Passing data from controller into Model in Laravel - laravel

Question

I have this comment controller:
class CommentsController extends Controller
{
public function store(Article $article){
$comment = new Comment();
$comment->user_id = auth()->id();
$comment->comment = request('comment');
$comment->article_id = $article->id;
$comment->save();
return back();
}
}
And it works. I tried to make my code cleaner by putting that logic into my model. So I changed it like this:
class CommentsController extends Controller
{
public function store(Article $article){
$article->addComment(request('comment'));
return back();
}
}
Meanwhile, in my Comment Model I'm doing like this:
class Article extends Model
{
protected $fillable = ['title','content','user_id'];
public function comments(){
return $this->hasMany(Comment::class);
}
public function user(){
return $this->belongsTo(User::class);
}
public function addComment($comment){
Comment::create([
'comment' => $comment,
'article_id' => $this->id,
'user_id' => auth()->id()
]);
}
}
but when I do this, I'm getting this kind of error:
"SQLSTATE[HY000]: General error: 1364 Field 'user_id' doesn't have a default value (SQL: insert into `comments` (`comment`, `article_id`, `updated_at`, `created_at`) values (Test comment bla bla bla..., 1, 2017-10-16 09:27:27, 2017-10-16 09:27:27)) ◀"
It seems I can't get the user_id in that manner, so how can I pass the user id so i can insert it into my comment tables? Thanks.

Answer 1

You need to add user_id to $fillable array in Comment model, not in Article model to make it work. Your original code works just because you do not use mass assignment there.

Answer 2

Try this:
public function addComment($comment){
Comment::create([
'comment' => $comment,
'article_id' => $this->id,
'user_id' => \Auth::user()->id
]);
}

Answer 3

try
\Auth::id()
instead of
auth()->id()
and go to your database and and make user_id default as NULL
The reason for this kind of error is that laravel protects database fields for mass assignment when you add the following code it makes all fields fillable.
protected $guarded = [];
Another way of doing is to add user_id in comments model. Is this case it will only allow the fields mentioned in the array to be mass assigned.
protected $fillable = [
'user_id'
];