The easiest solution I could find to this problem is to remove accepts_nested_attributes_for from the Product model and in the controller do:
@product = Product.new(params[:product]) @ingredient = find_or_initialise_by_name(params[:ingredient] if @product.save && @ingredient.save redirect_to @product, :flash => 'Success' else redirect_to :new end What do you think guys, do you have a better solution ? Wael Nasreddine wrote in post #1000565: > Hello, > > I'm a web developer comping from Zend Framework and I'm trying to learn > Rails the right way and avoid Bad Practice from the start. > > I have a few questions in my head that I'm unable to get answered on my > own, so I'm going to try and get it explained with an example. > > Let's say I'm building a site for a restaurant and the website have a > Menu model (which is essentially categories, like Pizza, Burgers etc..), > a Product model that belongs to the menu and an Ingredient model which > belongs to Product, code: > > class Menu < ActiveRecord::Base > has_many :products > > # … validations and other logic > end > > class Product < ActiveRecord::Base > belongs_to :menu > has_many :ingredients > > accepts_nested_attributes_for :ingredients > > # … validations and other logic > end > > class Ingredient < ActiveRecord::Base > belongs_to :product > > validates :name, :presence => true, :unique => true > > # … other validations and other logic. > end > > So far so good, however now I'm stuck because I'm not sure how to code > what I have in mind without ending up with a spaghetti code. In the new > product form, I would like the user to be able to add ingredients ( > accepts_nested_attributes_for already there so I should be good for > having the fields in the form ) but when the form has been filled and > submitted, I want to create an ingredient if and only if it does not > already exists, if on the other hand, it does, in this case the > association should happen on the one that already exists, for example: > > Let's say that I already have :onion in the ingredients table, if I > added a new product that has onion, I should not have two rows for the > :onion ingredient (should not happen since I added a validation), but > instead the association should happen on the one that already exists.. > > How can I accomplish that? Should I be using a before_create hook? What > should I do in that hook? or should I create a custom create method? > > Thank you. > > Wael -- Posted via http://www.ruby-forum.com/. -- 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.
