Rails 4.2.3`method_missing’：未定义的方法`active_record’
我今天尝试创建一个新的Rails应用程序，该应用程序表现得好像ActiveRecord不存在。
我创建了应用程序：
rails new myapp --database=mysql 当运行rake db：create时，我得到：
rake aborted! NoMethodError: undefined method `active_record' for # /Library/Ruby/Gems/2.0.0/gems/railties-4.2.3/lib/rails/railtie/configuration.rb:95:in `method_missing' /Users/richard/Dropbox/Development/myapp/config/application.rb:24:in `' /Users/richard/Dropbox/Development/myapp/config/application.rb:10:in `' /Users/richard/Dropbox/Development/myapp/config/application.rb:9:in `' /Users/richard/Dropbox/Development/myapp/Rakefile:4:in `' (See full trace by running task with --trace)
事实上，如果我注释掉违规行，然后运行rake -T：
... rake cache_digests:dependencies # Lookup first-level dependencies for TEMPLATE (like messages/show or comments/_c... rake cache_digests:nested_dependencies # Lookup nested dependencies for TEMPLATE (like messages/show or comments/_commen... rake doc:app # Generate docs for the app -- also available doc:rails, doc:guides (options: TEM... rake log:clear # Truncates all *.log files in log/ to zero bytes (specify which logs with LOGS=t... rake middleware ...
根本没有rake db：*任务！
我有很多其他Rails应用程序，从Rails 3.x到Rails 4.2.0，它们都运行良好。 它只是这个应用程序，今天创建（和任何新的应用程序）显示此行为。
运行OSX 10.10，Ruby 2.0.0，完全存储Gemfile。
application.rb中：
require File.expand_path('../boot', __FILE__) require 'rails/all' # Require the gems listed in Gemfile, including any gems # you've limited to :test, :development, or :production. Bundler.require(*Rails.groups) module Myapp class Application < Rails::Application # Settings in config/environments/* take precedence over those specified here. # Application configuration should go into files in config/initializers # -- all .rb files in that directory are automatically loaded. # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone. # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC. # config.time_zone = 'Central Time (US & Canada)' # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded. # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s] # config.i18n.default_locale = :de # Do not swallow errors in after_commit/after_rollback callbacks. config.active_record.raise_in_transactional_callbacks = true end end
isl gem的6.0.1版本似乎引起了这个问题，它于昨天在10/10/15更新。 https://rubygems.org/gems/arel/versions/6.0.1
==更新==
作者今天早上用6.0.2解决了这个问题。 https://github.com/rails/arel/issues/375
跑：
bundle update