Rails未初始化的常量錯誤

Question

在我的開發環境中，頁面可以正常加載。 在生產中，出現此錯誤：

NameError（未初始化的常量EventTypesController :: EventType）：app / controllers / event_types_controller.rb：3：在“索引”中

這是我的控制器：

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>

知道我在做什么錯嗎？

當我在生產控制台中鍵入EventType時，將發生以下情況：

irb（main）：004：0> EventType NameError：來自/home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails中（irb）：4的未初始化常量EventType start' from /home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/console.rb:9:in “從/home/deploy/track/shared/bundle/ruby/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:68:in啟動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中！ 來自/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'來自bin / rails

ByeBug結果：

EventType EventType EventType（id：整數，描述：字符串，created_at：日期時間，Updated_at：日期時間）（byebug）

Answer 1

可能在開發而不是生產中找到EventType表。

您是否已成功將EventType表遷移到生產環境？

$ bin/rails db:migrate RAILS_ENV=production