Question

i setup a relationship using has_and_belongs_to_many to associate users and events. Then I try this:

user = User.find(1)
event = Event.find(1

)

both of these are not currently associated…then I try to associate them by doing:

user.events << event

this action works…however, they don’t associate correctly for each other:

user.events lists the event correctly for this user…but event.users does not have that user associated with it.

how do I make it so that when I associate one with the other (either the event with user or user with event)…it automatically associates the other way?

Answer 1

Is the has_and_belongs_to_many present in both models? It sounds like it is not, whereas it should be:

# models/user.rb
class User < ActiveRecord::Base
  has_and_belongs_to_many :events
end

# models/event.rb
class Event < ActiveRecord::Base
  has_and_belongs_to_many :users
end