因此，当我将rails应用程序运行到生产环境时，这就是我得到的错误。
Booting Puma
=> Rails 5.1.6 application starting in production
=> Run `rails server -h` for more startup options
Exiting
/home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.4.3/lib/devise/rails/routes.rb:500:in `raise_no_secret_key': Devise.secret_key was not set. Please add the following to your Devise initializer: (RuntimeError)
config.secret_key = 'f6dbc12123ce33cd562fc509021181d873aa36e8162c7c45d6a862ad131975e9ab33c3b9c2e56a4f0853e44947e351654bef1cbdb555140adfb69999697268dd'
Please ensure you restarted your application after installing Devise or setting the key.
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.4.3/lib/devise/rails/routes.rb:228:in `devise_for'
from /var/www/events_platform/config/routes.rb:4:in `block in <top (required)>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb:436:in `instance_exec'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb:436:in `eval_block'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.1.6/lib/action_dispatch/routing/route_set.rb:418:in `draw'
from /var/www/events_platform/config/routes.rb:1:in `<top (required)>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `block in load'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application/routes_reloader.rb:55:in `block in load_paths'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application/routes_reloader.rb:55:in `each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application/routes_reloader.rb:55:in `load_paths'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application/routes_reloader.rb:18:in `reload!'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application.rb:164:in `reload_routes!'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/devise-4.4.3/lib/devise/rails.rb:17:in `block in <class:Engine>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:67:in `block in execute_hook'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:49:in `each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.1.6/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application/finisher.rb:66:in `block in <module:Finisher>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/initializable.rb:30:in `instance_exec'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/initializable.rb:30:in `run'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/initializable.rb:59:in `block in run_initializers'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `call'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/initializable.rb:58:in `run_initializers'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/application.rb:353:in `initialize!'
from /var/www/events_platform/config/environment.rb:5:in `<top (required)>'
from config.ru:3:in `require_relative'
from config.ru:3:in `block in <main>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/builder.rb:55:in `instance_eval'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/builder.rb:55:in `initialize'
from config.ru:in `new'
from config.ru:in `<main>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/builder.rb:49:in `eval'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/builder.rb:49:in `new_from_string'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/builder.rb:40:in `parse_file'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/server.rb:319:in `build_app_and_options_from_config'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/server.rb:219:in `app'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:24:in `app'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/server.rb:354:in `wrapped_app'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.5/lib/rack/server.rb:283:in `start'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:44:in `start'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:135:in `block in perform'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:in `tap'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands/server/server_command.rb:130:in `perform'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command/base.rb:63:in `perform'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/command.rb:44:in `invoke'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.1.6/lib/rails/commands.rb:16:in `<top (required)>'
from /var/www/events_platform/bin/rails:9:in `require'
from /var/www/events_platform/bin/rails:9:in `<top (required)>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/ubuntu/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /var/www/events_platform/bin/spring:15:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
我已经查看了stackoverflow中的每个解决方案，但我仍然无法得到答案，所以请不要将此问题标记为重复，我无法找到解决我在stackoverflow中查看其他帖子的问题。
production:
secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
config.sign_out_via = :delete
config.secret_key = ENV['DEVISE_SECRET_KEY'] if Rails.env.production?