地址：类的未定义方法“i18n_key”

Question

我在加载包含表单（如 edit.html.erb 或 new.html.erb）的页面时收到此错误。它冻结在标签上。我需要强调的是，我没有在我的应用程序中使用 ActiveRecord 作为 ORM，而是使用 Perpeuity gem，它是 Datamapper 模式的实现。留下 Activerecord 已经证明有点问题，所以也许有人可以提供帮助。

表格部分：

<%= form_for(@address) do |f| %>
<% if @address.errors.to_a.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@address.errors.count, "error") %> prohibited this address from being saved:</h2>

      <ul>
        <% @address.errors.full_messages.each do |msg| %>
            <li><%= msg %></li>
        <% end %>
      </ul>
    </div>
<% end %>

<div class="row collapse">
  <div class="small-3 columns">
    <% require 'debugger'; debugger %>
    <%= f.label :line1, class: "right inline" %>
  </div>
  <div class="small-7 columns left">
    <%= f.text_field :line1 %>
  </div>
</div>

<div class="row collapse">
  <div class="small-3 columns">
    <%= f.label :line2, class: "right inline" %>
  </div>
  <div class="small-7 columns left">
    <%= f.text_field :line2, :placeholder => "(optional)"  %>
  </div>
</div>
<div class="row collapse">
  <div class="small-3 columns">
    <%= f.label :postcode, class: "right inline" %>
  </div>
  <div class="small-7 columns left">
    <%= f.select :postcode, Address::POSTCODES, :prompt => 'Select a postcode (optional)' %>
  </div>
</div>
<div class="row collapse">
  <div class="small-3 columns">
    <%= f.label :city, class: "right inline" %>
  </div>
  <div class="small-7 columns left">
    <%= f.text_field :city %>
  </div>
</div>
<div class="row collapse">
  <div class="small-3 columns">
    <%= f.label :county, class: "right inline" %>
  </div>
  <div class="small-7 columns left">
    <%= f.select :postcode, Address::COUNTIES, :prompt => 'Select a county (optional)' %>
  </div>
</div>
<div class="row collapse">
  <div class="small-9 small-offset-3 columns">
    <%= f.submit %>
  </div>
</div>

型号：

class Address
  extend ActiveModel::Naming
  extend ActiveModel::Translation
  include Perpetuity::RailsModel

  def errors
    @errors ||= ActiveModel::Errors.new(self)
  end

  def read_attribute_for_validation(attr)
    send(attr)
  end

 def save
   validate!
   errors.empty? ? super : false
 end

 def validate!
   #place custom validations here e.g.
   errors.add(:name, "cannot be blank.") if self.name = ""
   errors.add(:number,"must be less than 7.") if self.number >= 7
 end

 attr_accessor :name, :city, :county, :line1, :line2, :postcode
 attr_reader   :errors

end

具有相关方法的控制器：

class AddressesController < ApplicationController

  def new
    @address = Address.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @address }
    end
  end

  def edit
    #require 'debugger'; debugger
    @address = Perpetuity[Address].find(params[:id])
  end

  def create
    @address = Address.new(params[:address])
    Perpetuity[Address].insert @address

    respond_to do |format|
      if @address.save
        format.html { redirect_to @address, notice: 'Address was successfully created.' }
        format.json { render json: @address, status: :created, location: @address }
      else
        format.html { render action: "new" }
        format.json { render json: @address.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    @address = Perpetuity[Address].find(params[:id])

    respond_to do |format|
      if @address.update_attributes(params[:address])
        format.html { redirect_to @address, notice: 'Address was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @address.errors, status: :unprocessable_entity }
      end
    end
  end
end

我使用的是 Rails 3.2，安装的 ActiveModel gem 版本为 3.2.13。我查看了 gem 代码，但在其中找不到方法 i18n_key，而此处的文档 [link]http://www.rubydoc.info/docs/rails/3.1.1/ActiveModel/Name:i18n_key 表明它应该在其中（类似地在 3.2.8 文档中）。这是一个错误还是我做错了什么？感谢您的帮助。

Answer 1

我收到了这个错误，结果证明我在我的一个类中使用了似乎是保留关键字的东西。就我而言，它是model_name

重命名它为我解决了这个问题。