active_admin and has_one association

Question

I have two models with following associations:

class Panel < ActiveRecord::Base
  belongs_to :survey
end


class Survey < ActiveRecord::Base
  has_one :panel
end

And I'm using active_admin to manage surveys:

ActiveAdmin.register Survey do
  config.per_page = 20

  actions :index, :edit, :update

  index do
    column 'Survey ID' do |s|
      s.id
    actions defaults: true
  end

  form do |f|
    inputs do
      input :id, input_html: { disabled: true }
    end
    f.actions
  end
end

And now I want to add a field to form to have possibility to change survey panel. I read through all documentation of active_admin but didn't find any similar case... Is this possible to do with ActiveAdmin?

I'm sorry its f inside the loop as well. `f.inputs do f.has_one :panel end` — Vamsi Krishna, Jul 07 '15 at 13:28
I guess you should be using has_many only inside. It says so in Wiki. Check Nested Resources comment in the following url. https://github.com/activeadmin/activeadmin/blob/master/docs/5-forms.md#nested-resources — Vamsi Krishna, Jul 07 '15 at 13:31
You can create forms with nested models using the has_many method, even if your model uses has_one. Thats what wiki says. — Vamsi Krishna, Jul 07 '15 at 13:32
I was trying something like that: f.inputs do f.has_many :qualtrics_panel, heading: 'Themes', allow_destroy: true, new_record: false do |a| a.input :id end end but this returns me: undefined method `new_record?' for nil:NilClass — Mateusz Urbański, Jul 07 '15 at 13:33
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/82608/discussion-between-vamsi-krishna-and-mateusz-urbanski). — Vamsi Krishna, Jul 07 '15 at 13:35
Actually you were accessing just new_record. But, why does the error say new_record? with a question mark... — Vamsi Krishna, Jul 07 '15 at 13:37
Are you trying to add a new record. Then the new_record should be some string not false. — Vamsi Krishna, Jul 07 '15 at 13:38
Thank you for help. I will rewrite my association to has_many and belongs_to. — Mateusz Urbański, Jul 07 '15 at 13:46
You can write nested form for :has_one specifically, check this answer out http://stackoverflow.com/questions/8159884/rails-activeadmin-nested-form-has-one-accepts-attributes-for-formtastic-issue — Kirill Fedyanin, Aug 02 '16 at 15:00

score 2 · Answer 1 · answered Jul 08 '15 at 07:01

2

You can create forms with nested models using the has_many method, even if your model uses has_one

https://github.com/activeadmin/activeadmin/blob/9c46b14ea0d9b3aaaa3d7520555c9959d06ce7f3/docs/5-forms.md#nested-resources

answered Jul 08 '15 at 07:01

Timo Schilling

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active_admin and has_one association

1 Answers1