I'm new to RoR so don't be surprised with possible dumm things I may say... sorry in advance...
I'm trying to create foreign keys constrainsts between two models "Addendum" and "Contract"
the ActiveRecord is now like this
class Addendum < ActiveRecord::Base
belongs_to :contract
end
class Contract < ActiveRecord::Base
has_many :addendums
end
So, I need that the program only lets creating a new Addendum if it will be associated to an existing contract. I've installed the gem foreigner and created this migration:
class AddingForeignKeys < ActiveRecord::Migration
def change
add_foreign_key(:contracts, :addendums)
end
end
run rake db:migrate
and expected to see changes on the ActiveRecord::Base (indicating the foreign key constraint) but no alteration occur
What am I doing wrong?
it is enough to have a contract_id column in the Addendum table, create the association ( in your case has_many and belongs_to) and into the Addendum model a validation constraint:
validates :contract, presence: true
hope helps
Federico