undefined method `[]' for #<RailsAdmin::Adapters::ActiveRecord::Association:0x00000106a022e0>

[infernalmaster]

My gemfile:

source 'https://rubygems.org'
ruby '2.1.1'
gem 'rails', '4.0.0'
gem 'sqlite3'
gem 'sass-rails', '~> 4.0.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 1.2'
gem 'devise'
gem 'haml-rails'
gem 'simple_form'
gem 'therubyracer', :platform=>:ruby
group :development do
  gem 'better_errors'
  gem 'binding_of_caller', :platforms=>[:mri_19, :mri_20, :rbx]
  gem 'html2haml'
  gem 'quiet_assets'
  gem 'rails_layout'
end
group :development, :test do
  gem 'factory_girl_rails'
  gem 'rspec-rails'
  gem 'thin'
end
group :production do
  gem 'unicorn'
end
group :test do
  gem 'capybara'
  gem 'database_cleaner', '1.0.1'
  gem 'email_spec'
end

gem 'rmagick', '~> 2.13.1'
gem 'rails_admin', require: 'rails_admin', github: 'sferik/rails_admin'
gem 'ckeditor'
gem 'carrierwave'
gem 'compass-rails'
gem 'susy', '1.0.9'

gem 'globalize', '~> 4.0.1'
gem 'globalize-accessors'
gem 'rails_admin_globalize_field'

And I found it's because of

properties = parent.abstract_model.associations.detect { |p| name == p[:name] }

'parent.abstract_model.associations' is an array of 'RailsAdmin::Adapters::ActiveRecord::Association', so fast fix is change that to

properties = parent.abstract_model.associations.detect { |p| name == p.name }

[Florian95]

Same here !

[emoreth]

Same here ! [2]

[scarfacedeb]

I'm really sorry for the delay! Thank you for finding the source of this problem.

It seems to me that this commit caused the issue.

You can update to 0.3.1 version to resolve it.