Rails未初始化的常量錯誤

在我的開發環境中，頁面加載正常。在生產中，我得到這個錯誤：Rails未初始化的常量錯誤

NameError (uninitialized constant EventTypesController::EventType): app/controllers/event_types_controller.rb:3:in `index'

這裏是我的控制器：

class EventTypesController < ApplicationController 
    def index 
    @event_types = EventType.all 
    end 

    def update_event_type 
    event_type = EventType.find_by_id(params[:id]) 
    if event_type.update(event_type_params) 
     flash[:notice] = 'Event Type Updated' 
     redirect_to :action => :index 
    end 
    end 

    def create_event_type 
    event_type = EventType.new(event_type_params) 
    if event_type.save 
     flash[:notice] = 'Event Type Created' 
     redirect_to :action => :index 
    end 
    end 

    def destroy_event_type 
    event_type = EventType.find_by_id(params[:id]) 
    if event_type.destroy 
     flash[:notice] = 'Event Type Deleted' 
     redirect_to :action => :index 
    end 
    end 

    def event_type_params 
    params.require('eventtype').permit('description') 
    end 
end

這是我的觀點：

<h1>Event Types</h1> 

<table> 
    <tr> 
    <th>Event Type Description</th> 
    <th></th> 
    </tr> 
    <% @event_types.each do |eventtype| %> 
    <% if params[:edit] && params[:edit] == eventtype.id.to_s %> 
     <tr> 
     <%=form_for :eventtype, :url => {:action => 'update_event_type', :id => eventtype } do |form| -%> 
      <td><%= form.text_field :description %></td> 
      <td><%= submit_tag("Update") %> 
      <%= link_to 'Cancel', {:action => :index} %></td> 
     <%end%> 
     </tr> 
     <%else%> 
     <tr> 
      <td><%= eventtype.description %></td> 
      <td><%=link_to "Edit", {:edit => eventtype.id} %> 
      <%=link_to "Delete", {:action => 'destroy_event_type', :id => eventtype.id},:method => :delete ,data: {confirm:'Are you sure you want to delete this event type?'} %></td> 
     </tr> 
    <%end%> 
    <%end%> 
    <% if !params[:edit] %> 
     <%=form_for :eventtype, :url => {:action => 'create_event_type' } do |form| -%> 
     <tr> 
      <td><%= form.text_field :description %></td> 
      <td><%= submit_tag("Add Event Type") %></td> 
     </tr> 
     <%end%> 
    <%end%> 
</table>

任何想法，我做錯了什麼？

這是當我輸入事件類型投產控制檯會發生什麼：

irb(main):004:0> EventType NameError: uninitialized constant EventType from (irb):4 from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/console.rb:110:in start' from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/console.rb:9:in start' from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:68:in console' from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in run_command!' from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in <top (required)>' from bin/rails:4:in require' from bin/rails

ByeBug結果：

EventType EventType EventType(id: integer, description: string, created_at: datetime, updated_at: datetime) (byebug)

來源

2016-06-22 Devon Quick

您的生產代碼是最新的嗎？您是否在生產中運行'rake db：migrate'？ – mmichael

是的，我做了，我驗證了表是在MySQL中創建的。我也通過SQL手動添加記錄。 –

那很奇怪。我建議你使用一個調試器（例如byebug）來檢查你的索引動作，並檢查是否定義了'EventType'類。對我來說，如果代碼和數據庫是最新的，它可以在本地工作，而不是在生產中，這似乎很奇怪。 – mmichael

也許EventType表在發展，而不是生產中。

您是否已成功將EventType表遷移到生產？

$ bin/rails db:migrate RAILS_ENV=production

來源

2016-06-22 02:36:18

我有跑db：針對生產多次遷移，表中確實存在生產 –

Rails未初始化的常量錯誤

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