我有rails应用程序ubuntu 18.04。捆绑包安装运行成功，但当我运行rakedb:setup时，它显示
rake中止！KeyError:找不到密钥："URL_HOST"/var/www/myapp/code/config/environments/production.rb:71:in'中的fetch'
/var/www/myapp/code/config/environments/production.rb:71:in块/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/railtie.rb:210:在instance_eval'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/railtie.rb:210:in配置中'/var/www/myapp/code/config/environments/production.rb:3:在<top (required)>'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in中需要'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependence.rb:274:在block in require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:240:in加载依赖项中'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependences.rb:274:在'中的require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/engine.rb:598:in块(2级(中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/engine.rb:597:在'中的each'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/engine.rb:597:in块中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/initializable.rb:30:在instance_exec'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:30:in运行中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/initializable.rb:55:inblock in run_initializers'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:44:ineach'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/initializable.rb:44:intsort_each_child'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:54:inrun_initializers'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/application.rb:352:在initialize!'
/var/www/myapp/code/config/environment.rb:5:in'中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependences.rb:274:在require'中的require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in块中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependences.rb:240:在load_dependency'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in中需要'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.21.11/lib/rails/application.rb:328:在run_tasks_blocks'中的require_environment!'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/application.rb:457:in块中/home/myappuser/.rvm/gems/ruby-2.5.0/gems/rake-13.00/exe/rake:27:在<top (required)>'
/home/myappuser/.rvm/gems/ruby-2.5.0/bin/ruby_executable_hooks:24:ineval'中/home/myappuser/.rvm/gems/ruby-2.5.0/bin/ruby_executable_hooks:24:in"任务：TOP=>db:setup=>db:schema:load_if_ruby=>环境(通过使用--trace运行任务查看完整跟踪(
需要帮助
似乎缺少URL_HOST的一些配置设置。