Push rejected, failed to compile ruby app -

currently @ chapter 3 of michael hartl's tutorial , keep running problem:

c:/users/huihui/sutdweb/spec/spec_helper.rb:82:in `block in <top (required)>': u ninitialized constant capybara (nameerror) 

this gemfile.rb:

source 'https://rubygems.org' ruby '1.9.3'  gem 'rails', '4.1.1'  gem 'sqlite3-ruby', '1.3.1', :require => 'sqlite3'   group :development, :test   gem 'sqlite3'   gem 'rspec-rails' end  group :test   gem 'selenium-webdriver', '2.35.1'   gem 'capybara', '2.3.0' end  gem 'sass-rails', '4.0.1' gem 'uglifier', '2.1.1' gem 'coffee-rails', '4.0.1' gem 'jquery-rails', '3.0.4' gem 'turbolinks', '1.1.1' gem 'jbuilder', '1.0.2'  group :doc   gem 'sdoc', '0.3.20', require: false end  group :production   gem 'pg', '0.15.1'   gem 'rails_12factor', '0.0.2' end 

and spec_helper.rb:

    # file generated `rails generate rspec:install` command. conventionally, # specs live under `spec` directory, rspec adds `$load_path`. # generated `.rspec` file contains `--require spec_helper` cause # file loaded, without need explicitly require in files. # # given loaded, encouraged keep file # light-weight possible. requiring heavyweight dependencies file # add boot time of test suite on every test run, # individual file may not need of loaded. instead, make # separate helper file requires 1 , use in specs # need it. # # `.rspec` file contains few flags not defaults # users commonly want. # # see http://rubydoc.info/gems/rspec-core/rspec/core/configuration # require 'rspec/rails' # require 'active_support' # require 'active_support/core_ext' require 'rspec/rails' require 'capybara/rails' rspec.configure |config|  # settings below suggested provide initial experience # rspec, feel free customize heart's content.    # these 2 settings work allow limit spec run   # individual examples or groups care tagging them   # `:focus` metadata. when nothing tagged `:focus`, examples   # run.   config.filter_run :focus   config.run_all_when_everything_filtered = true    # many rspec users commonly either run entire suite or individual   # file, , it's useful allow more verbose output when running   # individual spec file.   if config.files_to_run.one?     # use documentation formatter detailed output,     # unless formatter has been configured     # (e.g. via command-line flag).     config.default_formatter = 'doc'   end    # print 10 slowest examples , example groups @   # end of spec run, surface specs running   # particularly slow.   config.profile_examples = 10    # run specs in random order surface order dependencies. if find   # order dependency , want debug it, can fix order providing   # seed, printed after each run.   #     --seed 1234   config.order = :random    # seed global randomization in process using `--seed` cli option.   # setting allows use `--seed` deterministically reproduce   # test failures related randomization passing same `--seed` value   # 1 triggered failure.   kernel.srand config.seed    # rspec-expectations config goes here. can use alternate   # assertion/expectation library such wrong or stdlib/minitest   # assertions if prefer.   config.expect_with :rspec |expectations|     # enable newer, non-monkey-patching expect syntax.     # more details, see:     #   - http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax     expectations.syntax = :expect   end    # rspec-mocks config goes here. can use alternate test double   # library (such bogus or mocha) changing `mock_with` option here.   config.mock_with :rspec |mocks|     # enable newer, non-monkey-patching expect syntax.     # more details, see:     #   - http://teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/     mocks.syntax = :expect      # prevents mocking or stubbing method not exist on     # real object. recommended.     mocks.verify_partial_doubles = true   end    config.include capybara::dsl end 

rails_helper.rb:

# file copied spec/ when run 'rails generate rspec:install' env["rails_env"] ||= 'test' require 'spec_helper' require file.expand_path("../../config/environment", __file__) require 'rspec/rails'  # requires supporting ruby files custom matchers , macros, etc, in # spec/support/ , subdirectories. files matching `spec/**/*_spec.rb` # run spec files default. means files in spec/support end # in _spec.rb both required , run specs, causing specs # run twice. recommended not name files matching glob # end _spec.rb. can configure pattern with --pattern # option on command line or in ~/.rspec, .rspec or `.rspec-local`. dir[rails.root.join("spec/support/**/*.rb")].each { |f| require f }  # checks pending migrations before tests run. # if not using activerecord, can remove line. activerecord::migration.maintain_test_schema!  rspec.configure |config|   # remove line if you're not using activerecord or activerecord fixtures   config.fixture_path = "#{::rails.root}/spec/fixtures"    # if you're not using activerecord, or you'd prefer not run each of   # examples within transaction, remove following line or assign false   # instead of true.   config.use_transactional_fixtures = true    # rspec rails can automatically mix in different behaviours tests   # based on file location, example enabling call `get` ,   # `post` in specs under `spec/controllers`.   #   # can disable behaviour removing line below, , instead   # explicitly tag specs type, e.g.:   #   #     rspec.describe userscontroller, :type => :controller   #       # ...   #     end   #   # different available types documented in features, such in   # https://relishapp.com/rspec/rspec-rails/docs   config.infer_spec_type_from_file_location! end 

when did git push heroku, gave me following error:

       installing rdoc 3.12.2        installing pg 0.15.1        error occurred while installing sqlite3-ruby (1.3.1), , bundler cann ot        continue.        make sure `gem install sqlite3-ruby -v '1.3.1'` succeeds before bund ling.  !  !     failed install gems via bundler.  !  !     detected sqlite3 gem not supported on heroku.  !     https://devcenter.heroku.com/articles/sqlite3  !   !     push rejected, failed compile ruby app  git@heroku.com:sutdweb.git  ! [remote rejected] master -> master (pre-receive hook declined) error: failed push refs 'git@heroku.com:sutdweb.git' 

why push rejected? can shed light on this?

capybara

in gemfile, move capybara out of test gems :

#gemfile gem `capybara` 

heroku install generic , production gems (i.e use bundle install --without test development command)

this mean when use require 'capybara' command without having gem installed in heroku, you'll end error you've received.

-

sqlite

secondly, you're trying install sqlite gem, not supported heroku.

get rid of sqlite gem production gem file this:

#gemfile group :development     gem 'sqlite' end 

this should system install remaining gems working

as mentioned @cupcake, seems gemfile have sqlite in development group - referencing gem gem 'sqlite3-ruby', '1.3.1', :require => 'sqlite3' -> should placed development group too:

#gemfile group :development     gem 'sqlite3-ruby', '1.3.1', :require => 'sqlite3' end 

---

if apply changes gemfile, should perform following steps:

$ git add . $ git commit -a -m "heroku" $ git push heroku master