I'm upgrading a Rails 4.1.8 app (also using rails-api ~> 0.3.1) to 4.2.0.rc2 and would like to retain the respond_with functionality. I've added responders to the Gemfile, but when I bin/rake spec, I get:
/Users/sloveless/.gem/ruby/2.1.0/gems/actionpack-4.2.0.rc2/lib/action_controller/metal/mime_responds.rb:10:in `respond_to': The controller-level `respond_to' feature has been extracted to the `responders` gem. Add it to your Gemfile to continue using this feature: (NoMethodError)
gem 'responders', '~> 2.0'
Consult the Rails upgrade guide for details.
from /Users/sloveless/Development/twilight/app/controllers/application_controller.rb:6:in `<class:ApplicationController>'
from /Users/sloveless/Development/twilight/app/controllers/application_controller.rb:1:in `<top (required)>'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `block in require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:360:in `require_or_load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:494:in `load_missing_constant'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:184:in `const_missing'
from /Users/sloveless/Development/twilight/app/controllers/zone_maps_controller.rb:1:in `<top (required)>'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `block in require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:274:in `require'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:360:in `require_or_load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:494:in `load_missing_constant'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:184:in `const_missing'
from /Users/sloveless/Development/twilight/spec/controllers/zone_maps_controller_spec.rb:3:in `<top (required)>'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `block in load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `block in load_spec_files'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `each'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/configuration.rb:1105:in `load_spec_files'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:96:in `setup'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:84:in `run'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:69:in `run'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/runner.rb:37:in `invoke'
from /Users/sloveless/.gem/ruby/2.1.0/gems/rspec-core-3.1.7/exe/rspec:4:in `<top (required)>'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `block in load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/sloveless/.gem/ruby/2.1.0/gems/activesupport-4.2.0.rc2/lib/active_support/dependencies.rb:268:in `load'
from /Users/sloveless/.gem/ruby/2.1.0/gems/spring-commands-rspec-1.0.3/lib/spring/commands/rspec.rb:18:in `call'
from /Users/sloveless/.rubies/ruby-2.1.0/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/sloveless/.rubies/ruby-2.1.0/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'
Any ideas why I might be getting this? ...and, of course, how I can get around it?
Pertinent files:
# app/application_controller.rb
class ApplicationController < ActionController::API
include ActionController::MimeResponds
include ActionController::ImplicitRender
include SentientController
respond_to :json
# (Custom responder)
self.responder = HTTPErrors::Responder
before_action :set_locale
private
def set_locale
I18n.locale = http_accept_language.compatible_language_from(I18n.available_locales)
end
end
# Gemfile
source 'https://rubygems.org'
gem 'rails', '4.2.0.rc2'
gem 'rails-api', '~> 0.3.1'
# Other utils
gem 'uuidtools'
# Serializing things
gem 'active_model_serializers', '~> 0.8.2'
# Persisting things
gem 'pg', '~> 0.17.1'
# gem 'activerecord-postgis-adapter', '~> 2.2.1'
# gem 'redis'
# Controller & routing things
gem 'http_accept_language', '~> 2.0.2'
gem 'kaminari'
gem 'rack-cors', require: 'rack/cors'
gem 'responders', '~> 2.0'
group :development do
gem 'brakeman', require: false
gem 'guard-bundler'
gem 'guard-rails'
gem 'guard-rspec'
gem 'guard-rubocop'
gem 'rails_best_practices'
gem 'rubocop', require: false
gem 'quiet_assets'
gem 'web-console', '~> 2.0'
end
group :development, :test do
gem 'bullet'
gem 'byebug'
gem 'factory_girl_rails'
gem 'faker'
gem 'pry-rails'
gem 'pry-rescue'
gem 'pry-stack_explorer'
gem 'rspec-rails'
gem 'puma'
gem 'spring'
gem 'spring-commands-rspec'
end
group :test do
gem 'json_spec'
gem 'shoulda-matchers'
end
group :production do
gem 'newrelic_rpm'
end
Edit: To no surprise, this happens when I manually make a request, not just during testing.
The following worked for me using rails-api / active_model_serializers 0.8.3:
Remove
include ActionController::MimeResponds
include ActionController::ImplicitRender
Add
include ActionController::RespondWith
See this discussion on github.
For clarity, it looks like the issue can be reproduced if the controller inherits from ActionController::API and ActionController::MimeResponds is included. To avoid the error with controller-level respond_to, I have done this:
class ApplicationController < ActionController::API
include ActionController::MimeResponds
def self.respond_to(*mimes)
include ActionController::RespondWith::ClassMethods
end
respond_to :json
end
I didn't look at how to solve the issue for respond_with, but it would be a little different as it is an instance method.
Looks like it was a responders/rails-api incompatibility. I tried responders :location in the ApplicationController and would get a backtrace with undefined method 'responders' for ApplicationController:Class (NoMethodError), leading me to believe that the responders gem adds the responders class method to ActionController::Base. Since rails-api has your controllers inherit from ActionController::API, the responders methods wouldn't, in effect, get added to my ApplicationController.
Confirmed: responders/lib/responders/controller_method.rb
I tried extending my ApplicationController with Responders::ControllerMethod, but that didn't get me around the problem.
My solution, effectively, was to drop using rails-api, then ApplicationController < ActionController::Base.
If your controller inherits from ActionController::Metal you may also need to include ActionController::RespondWith given you added the responders gem.
I just added gem responder to my gemfile did a bundle install and then I did a rails generate responder:install and that installed the files. After that I ran my rails generate scaffold food name:string calories:float and after db:drop db:create and db:migrate (dropped and refreshed the database) I stopped getting errors.
Basically when I installed the gems and the files before running rails generate scaffold whatever it started to work.
来源：https://stackoverflow.com/questions/27412638/why-does-rails-4-2-responders-keeps-telling-me-to-add-responders-to-the-gemfil