Adam, Thanks for the answer, let me add a little color as to what I'm trying to get working:
I have the following models: Users (id, name, email, instance_id, etc...) Instances (id, domain name) Books (id, name, user_id, instance_id) In Rails 3, When a new book is created, I need the user_id, and instance_id to be populated based on the current_user. Currently, user_id is being assigned when I create a new book but not instance_id? class Instance < ActiveRecord::Base has_many :users has_many :books, :through => :users, :order => "created_at DESC" end class User < ActiveRecord::Base belongs_to :instance has_many :books, :order => "created_at DESC" end class Book < ActiveRecord::Base belongs_to :user has_one :instance, :through => :user end Thoughts on this? I'm a newbie so I'd love to hear if I going down the right track or not... And I like your first suggestion assuming you like the models above: > params[:book][:instance_id] = current_user.instance_id > @book = current_user.books.create(params[:book]) On Sep 7, 9:37 pm, Adam <[email protected]> wrote: > On Tue, Sep 7, 2010 at 11:02 PM, nobosh <[email protected]> wrote: > > Hello, Rails newbie.... > > > How can I go From: > > > @book = current_user.books.build(params[:book]) > > > TO: > > > @book = current_user.books.create(params[:book], :instance => > > current_user.instance_id) > > > right now I get the following error "wrong number of arguments (2 for > > 1)" > > > Thanks > > I'm assuming that 'instance_id' is an attribute of a Book. In that case, it > needs to be part of the Hash you pass to #build or #create. You can do > either:> params[:book][:instance_id] = current_user.instance_id > > @book = current_user.books.create(params[:book]) > or > > @book = current_user.books.create(params[:book].merge(:instance_id => > > current_user.instance_id)) > Both assume that params[:book] is non-nil and is a Hash. I'd prefer the > first - it's more readable. > > Adam -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
