Eloquent using parent field in subquery - eloquent

Question

How can i access the 'id' field in the first query, and use it in the second subquery in this example:
$users = \App\User::where('active', 1)->where('deleted_at', null)->where('recieve_jobagent', 1)
->with(['companies' => function($query){
$query->where('active', 1);
$query->with(['posts' => function($posts){
$posts->where('active', 1);
$posts->whereHas('users', function($postUsers){
**I do not have access to 'users.id' here**
$postUsers->where('user_id', 'users.id');
});
}]);
}]);
I'm using lumen 5.1.
My goal here is to get all users and their related companies, and the companies' posts that isn't related to the user.

Answer 1

I dont think you need to do that. You can use whereHas and by drilling down into the relationships it returns only the ones that belong to the thing you're querying.
Without seeing your relationship structure, I would assume you need something like this?
$users = \App\User::where('active', 1)->where('deleted_at', null)->where('recieve_jobagent', 1)
->whereHas('companies', function($query){
$query->where('active', 1)
->whereHas('posts', function($query){
where('active', 1);
})
})
->with(['companies' => function($query){
$query->where('active', 1);
$query->with(['posts' => function($posts){
$posts->where('active', 1);
}]);
}]);