Heroku错误：ActionView :: Template :: Error（＃<Message：0x007fc9df016930>的未定义方法'captcha'）

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，它给我以下错误：“很抱歉，出了点问题。如果您是应用程序所有者，请检查日志以获取更多信息。”

当我检查“ heroku日志”时，发现以下错误消息：ActionView :: Template :: Error（针对-Message：0x007fc9df016930-的未定义方法“验证码”）

HTML表单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 %>

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

讯息模型

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

讯息控制器

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

迁移讯息

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

架构图

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

路线

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

网站

http://ChrisPelnar.com