Issue with nested form and new version of rails_admin

[michael_h]

Hi,

since I updated my version of rails_admin (I haven't updated in about 2 months) and started applying some control against mass-assignment, I am having trouble displaying nested fields in the Rails Admin interface.

I am using Rails 3.1.1 (ruby 1.9.3), and I have the following scenario:

Model 1: Trip

              has_many :transports, :dependent => :destroy        

              attr_accessible :trip_name, :transports_attributes

              accepts_nested_attributes_for :transports, :allow_destroy => true

 

Model 2: Transport

             belongs_to :trip

             attr_accessible :transport_mode, :departure_date, :arrival_date

When I browse the Admin interface, navigate to Trips and click on "Add new Trip", I get to fill in all details for the trip, but when I click on the "Add a new Transport" button, I can only see a new tab saying "Transport (new)". It actually does not show me any fields for that new Transport item.

I believe this has something to do with mass assignment. I have read the following, but I don't think I am missing anything in the above models.  - https://github.com/sferik/rails_admin/wiki/Mass-assignments-protection

Any advice?

Thanks in advance,

Michael

[michael_h]

I just found out that my example above works fine when using the following rails_admin gem declaration: 

gem 'rails_admin', :git => 'git://github.com/sferik/rails_admin.git', :ref => 'dac2e551c5126226ae8823118059a14f4d4b6cb7'

but it does not when using the following hash (or later versions):

gem 'rails_admin', :git => 'git://github.com/sferik/rails_admin.git', :ref => '60f26aab9536378d8c0bfde79a9a3ee472de02df'

The second hash is related to a "better nested form" update, but it seems to be the cause to the issue I am experiencing.

Any thoughts?

Thanks,

Michael

[michael_h]

Resolved the issue by first switching over to bbenezech-nested_form gem (from ryanb's version), since it is recommended for Rails Admin (see https://github.com/sferik/rails_admin/issues/1001#issuecomment-4839284).

I also fixed the following associations that i had in my Transport Model:

I had : 

# Transport Addresses

has_many :addresses, :class_name => "TransportAddress", :dependent => :delete_all

has_one :origin_address

has_one :destination_address

Changed it to:

# Transport Addresses

has_one :origin_address

has_one :destination_address

(each address inherits from TransportAddress model, which belongs to the Transport model)

Once I applied the above changes, I was able to see all of my nested form fields.

Michael