search for: subtype_id

...rm is also submitting info for the join table too. So in my model I have: class Type < ActiveRecord::Base has_and_belongs_to_many :subtypes, :class_name => ''Type'', :join_table => ''subtypes_types'', :association_foreign_key => ''subtype_id'', :foreign_key => ''type_id'' Then in the form I have this (@subtype carries the detail of the a parent -- so this form is called by a link "create a new subtype from this type". NB each type can have many subtypes and belong to many types to -- hence n...