Rails4: Undefined method 'api_version'

[howcast]

I'm trying to use the Rails4 branch with Rails4.0.0-beta1 but keep getting that error.

Here is the stack trace:

project/config/routes.rb:4:in `block in <top (required)>': undefined method `api_version' for #<ActionDispatch::Routing::Mapper:0x007ff194f98390> (NoMethodError)
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/actionpack-4.0.0.beta1/lib/action_dispatch/routing/route_set.rb:320:in `instance_exec'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/actionpack-4.0.0.beta1/lib/action_dispatch/routing/route_set.rb:320:in `eval_block'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/actionpack-4.0.0.beta1/lib/action_dispatch/routing/route_set.rb:298:in `draw'
    from project/config/routes.rb:3:in `<top (required)>'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/dependencies.rb:222:in `load'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/dependencies.rb:222:in `block in load'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/dependencies.rb:213:in `load_dependency'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/dependencies.rb:222:in `load'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:40:in `each'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:40:in `load_paths'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:16:in `reload!'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:26:in `block in updater'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/file_update_checker.rb:75:in `call'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/activesupport-4.0.0.beta1/lib/active_support/file_update_checker.rb:75:in `execute'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:27:in `updater'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:9:in `rescue in execute_if_updated'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/initializable.rb:30:in `instance_exec'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/initializable.rb:30:in `run'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/initializable.rb:55:in `block in run_initializers'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
    from ~/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/initializable.rb:54:in `run_initializers'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/application.rb:213:in `initialize!'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/railties-4.0.0.beta1/lib/rails/railtie/configurable.rb:30:in `method_missing'
    from project/config/environment.rb:5:in `<top (required)>'
    from project/spec/spec_helper.rb:3:in `require'
    from project/spec/spec_helper.rb:3:in `<top (required)>'
    from project/spec/controllers/v2/categories_controller_spec.rb:1:in `require'
    from project/spec/controllers/v2/categories_controller_spec.rb:1:in `<top (required)>'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `block in load_spec_files'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `each'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load_spec_files'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/command_line.rb:22:in `run'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:80:in `run'
    from ~/.rvm/gems/ruby-2.0.0-p0@platform/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:17:in `block in autorun'

[bploetz]

What do your Gemfile/Gemfile.lock files look like?

[howcast]

Thanks for the quick response Brian!

Gemfile:

source 'https://rubygems.org'

gem 'rails', '4.0.0.beta1'

## Database
gem 'mongoid', '~> 4.0.0', git: 'https://github.com/mongoid/mongoid.git'

## Authentication
gem 'omniauth'
gem 'omniauth-oauth2'

## Utilities
gem 'kaminari'
gem 'rest-client'
gem 'multimap'
gem 'figaro'

## Mongoid Specific
gem 'mongoid_slug'
gem 'workflow_on_mongoid'

## File Uploading & Processing
gem 'fog'
gem 'blitline'

## Client Side
gem 'jquery-rails'
gem 'turbolinks'

## API
gem 'rabl'
gem 'oj'
gem 'versionist', git: 'https://github.com/bploetz/versionist.git', branch: 'rails4'

## Howcast Internal Gems & Engines
gem 'howcast_core', path: "/Users/feliks/Projects/Playground/howcast_core"

## Groups
group :assets do
  gem 'sass-rails',   '~> 4.0.0.beta1'
  gem 'coffee-rails', '~> 4.0.0.beta1'
  gem 'haml-rails'
  gem 'therubyracer', platforms: :ruby, require: 'v8'
  gem 'execjs'
  gem 'uglifier', '>= 1.0.3'
end

group :development, :test do
  gem 'rspec-rails'
  gem 'mongoid-rspec'
  gem 'capybara'
  gem 'fabrication'
  gem 'ffaker'
  gem 'launchy'
  gem 'database_cleaner'
  gem 'pry'
  gem "better_errors"
  gem "binding_of_caller"
end

Gemfile.lock:

GIT
  remote: https://github.com/bploetz/versionist.git
  revision: 9da9b47be825c86a24d8d784bf51b5a7de8250eb
  branch: rails4
  specs:
    versionist (2.0.0.beta1)
      rails (>= 3)
      yard (~> 0.7)

GIT
  remote: https://github.com/mongoid/mongoid.git
  revision: de244e9c323d777cdf6c260e9461200ad932185b
  specs:
    mongoid (4.0.0)
      activemodel (~> 4.0.0.beta)
      moped (~> 1.4.2)
      origin (~> 1.0)
      tzinfo (~> 0.3.22)

PATH
  remote: /Users/feliks/Projects/Playground/howcast_core
  specs:
    howcast_core (0.0.1)
      rails (~> 4.0.0.beta1)

GEM
  remote: https://rubygems.org/
  specs:
    actionmailer (4.0.0.beta1)
      actionpack (= 4.0.0.beta1)
      mail (~> 2.5.3)
    actionpack (4.0.0.beta1)
      activesupport (= 4.0.0.beta1)
      builder (~> 3.1.0)
      erubis (~> 2.7.0)
      rack (~> 1.5.2)
      rack-test (~> 0.6.2)
    activemodel (4.0.0.beta1)
      activesupport (= 4.0.0.beta1)
      builder (~> 3.1.0)
    activerecord (4.0.0.beta1)
      activemodel (= 4.0.0.beta1)
      activerecord-deprecated_finders (~> 0.0.3)
      activesupport (= 4.0.0.beta1)
      arel (~> 4.0.0.beta1)
    activerecord-deprecated_finders (0.0.3)
    activesupport (4.0.0.beta1)
      i18n (~> 0.6.2)
      minitest (~> 4.2)
      multi_json (~> 1.3)
      thread_safe (~> 0.1)
      tzinfo (~> 0.3.33)
    addressable (2.3.3)
    arel (4.0.0.beta2)
    atomic (1.1.6)
    better_errors (0.8.0)
      coderay (>= 1.0.0)
      erubis (>= 2.6.6)
    binding_of_caller (0.7.1)
      debug_inspector (>= 0.0.1)
    blitline (2.1.0)
      multi_json
    builder (3.1.4)
    capybara (2.0.3)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      selenium-webdriver (~> 2.0)
      xpath (~> 1.0.0)
    childprocess (0.3.9)
      ffi (~> 1.0, >= 1.0.11)
    coderay (1.0.9)
    coffee-rails (4.0.0.beta1)
      coffee-script (>= 2.2.0)
      railties (>= 4.0.0.beta, < 5.0)
    coffee-script (2.2.0)
      coffee-script-source
      execjs
    coffee-script-source (1.6.2)
    database_cleaner (0.9.1)
    debug_inspector (0.0.2)
    diff-lcs (1.2.2)
    erubis (2.7.0)
    excon (0.20.1)
    execjs (1.4.0)
      multi_json (~> 1.0)
    fabrication (2.6.4)
    faraday (0.8.7)
      multipart-post (~> 1.1)
    ffaker (1.15.0)
    ffi (1.6.0)
    figaro (0.6.3)
      bundler (~> 1.0)
      rails (>= 3, < 5)
    fog (1.10.1)
      builder
      excon (~> 0.20)
      formatador (~> 0.2.0)
      mime-types
      multi_json (~> 1.0)
      net-scp (~> 1.1)
      net-ssh (>= 2.1.3)
      nokogiri (~> 1.5.0)
      ruby-hmac
    formatador (0.2.4)
    haml (4.0.2)
      tilt
    haml-rails (0.4)
      actionpack (>= 3.1, < 4.1)
      activesupport (>= 3.1, < 4.1)
      haml (>= 3.1, < 4.1)
      railties (>= 3.1, < 4.1)
    hashie (2.0.3)
    hike (1.2.1)
    httpauth (0.2.0)
    i18n (0.6.4)
    jquery-rails (2.2.1)
      railties (>= 3.0, < 5.0)
      thor (>= 0.14, < 2.0)
    json (1.7.7)
    jwt (0.1.8)
      multi_json (>= 1.5)
    kaminari (0.14.1)
      actionpack (>= 3.0.0)
      activesupport (>= 3.0.0)
    launchy (2.2.0)
      addressable (~> 2.3)
    libv8 (3.11.8.17)
    mail (2.5.3)
      i18n (>= 0.4.0)
      mime-types (~> 1.16)
      treetop (~> 1.4.8)
    method_source (0.8.1)
    mime-types (1.22)
    minitest (4.7.0)
    mongoid-rspec (1.7.0)
      mongoid (>= 3.0.1)
      rake
      rspec (>= 2.9)
    mongoid_slug (3.0.0)
      mongoid (> 3.0)
      stringex (~> 1.4)
    moped (1.4.5)
    multi_json (1.7.2)
    multimap (1.1.2)
    multipart-post (1.2.0)
    net-scp (1.1.0)
      net-ssh (>= 2.6.5)
    net-ssh (2.6.6)
    nokogiri (1.5.9)
    oauth2 (0.8.1)
      faraday (~> 0.8)
      httpauth (~> 0.1)
      jwt (~> 0.1.4)
      multi_json (~> 1.0)
      rack (~> 1.2)
    oj (2.0.10)
    omniauth (1.1.4)
      hashie (>= 1.2, < 3)
      rack
    omniauth-oauth2 (1.1.1)
      oauth2 (~> 0.8.0)
      omniauth (~> 1.0)
    origin (1.0.11)
    polyglot (0.3.3)
    pry (0.9.12)
      coderay (~> 1.0.5)
      method_source (~> 0.8)
      slop (~> 3.4)
    rabl (0.8.2)
      activesupport (>= 2.3.14)
    rack (1.5.2)
    rack-test (0.6.2)
      rack (>= 1.0)
    rails (4.0.0.beta1)
      actionmailer (= 4.0.0.beta1)
      actionpack (= 4.0.0.beta1)
      activerecord (= 4.0.0.beta1)
      activesupport (= 4.0.0.beta1)
      bundler (>= 1.3.0, < 2.0)
      railties (= 4.0.0.beta1)
      sprockets-rails (~> 2.0.0.rc3)
    railties (4.0.0.beta1)
      actionpack (= 4.0.0.beta1)
      activesupport (= 4.0.0.beta1)
      rake (>= 0.8.7)
      rdoc (~> 3.4)
      thor (>= 0.17.0, < 2.0)
    rake (10.0.4)
    rdoc (3.12.2)
      json (~> 1.4)
    ref (1.0.4)
    rest-client (1.6.7)
      mime-types (>= 1.16)
    rspec (2.13.0)
      rspec-core (~> 2.13.0)
      rspec-expectations (~> 2.13.0)
      rspec-mocks (~> 2.13.0)
    rspec-core (2.13.1)
    rspec-expectations (2.13.0)
      diff-lcs (>= 1.1.3, < 2.0)
    rspec-mocks (2.13.1)
    rspec-rails (2.13.0)
      actionpack (>= 3.0)
      activesupport (>= 3.0)
      railties (>= 3.0)
      rspec-core (~> 2.13.0)
      rspec-expectations (~> 2.13.0)
      rspec-mocks (~> 2.13.0)
    ruby-hmac (0.4.0)
    rubyzip (0.9.9)
    sass (3.2.7)
    sass-rails (4.0.0.beta1)
      railties (>= 4.0.0.beta, < 5.0)
      sass (>= 3.1.10)
      sprockets-rails (~> 2.0.0.rc0)
      tilt (~> 1.3)
    selenium-webdriver (2.31.0)
      childprocess (>= 0.2.5)
      multi_json (~> 1.0)
      rubyzip
      websocket (~> 1.0.4)
    slop (3.4.4)
    sprockets (2.9.0)
      hike (~> 1.2)
      multi_json (~> 1.0)
      rack (~> 1.0)
      tilt (~> 1.1, != 1.3.0)
    sprockets-rails (2.0.0.rc3)
      actionpack (>= 3.0)
      activesupport (>= 3.0)
      sprockets (~> 2.8)
    stringex (1.5.1)
    therubyracer (0.11.4)
      libv8 (~> 3.11.8.12)
      ref
    thor (0.18.1)
    thread_safe (0.1.0)
      atomic
    tilt (1.3.6)
    treetop (1.4.12)
      polyglot
      polyglot (>= 0.3.1)
    turbolinks (1.1.1)
      coffee-rails
    tzinfo (0.3.37)
    uglifier (2.0.1)
      execjs (>= 0.3.0)
      multi_json (~> 1.0, >= 1.0.2)
    websocket (1.0.7)
    workflow (0.8.7)
    workflow_on_mongoid (0.8.0.7)
      mongoid
      workflow (~> 0.8)
    xpath (1.0.0)
      nokogiri (~> 1.3)
    yard (0.8.5.2)

PLATFORMS
  ruby

DEPENDENCIES
  better_errors
  binding_of_caller
  blitline
  capybara
  coffee-rails (~> 4.0.0.beta1)
  database_cleaner
  execjs
  fabrication
  ffaker
  figaro
  fog
  haml-rails
  howcast_core!
  jquery-rails
  kaminari
  launchy
  mongoid (~> 4.0.0)!
  mongoid-rspec
  mongoid_slug
  multimap
  oj
  omniauth
  omniauth-oauth2
  pry
  rabl
  rails (= 4.0.0.beta1)
  rest-client
  rspec-rails
  sass-rails (~> 4.0.0.beta1)
  therubyracer
  turbolinks
  uglifier (>= 1.0.3)
  versionist!
  workflow_on_mongoid

[bploetz]

Hmmm, looks ok. Let me try to reproduce locally. Stay tuned.....

[howcast]

awesome, thanks so much Brian!

[bploetz]

I created a fresh Rails4 app (using Ruby 2.0.0 like you are) and I'm able to reproduce this issue:

bundle exec rake routes
rake aborted!
undefined method `api_version' for #<ActionDispatch::Routing::Mapper:0x007fd4cbb22800>
/Users/bploetz/workspace/test-api-rails4/config/routes.rb:12:in `block (2 levels) in <top (required)>'

What's really concerning is that all of the versionist specs pass on Rails 4. :-/

Let me hunt this one down and push a fix up to that branch. Stay tuned.....

[bploetz]

Duh:

https://github.com/bploetz/versionist/commit/45f173348d814c8ee805511d3028797798c4fb07#L1L21

Run bundle update versionist and try again?

[howcast]

So that error went away but now i'm getting this error:

lib/action_dispatch/routing/mapper.rb:241:in `default_controller_and_action': 'V2/categories' is not a supported controller name. This can lead to potential routing problems. See http://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use (ArgumentError)

I generated a controller and route with the versionist generator so that we can eliminate typos as a cause.

This is my controller:

class V2::CategoriesController < V2::BaseController
  def index
    @categories = Category.all
    respond_with @categories
  end
end

This is my routes file:

Platform::Application.routes.draw do
  api_version(:module => "V2", :header => {:name => "Accept", :value => "application/vnd.howcast.com; version=2"}, :path => {:value => "v2"}, :defaults => {:format => "json"}, :default => true) do
    resources :categories
  end
end

Thanks so much for your help with this.

[bploetz]

Looks like a Rails 4 issue:

https://github.com/rails/rails/issues/9231 https://github.com/rails/rails/pull/9234

Not sure if the released Rails 4 RC contains this fix or not. Can you try pointing your app to Rails edge and see if you still see the problem?

[howcast]

Yep, you're right. Doesn't look like this is still fixed even in master for Rails4 with Ruby 2.0. Thanks for all your help!

[bploetz]

They don't call it bleeding edge for nothing. ;-) Good luck......

[howcast]

Haha, yes that is true. I found the issue however.

The versionist generator generates the route as follows:

api_version(:module => "V2" ...)

But when I changed the module name to a lowercase letter, it worked perfectly:

api_version(:module => "v2" ...)

[bploetz]

OK, so clearly they changed this behavior in Rails 4 and Versionist should adapt. I'll file a separate issue for this....

[howcast]

Great! Thanks so much again Brian, I really appreciate you responding and working through this issue with me so quickly.