Load relations only when a field in parent table is true - eloquent

Question

I have a parent table named Post which has a boolean column named is_anonymous. The Post table has a relation to Users table. I want to load this relation only when is_anonymous set to false. Is there a way I can achieve this?
The below relation gives users for all the posts.
$institute = Institute::where('inst_id', '=', $institute_id)->with(
['posts' => function ($posts) {
$posts->with(['user', 'tags']);
}]
)->orderBy('created_at', 'DESC')->skip($skip)->take(10)->get();

Answer 1

I ended up solving this using lazy loading. I think there is no other way I can do this. Please add answers if you find a better way.
$posts = Institute::where('inst_id', '=', $institute_id)->first()->posts()->with('tags')
->orderBy('created_at', 'DESC')->skip($skip)->take(10)->get();
foreach ($posts as $post) {
if (!$post['is_anonymous']) {
$post->load('user');
}
}
Or,
To be performance friendly, I'm currently solving this using the below query and removing the key user, as iterating over a list of 10 items and removing is always better than making 10 queries (worst case)
$posts = Institute::where('inst_id', '=', $institute_id)->first()->posts()->with(['user', 'tags'])
->orderBy('created_at', 'DESC')->skip($skip)->take(10)->get();
foreach ($posts as $post) {
if ($post['is_anonymous']) {
unset($post['user'])
}
}