has_many associations with custom foreign_key and primary_key break edit views.

[submitteddenied]

Given two models, User and Invitation:

class User < ActiveRecord::Base
  #attribute :email
  has_many :invitations, primary_key: :email, foreign_key: :invitee_email
end

class Invitation < ActiveRecord::Base
  #attribute :invitee_email
  belongs_to :invitee, class_name: "User", primary_key: :email, foreign_key: :invitee_email
end

Rails admin throws a NoMethodError error when loading the edit page NoMethodError in RailsAdmin::Main#edit

ActionView::Template::Error (undefined method `email' for #<Invitation:0x007fb0e2adfc88>):
    17:   collection = if xhr
    18:     selected.map { |o| [o.send(field.associated_object_label_method), o.send(field.associated_primary_key)] }
    19:   else
    20:     i = 0
    21:     controller.list_entries(config, :index, field.associated_collection_scope, false).map { |o| [o.send(field.associated_object_label_method), o.send(field.associated_p
rimary_key)] }.sort_by {|a| [selected_ids.index(a[1]) || selected_ids.size, i+=1] }
    22:   end
    23: 
  activemodel (4.0.2) lib/active_model/attribute_methods.rb:439:in `method_missing'
  activerecord (4.0.2) lib/active_record/attribute_methods.rb:155:in `method_missing'
  rails_admin (0.6.0) app/views/rails_admin/main/_form_filtering_multiselect.html.haml:20

I tracked this down to be on line 21 where field.associated_primary_key is sent to o, this needs to be field.foreign_key.

I'll submit a pull request soon (if I make this change it fixes my issue), but I'm not sure what else my change might break.

[Alexander-Senko]

I also have a quick fix for myself, but there is one interesting thing… The Rails have a very similar bug: rails/rails#14439. Maybe we shall wait for them to make a consistent fix then?

But we can wait for ages considering their bureaucracy… 8(

[daveyoon]

is this still an open issue? Just ran into it.

[asiniy]

+1. Same issue

[dannatobigodo]

+1. I temporarily configured the association invisible for the edit action.

class User < ActiveRecord::Base
  has_many :phone_numbers, foreign_key: :user_custom_key, primary_key: :custom_key

  rails_admin do
    edit do
      configure :phone_numbers do
        visible false
      end
    end
  end
end

class PhoneNumber < ActiveRecord::Base
  belongs_to :user, foreign_key: :user_custom_key, primary_key: :custom_key
end

Apparently the problem does not afflict the belongs_to side.