我正在尝试运行从Minitest迁移到Rspec的一组测试。尝试运行控制器规范时，出现以下错误：

An error occurred while loading rails_helper.
Failure/Error: require File.expand_path('../config/environment',__dir__)

NameError:
  uninitialized constant activeRecord::Relation
# /var/lib/gems/2.6.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:79:in `block in load_missing_constant'
# /var/lib/gems/2.6.0/gems/bootsnap-1.4.4/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'

以下是相关文件：

spec / controllers / cdns_controller_spec.rb

RSpec.describe CdnsController,type: :controller do


  let(:cdn) { cdns :one }

  it "gets index" do
    get :index
    value(response).must_be :success?
    value(assigns(:cdns)).wont_be :nil?
  end
end

这是我的rails-helper.rb。这是很标准的。

require 'simplecov'
SimpleCov.start 'rails' do
add_filter '/bin/'
 add_filter '/db/'
 add_filter '/test/'
 add_filter '/config/'
 add_group "Models","app/models"
 add_group "Controllers","app/controllers"
 add_group "Helpers","app/helpers"
 add_group "Lib","lib/"
end

# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'

require File.expand_path('../config/environment',__dir__)

# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?
require 'rspec/rails'
require 'support/factory_bot'
require 'database_cleaner'
# Add additional requires below this line. Rails is not loaded until this point!

# Requires supporting ruby files with custom matchers and macros,etc,in
# spec/support/ and its subdirectories. Files matching `spec/**/*_spec.rb` are
# run as spec files by default. This means that files in spec/support that end
# in _spec.rb will both be required and run as specs,causing the specs to be
# run twice. It is recommended that you do not name files matching this glob to
# end with _spec.rb. You can configure this pattern with the --pattern
# option on the command line or in ~/.rspec,.rspec or `.rspec-local`.
#
# The following line is provided for convenience purposes. It has the downside
# of increasing the boot-up time by auto-requiring all files in the support
# directory. Alternatively,in the individual `*_spec.rb` files,manually
# require only the support files necessary.
#

Dir[Rails.root.join('spec','support','**','*.rb')].each { |f| require f }

# Checks for pending migrations and applies them before tests are run.
# If you are not using activeRecord,you can remove these lines.

begin
  activeRecord::Migration.maintain_test_schema!
rescue activeRecord::PendingMigrationError => e
  puts e.to_s.strip
  exit 1
end

RSpec.configure do |config|
  # Remove this 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 to run each of your
  # examples within a transaction,remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = true

  # RSpec Rails can automatically mix in different behaviours to your tests
  # based on their file location,for example enabling you to call `get` and
  # `post` in specs under `spec/controllers`.
  #
  # You can disable this behaviour by removing the line below,and instead
  # explicitly tag your specs with their type,e.g.:
  #
  #     RSpec.describe UsersController,:type => :controller do
  #       # ...
  #     end
  #
  # The different available types are documented in the features,such as in
  # https://relishapp.com/rspec/rspec-rails/docs

  config.infer_spec_type_from_file_location!

  # Filter lines from Rails gems in backtraces.
  config.filter_rails_from_backtrace!
  # arbitrary gems may also be filtered via:
  # config.filter_gems_from_backtrace("gem name")

  config.before(:suite) do
    Databasecleaner.strategy = :transaction
    Databasecleaner.clean_with(:truncation)
  end

  config.around(:each) do |example|
    Databasecleaner.cleaning do
      example.run
    end
  end

end

这是我的spec_helper.rb。这也是相当标准的。

RSpec.configure do |config|

  config.expect_with :rspec do |expectations|

    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end


  config.mock_with :rspec do |mocks|

    mocks.verify_partial_doubles = true
  end


   config.shared_context_metadata_behavior = :apply_to_host_groups
end

最后是我的.rspec

--require rails_helper

我想指出的是，这些都是从以下错误开始的：

NoMethodError:
   undefined method `get' for #<RSpec::ExampleGroups::CdnsController:0x0000000000ed87d0>

为解决“获取”错误，我尝试将.rspec的内容从require spec_helper更改为require rails_helper。该修补程序触发了activeRecord：Relation错误。从那时起，我一直在尝试使用RSpec来推断控制器规格选项，显式指定type: :controller，然后将其删除，现在到了我希望有人能帮助我找出问题所在的地方。我可以告诉您某些内容加载不正确，可以使用一些帮助。如果需要更多信息，我将很乐意提供。谢谢。