Passing id's to many to many creation

Question

I have the following association in my Rails app:

Order has_and_belongs_to_many Type
Type has_and_belongs_to_many Order

There is a join table called OrdersTypes.

I know I can do Order.create(:types => [Type.first]).

However, if I am designing an API and I want the User to be able to create an order with just a Type id, how would the parameters look?

Something like Order.create(:type_ids => [1,2,3,4])

possible duplicate of [How to create an object for a Django model with a many to many field?](http://stackoverflow.com/questions/6996176/how-to-create-an-object-for-a-django-model-with-a-many-to-many-field) — Dave Satch, May 07 '14 at 02:18

score 0 · Answer 1 · answered May 07 '14 at 06:34

0

You would do

Order.create(:type_id => params['id'].map(&:to_i) )

where params['id'] are the ids taken as input from user

answered May 07 '14 at 06:34

Asim Mushtaq

I get this: ``ActiveRecord::UnknownAttributeError: unknown attribute: type_id`` – Hommer Smith May 07 '14 at 17:12
Do you have a type id in Order table as foreign key and is allowed as a strong parameter? – Asim Mushtaq May 08 '14 at 05:26

1 Answers1