activeadmin: adding delete for a nested resource

Question

I have a infrastructure object composed for many datacenters. In the apps/admin/infrastructures.rb I have the following code:

form do |f|
  f.inputs "Infrastructure details" do
    f.input :name

    f.has_many :datacenters do |datacenter_form|
      datacenter_form.input :name        
    end
  end
  f.buttons
end

I can add datacenters with no problems but I don't know how I can delete it from infrastructure form.

score 50 · Accepted Answer · edited Jun 20 '20 at 09:12

Sep 2017 Update:

Rails 5.1.4, ActiveAdmin 1.0.0

Append :id and _destroy in permit_params along with other attributes from the model e.g. :name in your case. Then provide the :allow_destroy option in f.has_many too. Other requirements remain the same; like adding allow_destroy: true in accepts_nested_attributes_for.

Final look:

ActiveAdmin.register Infrastructure do
  permit_params :name, datacenters_attributes: [:id, :_destroy, :name]

  form do |f|
    f.inputs "Infrastructure details" do
      f.input :name

      f.has_many :datacenters, heading: false,
                               allow_destroy: true,
                               new_record: false do |datacenter_form|
        datacenter_form.input :name        
      end
    end
    f.buttons
  end
end

ActiveAdmin Reference

This worked for me:

     i.input :_destroy, as: :boolean

and in the Model remember to add :allow_destroy :

     accepts_nested_attributes_for :images, allow_destroy: true

With Rails 4, it only worked for me once I permitted `:_destroy` through my strong parameters: `permit_params ..., nested_model_attributes: [:_destroy, ... ]` — februaryInk, Jun 17 '15 at 20:07
I'd forgotten the `allow_destroy: true` option on `accepts_nested_attributes_for` — Rob, Sep 11 '15 at 15:36
I thought permit_params was enough, thank you! none of the other answers mention this. — caesarsol, Oct 20 '15 at 17:55

score 14 · Answer 2 · edited Oct 06 '15 at 03:55

14

Solved adding the following line:

datacenter_form.input :_destroy, :as => :boolean, :required => false, :label => 'Remove'

The code looks like:

form do |f|
  f.inputs "Infrastructure details" do
    f.input :name

    f.has_many :datacenters do |datacenter_form|
      datacenter_form.input :name
      datacenter_form.input :_destroy, :as => :boolean, :required => false, :label => 'Remove'
    end
  end
  f.buttons
end

edited Oct 06 '15 at 03:55

arogachev

33,150
7
114
117

answered Jan 30 '12 at 18:40

Seoman

783
1
7
18

7

this works, but it just seems sloppy. Is there a way to add the Delete button that active admin has when you add a new nested resource to existing resources on an update? – pizza247 Jun 25 '12 at 14:35
Agreed. Why doesn't the delete button appear for persisted records? – Joe Sak Jun 24 '13 at 16:53
Agreed is there anyway to get a button? – DhatchXIX Jul 25 '13 at 16:31
Yes, has anyone found a solution to this? – Alfie Jul 31 '15 at 06:31

score 5 · Answer 3 · answered Jan 04 '14 at 21:02

5

If you cant destroy the object nested. You need to put :_destroy in your app/admin/object.rb permit_params

permit_params :id,:name, :cod, :_destroy

answered Jan 04 '14 at 21:02

user3161259

59
1
1

1

In case of nested attributes needed to be destroyed, the `:_destroy` param should be in the `nested_attributes` attributes. => ( permit_params :attr, :attr, _attributes: [:attr, :attr, :_destroy] – x6iae Jan 29 '16 at 17:58

Iwo Dziechciarow · Answer 4 · 2012-12-14T16:48:02.387

I hope this will be helpful (I've changed my code to suit your example, so I hope there are no typos here):

  form do |f|
    f.inputs "Infrastructure details" do
      f.input :name

      f.has_many :datacenters do |datacenter_form|
        datacenter_form.inputs :datacenters do
          datacenter_form.input :name
        end
        datacenter_form.buttons do
          link_to "Delete", admin_datacenter_path(datacenter_form.object), method: "delete", class: "button" unless datacenter_form.object.new_record?
        end
      end
    end
    f.buttons
  end

and the controller method should be defined in datacenters.rb

controller do
    def destroy
      @datacenter = Datacenter.find(params[:id])
      @datacenter.destroy
      redirect_to edit_admin_retailer_path(@datacenter.infrastructure)
    end
  end

score 0 · Answer 5 · answered Jan 07 '18 at 23:33

0

Don't forget to add the following to your parent model

has_many :child_name, :dependent => :destroy

answered Jan 07 '18 at 23:33

Alexey Krivitsky

1

Please be more specific with your answer. Provide an explanation of what this does and how the code snippet answers the question. – sparkitny Jan 07 '18 at 23:59

score 0 · Answer 6 · answered Jan 24 '12 at 01:00

0

This should work:

datacenter_form.label :_delete
datacenter_form.check_box :_delete

This adds a checkbox for each nested object which will delete the object if checked.

answered Jan 24 '12 at 01:00

smudge

801
1
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Thanks for the answer. I'm getting this error: "undefined method `_delete' for #" – Seoman Jan 24 '12 at 04:17

activeadmin: adding delete for a nested resource

6 Answers6

Sep 2017 Update:

Linked