Question

I have three models:

• User
• File
• Download

User has_many Files, File belongs_to User

File has_many Downloads, Download belongs_to User

Is there any way to retrieve all a User‘s Downloads, without iterating through all Files, then retrieving the Downloads associated with each file? (this would generate lots of queries)

EDIT

I’ve found a way of loading a User, it’s Files and Downloads in just 3 queries

user = User.includes(:uploads => [:downloads]).find(1)

However, what if I already have a User object?

And what if I just want to load the users downloads without loading their uploads? (using a join)

EDIT

Download.joins(:upload => :user).where(:users  => { :id => user.id })

Is there a way of doing this having the reference the users table primary key directly?

Answer 1

have you tried

class User
  has_many :downloads, :through => :files
end