Relationship "many-to-many". How to display related data?

Question

Laravel

There are two tables in the database and an organized relationship between them belongsToMany ("many-to-many") through an intermediate table, for example, users (Users), groups (Communities) and a linking table group_user.
How can I display a list of checkboxes of all Communities on the site, with checkboxes checked, for a specific User, if he is a member of the community.
I did this, but this option does not work correctly

@foreach ($groups as $group)
  @foreach (@user->groups as $user_group)
    @if ($user_group->id == $group->id)
      <input type="checkbox" checked>$group->title
    @else
      <input type="checkbox">$group->title
    @endif
  @endforeach
@endforeach

The loop in the loop and then checking the condition is somehow not very pleasant.
Maybe there is some method that would make it easier to check if one model belongs to another? I still can't figure it out myself

Answer 1

@foreach ($groups as $group)
    @if ($user->groups->contains($group))
      <input type="checkbox" checked>{{ $group->title }}
    @else
      <input type="checkbox">{{ $group->title }}
    @endif
@endforeach

Answer 2

@foreach ($groups as $group)
    @if (in_array($group, @user->groups))
      <input type="checkbox" checked>$group->title
    @else
      <input type="checkbox">$group->title
    @endif
@endforeach

Answer 3

This must be done at the database level.

SELECT * FROM users u 
LEFT JOIN group_user gu ON (u.user_id = gu.user_id) 
LEFT JOIN group g ON (g.group_id = gu.group_id)
WHERE g.group_id = group_id