rails生成rspec：install config / environments / development.rb：1：在`<top（required）>'：undefined method`configure'

Question

首先，這是我的版本：

Greg-Nowickis-MacBook-Pro:sample_app Greg_Nowicki$ ruby -v
ruby 2.0.0p451 (2014-02-24 revision 45167) [x86_64-darwin13.1.0]
Greg-Nowickis-MacBook-Pro:sample_app Greg_Nowicki$ rails -v
Rails 4.0.4

我正在關注Hartl Rails教程並安裝rspec進行測試。 我已經將gem'rspec-rails'添加到我的gemfile中，當我運行rails生成rspec：install時，這就是我得到的：

Greg-Nowickis-MacBook-Pro:sample_app Greg_Nowicki$ rails generate rspec:install
    /Users/Greg_Nowicki/workspace/railstutorial/sample_app/config/environments/development.rb:1:in `<top (required)>': undefined method `configure' for #<SampleApp::Application:0x007fcd3a47c138> (NoMethodError)
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `block in require'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/engine.rb:590:in `each'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/engine.rb:590:in `block in <class:Engine>'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:30:in `run'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:44:in `each'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:44:in `tsort_each_child'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /Users/Greg_Nowicki/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/application.rb:215:in `initialize!'
from /Users/Greg_Nowicki/workspace/railstutorial/sample_app/config/environment.rb:5:in `<top (required)>'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/application.rb:189:in `require'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/application.rb:189:in `require_environment!'
from /Users/Greg_Nowicki/.rvm/gems/ruby-2.0.0-p451@railstutorial_rails_4_0/gems/railties-4.0.4/lib/rails/commands.rb:44:in `<top (required)>'
from bin/rails:8:in `require'
from bin/rails:8:in `<main>'

這是我的gemfile：

source 'https://rubygems.org'
ruby '2.0.0'


gem 'rails', '4.0.4'

group :development, :test do
  gem 'sqlite3', '1.3.8'
  gem 'rspec-rails', '~> 3.0.0.beta'
end

group :test do
  gem 'selenium-webdriver', '2.35.1'
  gem 'capybara', '2.1.0'
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 do
  gem 'sdoc', '0.3.20', require: false
end

group :production do
  gem 'pg', '0.15.1'
  gem 'rails_12factor', '0.0.2'
end

這是config / environments / development.rb

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports and disable caching.
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # Adds additional error checking when serving assets at runtime.
  # Checks for improperly declared sprockets dependencies.
  # Raises helpful error messages.
  config.assets.raise_runtime_errors = true

  # Raises error for missing translations
  # config.action_view.raise_on_missing_translations = true
end

關於這可能是什么的任何想法？ 我繼續將rspec-rails更新到最新版本 - 想法？

Answer 1

在config / environments / development.rb中：

更改

Rails.application.configure do 

至

SampleApp::Application.configure do

我檢查了幾個我的應用程序，這就是我擁有它們的格式。

Answer 2

改變development.rb根本沒有幫助我。

但是，對我有幫助的是：

$ rvm 2.0.0

在創建應用程序之前

$ rails new first_app

請注意，Gemfile版本是2.0.0，而不是我原來的2.1.1，所以在創建應用程序之前匹配ruby版本。

不確定為什么這很重要。

Answer 3

嘗試使用不同版本的rspec，在Gemfile中將此版本替換為此版本：gem'rspec gem 'rspec-rails', '>= 2.14'

編輯：你有沒有運行bundle install和rails generate rspec:install嘗試運行rspec之前？