Set has_many: through the game and use it in real form

class Allowedevent < ActiveRecord::Base
    :belongs_to :room
    :belongs_to :event
end

class Room < ActiveRecord::Base
    :has_many :allowedevents
    :has_many :events => :through => allowedevents
end

class Event< ActiveRecord::Base
    :has_many :allowedevents
    :has_many :rooms=> :through => allowedevents
end

I find it difficult to put the above relationships into a form or play with them in the console.

Questions:

• Now let's say that I save the room, do I need to explicitly add identifiers to the table allowedevents? I must do it?

  room = Room.new; room.title = "test"; room.allowedevents = "" ...?

  as you can see from above, I am losing information on how to save the actual record.

• Basically I want to ask how to save a room in a database that has a lot allowedeventsusing the above relationships. Do I need to go through user input and save each in allowedevents? is there a better way?

• railscasts, railscasts, , ?