polymorphic associations causes exception

[alec-c4]

Hi,
i have model called Flag
class Flag < ActiveRecord::Base
attr_accessible :report_type, :flaggeable_id, :flaggeable_type, :return_to
########## Associations
belongs_to :author, :class_name => "User"
belongs_to :flaggeable, :polymorphic => true
end

and when i attempting to access this model from rails_admin i see error

NoMethodError in RailsAdmin::MainsController#list

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.map

Full traces - http://pastie.org/1840863
But, when i have commented line belongs_to :flaggeable, :polymorphic => true everything works fine.

Could you check please work with polymorphs?

[kaapa]

Thank you for the report!

This might be a duplicate of issue #370 which has been resolved by c948fe7. Could you try to update RailsAdmin and check if this one's fixed as well?

[alec-c4]

Hi,
not fixed :( with

remote: git://github.com/sferik/rails_admin.git
revision: 5af47a1
specs:
rails_admin (0.0.1)
builder (> 2.1.0)
rails (> 3.0.6)

[kaapa]

Do you have flaggeable parent models defined? With this I mean the has_many/has_one end of the association.

[alec-c4]

Of course
class Issue < ActiveRecord::Base
has_many :flags, :as => "flaggeable", :dependent => :destroy
end

[kaapa]

Ok, does the problem go away if you declare parent as symbol

has_many :flags, :as => :flaggeable, :dependent => :destroy

[alec-c4]

yes, works fine. Could you please fix it with declaration as string?

[kaapa]

Closed by 0e2c1d4