You have to do: class Person < ActiveRecord::Base has_many :events has_many :meals, :through => :events, :source => :eventable, :source_type => “Meal” has_many :workouts, :through => :events, :source => :eventable, :source_type => “Workout” end This will enable you to do this: p = Person.find(1) # get a person’s meals p.meals.each do |m| puts m end # … Read more
Apparently :dependent is not ignored! The real issue was that I was calling Comment.delete(id) which goes straight to the db, whereas I now use Comment.destroy(id) which loads the Comment object and calls destroy() on it. This picks up the :dependent => :destroy and all is well.
Since condition arguments are deprecated in Rails 4, one should use scope blocks: has_many :users, -> { order ‘users.last_name, users.first_name’ }, :through => :assignments
Edit: Rails 3.1 supports nested associations. E.g: has_many :tasks has_many :assigments, :through => :tasks has_many :users, :through => :assignments There is no need for the solution given below. Refer to this screencast for more details. Original Answer You are passing a has_many :through association as a source for another has_many :through association. I don’t think … Read more
How about adding something like this into your User model? has_many :active_events, :through => :event_users, :class_name => “Event”, :source => :event, :conditions => [‘event_users.active = ?’,true] After that you should be able to get active events for a user just by calling: User.first.active_events
Alternatively, you can use a block and skip the association keyword. This makes it possible to build objects without saving to the database (otherwise, a has_many association will save your records to the db, even if you use the build function instead of create). FactoryGirl.define do factory :listing_with_features, :parent => :listing do |listing| features { … Read more
I think you can simply do this: @cust = Customer.new(params[:customer]) @cust.houses << House.find(params[:house_id]) Or when creating a new house for a customer: @cust = Customer.new(params[:customer]) @cust.houses.create(params[:house]) You can also add via ids: @cust.house_ids << House.find(params[:house_id])