how to use the relation in with on where in laravel code example
Example 1: laravel where on relation
Event::whereHas('participants', function ($query) {
$query->where('IDUser', '=', 1);
})->get();
Example 2: associate laravel
When updating a belongsTo relationship, you may use the associate method. This
method will set the foreign key on the child model:
$account = App\Account::find(10);
$user->account()->associate($account);
$user->save();
When removing a belongsTo relationship, you may use the dissociate method. This
method will set the relationship foreign key to null:
$user->account()->dissociate();
$user->save();