rake db：setup显示rake中止了！ KeyError：找不到密钥：“ URL_HOST”错误

Question

我有Rails应用ubuntu 18.04。捆绑安装成功运行，但是当我运行rake db：setup时，它显示

耙中止了！KeyError：找不到密钥：“ URL_HOST”/var/www/myapp/code/config/environments/production.rb:71:in

fetch'
/var/www/myapp/code/config/environments/production.rb:71:in

中的“/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/railtie.rb:210:in

instance_eval'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/railtie.rb:210:in

configure'/var/www/myapp/code/config/environments/production.rb:3:in

<top (required)>'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in

require'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in

block in require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:240:in

load_dependency'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274：在

require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/engine.rb:598:in

块（2个级别）中，/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/engine.rb:597:in

each'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/engine.rb:597:in

block in'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:30:in

instance_exec'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:30:in

run'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:55:in

block in run_initializers'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:44:in

each'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:44:in

tsort_each_child'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/initializable.rb:54:in

run_initializers'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/application.rb:352:in

initialize!'
/var/www/myapp/code/config/environment.rb:5:in

'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in

require'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in

block in require'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:240:in

load_dependency'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/activesupport-4.2.11.1/lib/active_support/dependencies.rb:274:in

require'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/application.rb:328:in

require_environment!'
/home/myappuser/.rvm/gems/ruby-2.5.0/gems/railties-4.2.11.1/lib/rails/application.rb:457:in

block in run_tasks_blocks'/home/myappuser/.rvm/gems/ruby-2.5.0/gems/rake-13.0.0/exe/rake:27:in

<top (required)>'
/home/myappuser/.rvm/gems/ruby-2.5.0/bin/ruby_executable_hooks:24:in

eval'/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运行任务来查看完整的跟踪）

需要帮助

Answer 1

似乎缺少URL_HOST的某些配置设置。