How get model by double relation without using like where(id:

This strange title is all that i think out.

I have to objects: @user (instance of User model) and @chat (instance of Chat model).

And i need to get record from table chats_users (relation has name chatusers) by these having objects, not by one of them and writing something like this: @user.chatusers.where(chat_id: or @chat.chatusers.where(user_id:

What i looking foor must looking like this:

@user.double_relation(@chat, target: chatusers)


There is no such thing - you will have to write such a method yourself (which would just do chatusers.where(chat_id: chat) internally, assuming this is a method on user)