我有一个相当新的Rails 6安装，我删除了MySQL并将其替换为Mongoid。
当我尝试运行时：rails g devise:install
如您所见，某些内容仍在使用active_record但我在代码中的任何地方都删除了它这是我的堆栈跟踪：
/Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-6.0.0/lib/rails/application/configuration.rb:240:in `database_configuration': Cannot load database configuration:
Could not load database configuration. No such file - ["config/database.yml"] (RuntimeError)
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activerecord-6.0.0/lib/active_record/railtie.rb:200:in `block (2 levels) in <class:Railtie>'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:72:in `class_eval'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:72:in `block in execute_hook'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:62:in `with_execution_control'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:67:in `execute_hook'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:52:in `block in run_load_hooks'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:51:in `each'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-6.0.0/lib/active_support/lazy_load_hooks.rb:51:in `run_load_hooks'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activerecord-6.0.0/lib/active_record/base.rb:327:in `<module:ActiveRecord>'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activerecord-6.0.0/lib/active_record/base.rb:27:in `<top (required)>'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/zeitwerk-2.2.0/lib/zeitwerk/kernel.rb:23:in `require'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/zeitwerk-2.2.0/lib/zeitwerk/kernel.rb:23:in `require'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:370:in `active_record_configured?'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:287:in `disconnect_database'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:111:in `preload'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:157:in `serve'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:145:in `block in run'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:139:in `loop'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application.rb:139:in `run'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/application/boot.rb:19:in `<top (required)>'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/jan/.rbenv/versions/2.6.3/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from -e:1:in `<main>'
如何克服此问题？
(我也删除了/tmp/cache中的所有内容(
这是我application.rb的开始：
require_relative 'boot'
require "rails"
# Pick the frameworks you want:
require "active_model/railtie"
require "active_job/railtie"
require "active_storage/engine"
require "action_controller/railtie"
require "action_mailer/railtie"
require "action_mailbox/engine"
require "action_text/engine"
# require "action_view/railtie"
# require "action_cable/engine"
# require "sprockets/railtie"
# require "rails/test_unit/railtie"
require "sprockets/railtie"
您需要将 Design 配置为使用 mongoid 而不是 ActiveRecord。
添加此
require 'devise/orm/mongoid'
以devise.rb初始值设定项。
有关更多信息，请查看此和此
这是Spring/Rails 6 中的一个错误。请参阅 https://github.com/rails/spring/issues/601。
解决方法是：
- 从您的应用程序中删除 Spring;
- 提供完整的 ActiveRecord 配置，例如使用 sqlite。
此问题仅在开发中发生 - 您不需要生产AR配置，因为不应在生产中加载spring。