How, when receiving all instances of the model, immediately load whether they belong to the current user?

Question

Laravel

There is a User and Product model. Users can have many of the same products(many to many), but each product is not more than once.
It is necessary to show a list of all products available on the site in your account, but if the product has already been purchased by this user, this should be immediately indicated.
How to do it in the most efficient way?
In general, tell me an alternative to Product::all() so that marks are also loaded, whether the product was purchased by the current user.
I don’t really want to hack and do Product::all() and $user->products() , and then splice the results. Can you do without it?)

Answer 1

if I understand the task correctly, in the User model

public function getProductById($id)
{
  return $this->products()->find($id);
}
      
public function hasProduct($id)
{
    return $this->getProductById($id)->count()>0;
}

in controller

if ($user->hasProduct($product->id)) {
     // не продавать
}

pattern

@if ($user->hasProduct($product->id))
 <div class="danger">
      Вы уже купили этот товар
  </div>
@endif

you need to check what i wrote

Answer 2

There is no place to check, but it might work like this:

Product::with([
            'user' => function($query) {
                return $query->where('user_id', \Sentinel::getUser()->id);
            }
        ])->get();

If user is not empty, it means purchased by the current user

Answer 3

And why crutch something?
You get two collections, subtract one from the other in a loop or something else, and output depending on.
This is the simplest solution.

Answer 4

Good evening.
Why produce the same questions?
This is the third one in a row with the same problem.
Reinstall the entire system if you do not have enough knowledge how to restore everything.
Reinstallation will take much less time than writing your questions here.
Reinstall, and remember that ubuntu and others like it are not windows.
It is difficult to kill the system, but all the same, you have to think about what and where to enter and where to press.

Answer 5

Ну так поставьте Python. Нет дисковода, но всегда есть USB - можете переустановить с загрузочной флешки.
Если выберете путь переустановки, то имеет смысл перейти на Ubuntu 16.04.