I have the following associations:
class User < ActiveRecord::Base
has_and_belongs_to_many :brands, :join_table => 'brands_users'
has_and_belongs_to_many :companies, :join_table => 'companies_users'
end
class Brand < ActiveRecord::Base
belongs_to :company
has_and_belongs_to_many :users, :join_table => 'brands_users'
end
class Company < ActiveRecord::Base
has_and_belongs_to_many :users, :join_table => 'companies_users'
has_many :brands, :order => :name
end
While editing a user I am using the checkbox list of brands. So that I can assign users 'access' to brands, the brands that show up are only the brands that belong to the current company (defined by the subdomain [using subdomain_fu]).
The problem I am running into is that when using the default HABTM functionality and the checkbox list, upon save, Rails removes ALL user-brand associations, then re-adds just the ones for the form I just submitted..
How do I scope that to only remove associations of brands who belong to the current company, defined in the subdomain?
