Ruby on Rails - Actionpack：错误的参数类型类（预期模块）（TypeError）答案

【问题标题】：Ruby on Rails - Actionpack: wrong argument type Class (expected Module) (TypeError)Ruby on Rails - Actionpack：错误的参数类型类（预期模块）（TypeError）
【发布时间】：2016-01-17 17:26:06
【问题描述】：

我在使用 Rails 和 heroku 时遇到了这个问题：在我的电脑上一切正常，但是由于这个错误，heroku 上的同一个应用程序不起作用：

/app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `include': wrong argument type Class (expected Module) (TypeError)

我在这里粘贴完整的堆栈跟踪：

$: heroku run rails console
Running rails console on myapp... up, run.4782
/app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `include': wrong argument type Class (expected Module) (TypeError)
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `block in add_template_helper'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `module_eval'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:180:in `add_template_helper'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:109:in `block in helper'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:108:in `each'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/abstract_controller/helpers.rb:108:in `helper'
    from /app/vendor/bundle/ruby/2.2.0/gems/actionpack-4.2.4/lib/action_controller/railties/helpers.rb:17:in `inherited'
    from /app/app/controllers/application_controller.rb:1:in `<top (required)>'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `require'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `block in require'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:274:in `require'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:360:in `require_or_load'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:317:in `depend_on'
    from /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:233:in `require_dependency'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:472:in `block (2 levels) in eager_load!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:471:in `each'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:471:in `block in eager_load!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:469:in `each'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:469:in `eager_load!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/engine.rb:346:in `eager_load!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application/finisher.rb:56:in `each'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `instance_exec'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:30:in `run'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `call'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
    from /app/vendor/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/initializable.rb:54:in `run_initializers'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:352:in `initialize!'
    from /app/config/environment.rb:5:in `<top (required)>'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:328:in `require'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/application.rb:328:in `require_environment!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:142:in `require_application_and_environment!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:67:in `console'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
    from /app/bin/rails:8:in `require'
    from /app/bin/rails:8:in `<main>'

我不知道会是什么！

你能给我一些帮助吗？

【问题讨论】：

你能发布 application_controller 中的内容吗？
非常简单的application_controller：class ApplicationController < ActionController::Base protect_from_forgery with: :exception end
嗯，不多 :) 你在应用程序的任何地方都包含任何模块吗？
不，我的应用很简单，我的应用中没有包含任何模块

标签： ruby-on-rails ruby ruby-on-rails-4 heroku actionpack

【解决方案1】：

错误表明其中一个帮助文件被定义为一个类而不是一个模块。

class ApplicationHelper
end

vs.

module ApplicationHelper
end

【讨论】：