我有一个Rails应用程序，我试图启动并运行它，但我没有构建此应用程序，但是由于环境恶劣，我不得不这样做。
我实际上对Ruby一无所知，因为它不是我日常使用的编程语言，所以请多多包涵
我设法配置了一个外部数据库以与此应用程序一起使用。在我的database.yml中，我设置了环境变量，并且rake db：create / migrate / seed命令已在我已验证的外部数据库上成功创建了表。
仅出于测试目的，数据库中布置的开发和生产环境都使用了。yml使用外部数据库变量，因此我可以将其排除为无法运行的原因。
Database.yml：
default: &default
adapter: mysql2
encoding: utf8
host: 127.0.0.1
port: 3306
username: root
password: root
development:
<<: *default
database: production
host: <%= ENV['DATABASE_HOST'] %>
port: 3306
username: <%= ENV['DATABASE_USERNAME'] %>
password: <%= ENV['DATABASE_PASSWORD'] %>
production:
<<: *default
database: production
host: <%= ENV['DATABASE_HOST'] %>
port: 3306
username: <%= ENV['DATABASE_USERNAME'] %>
password: <%= ENV['DATABASE_PASSWORD'] %>
如前所述，rake命令可以正常工作，我知道它正在访问外部数据库，因为如果我将密码更改为不正确的密码，rake会给我一个错误
当我运行Rails服务器并尝试访问api时，出现以下错误，起初它无法在127.0.0.1上访问mysql，我认为这很奇怪，因为它应该访问外部数据库，而不是本地主机，然后我在同一台计算机上安装了mysql，然后出现密码错误错误，这显然意味着它正在尝试访问mysql的本地实例，而不是外部实例。我更改了根密码以匹配，现在访问api链接时得到以下密码：
（我混淆了api的名称）
ActiveRecord::NoDatabaseError
Unknown database 'production'
Rails.root: /var/www/html/****-api
Application Trace | Framework Trace | Full Trace
activerecord (4.2.8) lib/active_record/connection_adapters/mysql2_adapter.rb:23:in `rescue in mysql2_connection'
activerecord (4.2.8) lib/active_record/connection_adapters/mysql2_adapter.rb:10:in `mysql2_connection'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:438:in `new_connection'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:448:in `checkout_new_connection'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:422:in `acquire_connection'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:349:in `block in checkout'
/usr/local/rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:348:in `checkout'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:263:in `block in connection'
/usr/local/rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:262:in `connection'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:571:in `retrieve_connection'
activerecord (4.2.8) lib/active_record/connection_handling.rb:113:in `retrieve_connection'
activerecord (4.2.8) lib/active_record/connection_handling.rb:87:in `connection'
activerecord (4.2.8) lib/active_record/migration.rb:383:in `connection'
activerecord (4.2.8) lib/active_record/migration.rb:370:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.8) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
activesupport (4.2.8) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
activesupport (4.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
web-console (2.3.0) lib/web_console/middleware.rb:20:in `block in call'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.8) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.8) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.8) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.10) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.10) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.8) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.10) lib/rack/lock.rb:17:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/static.rb:120:in `call'
rack (1.6.10) lib/rack/sendfile.rb:113:in `call'
rack-cors (1.0.2) lib/rack/cors.rb:97:in `call'
appoptics_apm (4.4.0) lib/appoptics_apm/inst/rack.rb:136:in `metrics_sampling_call'
appoptics_apm (4.4.0) lib/appoptics_apm/inst/rack.rb:40:in `call'
railties (4.2.8) lib/rails/engine.rb:518:in `call'
railties (4.2.8) lib/rails/application.rb:165:in `call'
rack (1.6.10) lib/rack/content_length.rb:15:in `call'
puma (3.12.0) lib/puma/configuration.rb:225:in `call'
puma (3.12.0) lib/puma/server.rb:658:in `handle_request'
puma (3.12.0) lib/puma/server.rb:472:in `process_client'
puma (3.12.0) lib/puma/server.rb:332:in `block in run'
puma (3.12.0) lib/puma/thread_pool.rb:133:in `block in spawn_thread'
Request
Parameters:
None
Toggle session dump
Toggle env dump
GATEWAY_INTERFACE: "CGI/1.2"
HTTP_ACCEPT: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9"
HTTP_ACCEPT_ENCODING: "gzip, deflate, br"
HTTP_ACCEPT_LANGUAGE: "en-GB,en-US;q=0.9,en;q=0.8"
REMOTE_ADDR: "127.0.0.1"
SERVER_NAME: "*****"
SERVER_PROTOCOL: "HTTP/1.1"
Response
Headers:
None
有什么想法吗？我已经尝试了所有我能想到的东西，我不知道为什么它没有从database.yml中提取连接详细信息