ruby on rails - ROR未初始化常量ContatosController::Contato

Question

我开始在ROR中开发。我现在正在做的用户历史记录是一个联系人页面。MVC的代码如下所示:

应用程序/控制器/contatos_controller.rb

class ContatosController < ApplicationController
  def new
    @contato = Contato.new
  end
  def create
    @contato = Contato.new(secure_params)
    if @contato.valid?
      flash[:notice] = "Mensagem enviada de #{@contato.name}."
      redirect_to root_path
    else
      render :new
    end
  end
  private
  def secure_params
    params.require(:contato).permit(:name, :subject, :email, :content)
  end
end

应用程序/模型/Contato.rb

class Contato
  include ActiveModel::Model
  attr_accessor :name, :string
  attr_accessor :subject, :string
  attr_accessor :email, :string
  attr_accessor :content, :string
  validates_presence_of :name
  validates_presence_of :subject
  validates_presence_of :email
  validates_presence_of :content
  validates_format_of :email,
    with: /A[-a-z0-9_+.]+@([-a-z0-9]+.)+[a-z0-9]{2,4}z/i
  validates_length_of :content, :maximum => 500
end

app/views/contatos/new.html.erb

<h3>Contato</h3>
<div class="form">
<%= simple_form_for @contato do |form| %>
<%= form.error_notification %>
<%= form.input :name, autofocus: true %>
<%= form.input :subject %>
<%= form.input :email %>
<%= form.input :content, as: :text %>
<%= form.button :submit, 'Submit', class: 'submit' %>
<% end %>
</div>

配置/routes.rb

Rails.application.routes.draw do
  resources :contatos, only: [:new, :create]
  root 'static_pages#home'
end

当我尝试访问http://localhost:3000/contatos/new时，显示以下错误:

NameError in ContatosController#new
uninitialized constant ContatosController::Contato
app/controllers/contatos_controller.rb:4:in `new'

我发现这个错误是与打字错误有关，但这似乎不是我的情况。这可能是一个愚蠢的错误，但我找不到它。有人能帮帮我吗?

Answer 1

正如@Robert在他的评论中已经指出的那样，您需要用小写字母命名您的Contato模型文件。

然而，由于Ruby正在控制器本身(ContatosController::Contato)中寻找您的模型，您可以通过在模型名称之前放置双冒号来解决此问题，如:

@contato = ::Contato.new

这将强制Ruby解释器在"root/top"命名范围中查找Contato模型。