nested_form and Single table inheritance

Question

I'm having trouble using it with STI and wondered if you can give me some pointers. I want to add attachments to discussion as well. I tried several attempts to make it work but always got exceptions.

do i need to add accepts_nested_attributes_for in discussion.rb ? do i need to add a column in the attachments table ?

class Post < ActiveRecord::Base
  has_many :attachments, :dependent => :destroy
  accepts_nested_attributes_for :attachments, :reject_if => lambda { |a| a[:url].blank? }, :allow_destroy => true
end

class Discussion  < Post
end

class Attachment < ActiveRecord::Base
belongs_to :post
end

if some attachments are linked to some posts, you'll need to add the post_id in your attachment table — apneadiving, Apr 12 '11 at 13:25

score 0 · Answer 1 · answered Apr 12 '11 at 13:26

0

do i need to add accepts_nested_attributes_for in discussion.rb ?

If there is now any differences with parent class - No

do i need to add a column in the attachments table ?

Only post_id or any other key

answered Apr 12 '11 at 13:26

fl00r

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Do i need to add accepts_nested_attributes_for in discussion.rb ? and has_many :attachments, :dependent => :destroy ? – Gady Apr 12 '11 at 20:05
No. It willbe enough to be placed in parent class – fl00r Apr 12 '11 at 20:08

nested_form and Single table inheritance

1 Answers1