联系Form Mailer未定义的方法错误轨道

Question

我整个周末都遇到了一些严重的问题，试图让这个基本的联系表格正常工作。

实际上，我希望用户能够填写表格，点击发送并将消息直接发送到预定义的电子邮件地址。

我不断得到的错误是：

  NoMethodError in Messages#new
  Showing C:/Sites/jobapp_v2/app/views/messages/new.html.erb where line #1 raised:
   undefined method `[]' for nil:NilClass
  Extracted source (around line #1):
  1: <%= form_for @message, :url => contact_path do |f| %>
  2: 
  3:    <div class="field">
  4:      <%= f.label :name %>

我有以下设置：

消息控制器

class MessagesController < ApplicationController
def new
   @user = current_user
    @message = Message.new
end
def create
        @message = Message.new(params[:message])
    if  @message.valid?
        NotificationsMailer.new_message(@message).deliver
        redirect_to(root_path, :notice => "Message was successfully sent.")
    else
        flash.now.alert = "Please fill all fields."
    render :new
    end
 end
end

消息模型

 class Message < ActiveRecord::Base
   include ActiveModel::Validations
   include ActiveModel::Conversion
   extend ActiveModel::Naming
   attr_accessor :name, :email, :subject, :body
   validates :name, :email, :subject, :body, :presence => true
   validates :email, :format => { :with => %r{.+@.+..+} }, :allow_blank => true
   def initialize(attributes = {})
 attributes.each do |name, value|
   send("#{name}=", value)
 end
   end
   def persisted?
  false
   end
  end

Routes.rb

 JobappV2::Application.routes.draw do
   devise_for :users
   resources :newsletters
   match "contact" => "messages#new", :as => "contact", :via => :get
   match "contact" => "messages#create", :as => "contact", :via => :post
   get "pages/about"
   get "pages/contact"
   get "pages/terms"
   resources :jobs
   resources :users do
   resources :jobs
   end

   root :to => 'jobs#index'

   end

通知Mailer.rb

 class NotificationsMailer < ActionMailer::Base
   default :from => "[e-mail]"
   default :to => "[e-mail]"
   def new_message(message)
     @message = message
     mail(:subject => "Hello")
   end
 end

视图/notification_mailer/new_message.text.erb

 Name: <%= @message.name %>
 Email: <%= @message.email %>
 Subject: <%= @message.subject %>
 Body: <%= @message.body %>

视图/消息/new.html.erb

  <%= form_for @message, :url => contact_path do |f| %>
<div class="field">
  <%= f.label :name %>
  <%= f.text_field :name %>
</div>
<div class="field">
  <%= f.label :email %>
  <%= f.text_field :email %>
</div>
<div class="field">
  <%= f.label :subject %>
  <%= f.text_field :subject %>
</div>
<div class="field">
  <%= f.label :body %>
  <%= f.text_area :body %>
</div>

<%= f.submit "Send" %>
   <% end %>

我真的根本不知道是什么导致了这个未定义的方法错误，所以人们能提供的任何帮助都将不胜感激！提前感谢：）

Answer 1

连接方式不需要：url=>contact_path

<%= form_for @message do |f| %>

会很好用的。