如何通过表单中的模型在has_many之间添加关联？

Question

I have Groups and PhoneNumbers models connected with a has_many through relationship called group_phone_numbers.

Basically, on a group edit view, I want a list of phone_numbers with add or remove links next to them. When someone clicks add, it creates an association between the models and when someone clicks remove, it removes it. Is the proper way to do this by using a form? Or should I just do a link_to a custom controller action?

Answer 1

http://railscasts.com/episodes/196-nested-model-form-part-1?view=asciicast is what you need. fields_for specifically...