One-to-One and One-to-Many Relations confusion

[ZimboPro]

I have a scenario where the main table has a one-to-one relation with another table and also a one-to-many relation to the same table.

User - User details (1 to 1)
User -> Favourite profiles <-> User details (Many to many via favourite profiles)

Whenever I try to find the directly related User details (1-to-1) the query instead returns all the favourites eg

// Code is from memory so there might be a few differences
let user = User::find_by_id(id).await?;
let user_details =  user.find_related(User_Details).await?;

I have looked at the docs but it only mentions how to create relations and not how to do an actual query using those relations. In the cases there are actual examples it is 1-to-many or many-to-many. It might be possible that I am using the wrong function or there is a different way around this. Admittedly,I could just call UserDetails.find_by_id(user.user_id).await but with all the examples for find_related it does give the impression that there is a function that does this that is generated by the macros or CLI.

Is there actually a function on the entity that would do this or is UserDetails.find_by_id(user.user_id).await the recommended way