in the next line \App\Models\Post::create($data), your $data array is missing user_id and thus the NOT NULL constraint failed error occurs. you can't insert a row with user_id being null. and this line is actually adding duplicate data. remove this line. use either one of the method.
with relationship association
$data = request()->validate([
'caption' => 'required',
'image' => ['required', 'image']
]);
auth()->user()->posts()->create($data);
or using model directly
$data = request()->validate([
'caption' => 'required',
'image' => ['required', 'image']
]);
$data['user_id'] = auth()->user()->id; //added user_id in the validated data array
\App\Models\Post::create($data);
and vs code always don't know all of your functions. depending on vs code to find a problem is not the best way.

Answer 2

Note:: you need to use Post Model and you can directly create data Using Post::create() method.
//Import Data
use Illuminate\Http\Request;
use App\Modes\Post;
class PostsController extends Controller
{
public function create()
{
return view('posts.create');
}
public function store(Request $request)
{
//Check Validation
$data = request()->validate([
'caption' => 'required',
'image' => ['required', 'image']
]);
//Get Login User Data in $user variable
$user = auth()->user();
//Store user id into $data variable which we can pass into $data Variable.
$data[‘user_id’] = $user->id;
//Create Data Using create() method.
$post = Post::create($data);
//Final Save Your Data
if( $post->save() ) {
dd(“data save successfully”);
}else{
dd(“something went wrong”);
}
}
}