Heroku错误：ActionView :: Template :: Error（未定义方法`captcha'for＃< Message：0x007fc9df016930>） [英] Heroku Error: ActionView::Template::Error (undefined method `captcha' for #<Message:0x007fc9df016930>)

问题描述

在我的本地环境中一切正常。当我尝试部署到heroku并最初查看我的网站时，它给了我以下错误：我们很抱歉，但出错了。如果您是应用程序所有者，请查看日志以获取更多信息。

当我检查我的heroku日志时，发现此错误消息： ActionView :: Template :: Error（未定义方法`captcha'for -Message： 0x007fc9df016930 - ）

HTML表单视图/网页/ index.html.erb

 <％= form_for（@message）do | f | ％GT; 
<％= f.text_field：first_name，：class => message_name_input message_input_default，：placeholder => 名字％> 
< br>< br> 
<％= f.text_field：last_name，：class => message_name_input message_input_default，：placeholder => 姓氏％> 
< br>< br> 
 <％= f.text_field：email，：required => true，：class => message_email_input message_input_default，：placeholder => *电子邮件％> 
< br>< br> 
 <％= f.text_area：user_message，：required => true，：class => message_user-message_input，：placeholder => *写信息％>< br>< br> 
 
 <％= f.text_field：captcha，：required => true，：class => message_input_default，：placeholder => *＃{@ a} +＃{@ b} =？ ％GT;<峰; br><峰; br> 
 
< div id =RecaptchaField2>< / div> 
 
<％= f.submitSend，：class => messages_submit_button％> 
 
<％end％> 
  

页面控制器

  class PagesController< ApplicationController 
 
 def index 
 @message = Message.new 
 
 @a = rand（9）
 
 @b = rand（9 ）
 session [sum] = @a + @b 
 end 
 
 end 
  

消息模型

  class Message< ActiveRecord :: Base 
 validates：email，：user_message，presence：true 
 end 
  

< blockquote>

Messages Controller

  class MessagesController< ApplicationController 
 
 
 def show 
 end 
 
 def new 
 @message = Message.new 
 end 
 
 def创建
 @message = Message.new（message_params）
 if params [：message] [：captcha] .to_i == session [sum]&& @ message.save 
 UserMailer.welcome_email（@message）.deliver_now 
 redirect_to'/ message_sent'
 else 
 redirect_to'/'
 end 
 end 
 
 private 
 def message_params 
返回params.require（：message）.permit（：first_name，：last_name，：email，：user_message，：captcha）
 end 
 
 
 end 
  

消息迁移

  class CreateMessages< ActiveRecord :: Migration 
 def change 
 create_table：messages do | t | 
 t.string：first_name 
 t.string：last_name 
 t.string：电子邮件
 t.string：user_message 
 t.string：验证码
 t .timestamps null：false 
 end 
 end 
 end 
  

架构

  ActiveRecord :: Schema.define（version：20150712164426） do 
 
＃这些是为了支持这个数据库必须启用的扩展名
 enable_extensionplpgsql
 
 create_tableadmins，force：：cascade do | T | 
 t.stringemail，默认值：，null：false 
 t.stringencrypted_pa​​ssword，默认值：，null：false 
 t.stringreset_password_token
 t.datetimereset_password_sent_at
 t.datetimeremember_created_at
 t.integersign_in_count，默认值：0，null：false 
 t.datetimecurrent_sign_in_at
 t.datetimelast_sign_in_at
 t.inetcurrent_sign_in_ip
 t.inetlast_sign_in_ip
 t.datetimecreated_at
 t.datetimeupdated_at
结束
 $ b $ add_indexadmins，[email]，名称：index_admins_on_email，unique：true，使用:: btree 
 add_indexadmins，[reset_password_token]，名称：index_admins_on_reset_password_token，unique：true，使用：：btree 
 
 create_tablemessages，force：：cascade do | t | 
 t.stringfirst_name
 t.stringlast_name
 t.stringemail
 t.stringuser_message
 t.stringcaptcha 
 t.datetimecreated_at，null：false 
 t.datetimeupdated_at，null：false 
结束
 $ b $结束
  
 $ b 
 
 
路线
 
 
 
 
 
  Rails.application.routes.draw执行
 devise_for：admins 
资源：页面
资源：消息
资源：管理员
 
 get'/'=> 'pages＃index'
 get'/ new'=> 'messages＃new'
 post'/ message_sent'=> 'messages＃create'
 get'/ message_sent'=> 'messages＃show'
 end 
  
 
 
 
 
 
网站
 
 
 
 
 
  http://ChrisPelnar.com 
  
 
 
解决方案
也许你在最初运行 heroku run rake后添加了 captcha  db：migrate 第一次包含该迁移？如果是这种情况，您需要重置数据库（请注意，这将清除所有数据） 
 
  heroku pg：reset DATABASE 
  
然后再次使用
 $进行迁移b 
 $ b 
  heroku run rake db：migrate 
  
在这些之后， captcha 也应该在Heroku上可用。
 

  
Everything is working correctly in my local environment. When I try to deploy to heroku and view my site initially it gives me the following error: "We're sorry, but something went wrong. If you are the application owner check the logs for more information." 
  
  
When I check my "heroku logs", I find this error message: ActionView::Template::Error (undefined method `captcha' for -Message:0x007fc9df016930-)
  
  
HTML form views/pages/index.html.erb


  <%= form_for(@message) do |f| %>
  <%= f.text_field :first_name, :class => "message_name_input message_input_default", :placeholder => " First Name" %>
  <br><br>
  <%= f.text_field :last_name, :class => "message_name_input message_input_default", :placeholder => " Last Name" %>
  <br><br>
  <%= f.text_field :email, :required => true, :class => "message_email_input message_input_default", :placeholder => " * Email" %>
  <br><br>
  <%= f.text_area :user_message, :required => true, :class => "message_user-message_input", :placeholder => " * Write a message" %><br><br>

  <%= f.text_field :captcha, :required => true, :class => "message_input_default", :placeholder => " * #{@a} + #{@b} = ?" %><br><br>

  <div id="RecaptchaField2"></div>

  <%= f.submit "Send", :class => "messages_submit_button" %>

  <% end %>



  
Pages Controller


class PagesController < ApplicationController

  def index
    @message = Message.new

     @a = rand(9)

     @b = rand(9)
   session["sum"] = @a + @b
  end

end



  
Message Model


class Message < ActiveRecord::Base
  validates :email, :user_message, presence: true
end



  
Messages Controller


class MessagesController < ApplicationController


  def show
  end

  def new
    @message = Message.new
  end

  def create
  @message = Message.new(message_params)
    if params[:message][:captcha].to_i == session["sum"] && @message.save
      UserMailer.welcome_email(@message).deliver_now
      redirect_to '/message_sent'
    else
      redirect_to '/'
    end
  end

    private
  def message_params
    return params.require(:message).permit(:first_name, :last_name, :email, :user_message, :captcha)
  end


end



  
Messages Migration


class CreateMessages < ActiveRecord::Migration
  def change
    create_table :messages do |t|
      t.string :first_name
      t.string :last_name
      t.string :email
      t.string :user_message
      t.string :captcha
      t.timestamps null: false
    end
  end
end



  
Schema


ActiveRecord::Schema.define(version: 20150712164426) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

  create_table "admins", force: :cascade do |t|
    t.string   "email",                  default: "", null: false
    t.string   "encrypted_password",     default: "", null: false
    t.string   "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",          default: 0,  null: false
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.inet     "current_sign_in_ip"
    t.inet     "last_sign_in_ip"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  add_index "admins", ["email"], name: "index_admins_on_email", unique: true, using: :btree
  add_index "admins", ["reset_password_token"], name: "index_admins_on_reset_password_token", unique: true, using: :btree

  create_table "messages", force: :cascade do |t|
    t.string   "first_name"
    t.string   "last_name"
    t.string   "email"
    t.string   "user_message"
    t.string   "captcha"
    t.datetime "created_at",   null: false
    t.datetime "updated_at",   null: false
  end

end



  
Routes


Rails.application.routes.draw do
  devise_for :admins
  resources :pages
  resources :messages
  resources :admins

  get '/' => 'pages#index'
  get '/new' => 'messages#new'
  post '/message_sent' => 'messages#create'
  get '/message_sent' => 'messages#show'
end



  
WebSite


http://ChrisPelnar.com

解决方案
Maybe you added the captcha column after originally running heroku run rake db:migrate the first time with that migration included? If that is the case, you need to reset the database (Please note that this will clear all the data) with
heroku pg:reset DATABASE
and then migrate it again with
heroku run rake db:migrate
After these the captcha should be available on Heroku too.

                        
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