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How do you edit the attributes of a join model when using accepts_nested_attributes_for? I have 3 models: Topics and Articles joined by Linkers class Topic < ActiveRecord::Base has_many :linkers has_many :articles, :through => :linkers, :foreign_key => :article_id accepts_nested_attributes_for :articles end class Article < ActiveRecord::Base has_many :linkers has_many :topics, :through => :linkers, :foreign_key => :topic_id end class Linker < ActiveRecord::Base #this is the join model, has extra attributes like "relevance" belongs_to :topic belongs_to :article end So when I build the article in the "new" action of the topics controller... @topic.articles.build ...and make the nested form in topics/new.html.erb... <% form_for(@topic) do |topic_form| %> ...fields... <% topic_form.fields_for :articles do |article_form| %> ...fields... ...Rails automatically creates the linker, which is great. Now for my question: My Linker model also has attributes that I want to be able to change via the "new topic" form. But the linker that Rails automatically creates has nil values for all its attributes except topic_id and article_id. How can I put fields for those other linker attributes into the "new topic" form so they don't come out nil?

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