Create_Association does not work

Question

it's been quite some time since i last wrote Rails and i've forgotten some stuff i guess :P I'm having a simple has_many through but i can't get create_association to work for some reason. The models are :

class City < ActiveRecord::Base
    has_many :city_buildings
    has_many :buildings, :through => :city_buildings

class CityBuilding < ActiveRecord::Base
    belongs_to :city
    belongs_to :building
end

I write something like :

c = City.first
c.create_building

and i get :

NoMethodError: undefined method `create_building' for #<City:0x007f9a8f9494f0>

Why do i get that ? Any idea ?

Answer 1

c = City.first
c.buildings.create :attribute => 'value'

Methods which the has_many declaration adds to your models.