嗨，我似乎得到了这个错误，完全被任何人有任何建议？我搜索了这个错误，并没有找到答案，希望有人可以提供帮助 来自浏览器 -
def resolve_all
config = configurations.dup
config.each do |key, value|
config[key] = resolve(value) if value
end
config
-
Started GET "/" for ::1 at 2015-10-06 21:19:43 -0700
NoMethodError (undefined method `each' for "gem 'pg'":String):
activerecord (4.2.3) lib/active_record/connection_adapters/connection_specification.rb:150:in `resolve_all'
activerecord (4.2.3) lib/active_record/connection_handling.rb:69:in `resolve'
activerecord (4.2.3) lib/active_record/core.rb:46:in `configurations='
activerecord (4.2.3) lib/active_record/railtie.rb:117:in `block (2 levels) in <class:Railtie>'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:44:in `each'
activesupport (4.2.3) lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
activerecord (4.2.3) lib/active_record/base.rb:315:in `<module:ActiveRecord>'
activerecord (4.2.3) lib/active_record/base.rb:26:in `<top (required)>'
activerecord (4.2.3) lib/active_record/migration.rb:383:in `connection'
activerecord (4.2.3) lib/active_record/migration.rb:370:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.3) lib/active_support/callbacks.rb:84:in `run_callbacks'
actionpack (4.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
web-console (2.2.1) lib/web_console/middleware.rb:39:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.3) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.3) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.3) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.3) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
actionpack (4.2.3) lib/action_dispatch/middleware/static.rb:116:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties (4.2.3) lib/rails/engine.rb:518:in `call'
railties (4.2.3) lib/rails/application.rb:165:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'
Rendered /Library/Ruby/Gems/2.0.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_source.erb (4.6ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (2.2ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.3ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/actionpack-4.2.3/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (29.8ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/_markup.html.erb (0.5ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (0.4ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (0.4ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/style.css.erb within layouts/inlined_string (0.4ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/console.js.erb within layouts/javascript (25.3ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/main.js.erb within layouts/javascript (0.3ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/error_page.js.erb within layouts/javascript (0.7ms)
Rendered /Library/Ruby/Gems/2.0.0/gems/web-console-2.2.1/lib/web_console/templates/index.html.erb (54.2ms)