nested has_one in active admin

问题

I'm using Rails 3.0.10 and ActiveAdmin 0.3.2.

I have a problem with nested form and an has_one association. Using an has_many I can get nested forms but I really need to understand and use an has_one in this case.

Model:

class Article < ActiveRecord::Base
  belongs_to :section
  has_one :seo
  accepts_nested_attributes_for :seo
end

class Seo < ActiveRecord::Base
  belongs_to :article
end

How write app/admin/article.rb ?

Thanks for any suggestions!

回答1:

I'm having exactly the same problem, and here's what I've got working so far:

f.inputs "Metadata" do
  f.inputs :for => [:seo_text, f.object.seo_text || SeoText.new] do |meta_form|
    meta_form.input :keywords
    meta_form.input :description
  end
end

Unfortunately the styling isn't very nice with out-of-the-box ActiveAdmin 0.6.0, so I'm still looking for a better solution. The has_many helper in ActiveAdmin's form build is close - I basically want a has_one version.

来源：https://stackoverflow.com/questions/7833554/nested-has-one-in-active-admin