has_many :through behaviour trouble

rubyonrails-talk
1

Hi there!

I have the following classes, but I don't undersant why, when I try to create some

class Wishlist < ActiveRecord::Base   has_many :activated_user_wishlists, :class_name => "UserWishlist", :conditions => {:registered => true}   has_many :users_registered, :through => :activated_user_wishlists, :class_name => "User", :source => "wishlist" end

class UserWishlist < ActiveRecord::Base   belongs_to :wishlist   belongs_to :user end

class User < ActiveRecord::Base   has_many :user_wishlists   has_many :wishlists, :through => :user_wishlists end

And when I try to do that: Wishlist.first.users_registered << User.first And then look at the join table, that's what I see:

#<UserWishlist user_id: nil, wishlist_id: 1, admin: false, registered:

]

Someone know why user_id is nil?

2

Hi Guillem Vidal,

There was a small issue with association build on Wishlist Model.

class Wishlist < ActiveRecord::Base has_many :activated_user_wishlists, :class_name => "UserWishlist", :conditions => {:registered => true} has_many :users_registered, :through => :activated_user_wishlists, :source => :user end

You can use the above mentioned code(changes in users_registered association). Then it will works fine.

In has_many :through association, specifying the source(Model name) is enough.

Cheers, vadivelan