无法启动Rails服务器-DEPRECATION ERROR

Question

I'm attempting to start my rails server using Cloud9 and am receiving the following message:

DEPRECATION WARNING: The configuration option config.serve_static_assets has been renamed to config.serve_static_files to clarify its role (it merely enables serving everything in the public folder and is unrelated to the asset pipeline). The serve_static_assets alias will be removed in Rails 5.0. Please migrate your configuration files accordingly. (called from at /home/ubuntu/workspace/config/application.rb:25) => Booting WEBrick => Rails 4.2.5 application starting in development on http://0.0.0.0:8080 => Run rails server -h for more startup options => Ctrl-C to shutdown server Exiting /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/connection_adapters/connection_specification.rb:177:in rescue in spec': Specified 'postgresql' for database adapter, but the gem is not loaded. Add rescue in spec': Specified 'postgresql' for database adapter, but the gem is not loaded. Add gem 'pg' to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError) from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/connection_adapters/connection_specification.rb:174:in to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError) from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/connection_adapters/connection_specification.rb:174:in spec' from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/connection_handling.rb:50:in establish_connection' from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/railtie.rb:120:in block (2 levels) in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/lazy_load_hooks.rb:38:in instance_eval' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/lazy_load_hooks.rb:38:in execute_hook' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/lazy_load_hooks.rb:45:in block in run_load_hooks' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/lazy_load_hooks.rb:44:in each' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/lazy_load_hooks.rb:44:in run_load_hooks' from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/base.rb:315:in run_load_hooks' from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/base.rb:315:in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/activerecord-4.2.5/lib/active_record/base.rb:26:in <top (required)>' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in require' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in block in require' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:238:in block in load_dependency' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:647:in new_constants_in' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:238:in load_dependency' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in require' from /home/ubuntu/workspace/app/models/podcast.rb:1:in ' from /usr/local/rvm /gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:457:in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:457:in block in load_file' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:647:in new_constants_in' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:456:in load_file' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:354:in require_or_load' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:494:in load_missing_constant' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:184:in const_missing' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:261:in const_get' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/acti ve_support/inflector/methods.rb:261:in block in constantize' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in each' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in inject' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/inflector/methods.rb:259:in constantize' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:566:in get' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:597:in constantize' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise.rb:315:in get' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/mapping.rb:83:in to' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/mapping.rb:78:in modules' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/mapping.rb:95:in routes' from /usr/local/r vm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/mapping.rb:162:in default_used_route' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/mapping.rb:72:in initialize' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise.rb:345:in new' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise.rb:345:in add_mapping' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/rails/routes.rb:243:in block in devise_for' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/rails/routes.rb:242:in each' from /usr/local/rvm/gems/ruby-2.3.4/gems/devise-4.4.1/lib/devise/rails/routes.rb:242:in devise_for' from /home/ubuntu/workspace/config/routes.rb:7:in block in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in instance_exec' from /usr/local/rvm/gems/ruby-2.3.4/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:434:in eval_block' from /usr/local/rvm/gems/ruby-2.3.4/gems/actionpa ck-4.2.5/lib/action_dispatch/routing/route_set.rb:412:in draw' from /home/ubuntu/workspace/config/routes.rb:1:in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in block in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in load_dependency' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in block in load_paths' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in each' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:40:in load_paths' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:16:in load_paths' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:16:in reload!' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:26:in block in updater' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/file_update_checker.rb:75:in execute' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:27:in updater' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/routes_reloader.rb:7:in execute_if_updated' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application/finisher.rb:69:in block in <module:Finisher>' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/initializable.rb:30:in instance_exec' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/initializable.rb:30:in run' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/initializable.rb:55:in block in run_initializers' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:228:in block in tsort_each' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:350:in block in tsort_each' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:431:in each_strongly_connected_component_from' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:349:in block in each_strongly_connected_component' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in each' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in call' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in each_strongly_connected_component' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:226:in tsort_each' from /usr/local/rvm/rubies/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:205:in tsort_each' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/initializable.rb:54:in run_initializers' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/application.rb:352:in initialize!' from /home/ubuntu/workspace/config/environment.rb:5:in initialize!' from /home/ubuntu/workspace/config/environment.rb:5:in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in require' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in block in require' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in load_dependency' from /usr/local/rvm/gems/ruby-2.3.4/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in require' from /home/ubuntu/workspace/config.ru:3:in block in <main>' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/builder.rb:55:in instance_eval' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/builder.rb:55:in initialize' from /home/ubuntu/workspace/config.ru:in new' from /home/ubuntu/workspace/config.ru:in <main>' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/builder.rb:49:in eval' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/ rack/builder.rb:49:in new_from_string' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/builder.rb:40:in parse_file' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/server.rb:300:in build_app_and_options_from_config' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/server.rb:209:in app' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:61:in app' from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.9/lib/rack/server.rb:337:in wrapped_app' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:139:in log_to_stdout' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:78:in start' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in block in server' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in tap' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rai ls/commands/commands_tasks.rb:75:in server' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in run_command!' from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands.rb:17:in <top (required)>' from /home/ubuntu/workspace/bin/rails:9:in require' from /home/ubuntu/workspace/bin/rails:9:in <top (required)>' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in call' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/command.rb:7:in call' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client.rb:30:in run' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/bin/spring:49:in ' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in load' from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in ' from /home/ubuntu/workspace/bin/spring:15:in require' from /home/ubuntu/workspace/bin/spring:15:in ' from bin/rails:3:in load' from bin/rails:3:in '

Process exited with code: 1

Any idea on how to fix the problem? I ran Bundle Update multiple times with no luck.

Answer 1

Try to the following, edit your Gemfile like below

gem 'pg', '~> 0.20.0'

Or

gem 'pg', '~> 0.11'

Then bundle install and try, it's working on my hand.

Hope it helps