Error: Call to a member function stores() on null-CodePudding

I have 2 Tables Users and Stores the relation between them is a Pivot table called user_store

User::find($user_id)->stores()
                ->sync(Store::whereIn('id', $store_ids)->get());

i know it's not very clear but if you have idea what is the cause of the problem

CodePudding user response：

It is saying that you are calling stores on user which happens to be null:

Depending on PHP version:

User::find($user_id)?->stores() ... // null safety

OR

$user = User::find($user_id);
if($user != null){
  $user->stores()...
}