Rails 4 - 在没有数据库的情况下验证模型 [英] Rails 4 - Validate Model without a database

问题描述

我已经按照本教程尽可能地为 Rails 4 建模.

I've followed this tutorial and molding it as best I can for Rails 4.

http://railscasts.com/episodes/219-active-model?language=en&view=asciicast

class Contact
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming

  validates :name, :email, :phone, :comment, :presence => true

  def initialize(attributes = {})
    attributes.each do |name, value|
      send("#{name}=", value)
    end
  end

  def persisted?
    false
  end

  private
  # Using a private method to encapsulate the permissible parameters is just a good pattern
  # since you'll be able to reuse the same permit list between create and update. Also, you
  # can specialize this method with per-user checking of permissible attributes.
  def contact_params
    params.require(:contact).permit(:name, :email, :phone, :comment)
  end
end

在我的控制器中:

class ContactController < ApplicationController
  def index
    @contact = Contact.new
  end

  def create
    @contact = Contact.new(params[:contact])
    if @contact.valid?
      # Todo send message here.
      render action: 'new'
    end
  end
end

在我看来:

<%= form_for @contact do |f| %>
    <%= f.label :name %>:
    <%= f.text_field :name %><br />

    <%= f.label :email %>:
    <%= f.text_field :email %><br />

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

<小时>

我收到此异常消息:

---

I'm getting this exception message:

undefined method `name' for #<Contact:0x007fd6b3bf87e0>

推荐答案

你必须将它们声明为属性.

you have to declare them as attributes.

attr_accessor :name, email, :phone, :comment

attr_accessor :name, email, :phone, :comment

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