我很难将我的RoR-app部署到Heroku。我已经将数据库更改为postgresql，所以没关系。但我得到了simple_form gem的错误。我在网上尝试了很多不同的方法，但没有去..
以下是错误消息：
rake aborted!
NameError: uninitialized constant SimpleForm
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/config/initializers/simple_form.rb:2:in `<top (required)>'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:652:in `block in load_config_initializer'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/notifications.rb:166:in `instrument'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:651:in `load_config_initializer'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:615:in `each'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:615:in `block in <class:Engine>'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:30:in `instance_exec'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:30:in `run'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:55:in `block in run_initializers'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:44:in `each'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:44:in `tsort_each_child'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:54:in `run_initializers'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:352:in `initialize!'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/config/environment.rb:5:in `<top (required)>'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:328:in `require'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:328:in `require_environment!'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:457:in `block in run_tasks_blocks'
/tmp/build_1b6d5373d9f274355d732fd1b0235bfb/gauteremen-workout_log-965e78a/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.3.0/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define'
Tasks: TOP => environment
(See full trace by running task with --trace)
！ ！预编译资产失败。 ！ ！推送拒绝，无法编译Ruby应用程序
这是在simple_form.rb中添加require'simple_form'之后的新错误消息
LoadError: cannot load such file -- simple_form
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `require'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `block in require'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:240:in `load_dependency'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `require'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/config/initializers/simple_form.rb:1:in `<top (required)>'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:268:in `load'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:268:in `block in load'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:240:in `load_dependency'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:268:in `load'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:652:in `block in load_config_initializer'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/activesupport-4.2.1/lib/active_support/notifications.rb:166:in `instrument'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:651:in `load_config_initializer'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:615:in `each'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/engine.rb:615:in `block in <class:Engine>'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:30:in `instance_exec'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:30:in `run'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:55:in `block in run_initializers'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:44:in `each'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:44:in `tsort_each_child'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/initializable.rb:54:in `run_initializers'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:352:in `initialize!'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/config/environment.rb:5:in `<top (required)>'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:328:in `require'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:328:in `require_environment!'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/railties-4.2.1/lib/rails/application.rb:457:in `block in run_tasks_blocks'
/tmp/build_ed1c1754ca789044f8c2eb91cebaac26/gauteremen-workout_log-cb80141/vendor/bundle/ruby/2.0.0/gems/sprockets-rails-2.3.0/lib/sprockets/rails/task.rb:64:in `block (2 levels) in define'
Tasks: TOP => environment
(See full trace by running task with --trace)
！ ！预编译资产失败。 ！ ！推送拒绝，无法编译Ruby应用程序
答案 0 :(得分：2)
我发现了问题所在。我在Gemfile中放置了正在开发和测试的应用程序中使用的gem。这导致Gems未包含在部署中。我为bootstrap得到了同样的错误，所以下次我将确保在dev和test子句之外添加gems。
感谢您的帮助：）
答案 1 :(得分：0)
我认为你没有在heroku上推送更新的Gemfile和Gemfile.lock。