导轨+ MongoID +简单的表单关联：未定义的方法`选择'为＃＆LT; Mongoid ::关系::元 [英] Rails + MongoID + Simple Form in association: undefined method `options' for #<Mongoid::Relations::Metadata

问题描述

我有以下的车型基本上指的教训和类别。每节课可以有一个类别，每个类别被嵌入的一课。

 类课程
  包括Mongoid ::文件  现场：标题：类型=＆GT;串
  现场：类别，：类型=＆GT;串
  现场：价格：类型=＆GT;整数
  现场：描述：类型=＆GT;串
  现场：USER_ID，：类型=＆GT;串
  validates_ presence_of：标题
  validates_ presence_of：类别
  validates_ presence_of：价格
  validates_ presence_of：USER_ID  validates_numericality_of：价格  attr_accessible：标题，：类别：说明，：价格  embeds_one：类别
结束
类类别
  包括Mongoid ::文件
  现场：名称，类型：字符串  embedded_in：教训
结束
 

和我有一个这样的形式：

 ＆LT;％= simple_form_for @lesson，：HTML = GT; {：类=＆GT; '好'}做| lesson_form | ％GT;
＆LT;％如果lesson_form.error_notification％GT;
    ＆LT; D​​IV CLASS =＆GT警报警报错误淡入
      ＆LT;一类=关闭数据解雇=警示的href =＃＆GT;＆安培;倍;＆LT; / A＆GT;
      ＆所述;％= lesson_form.error_notification％GT;
    ＆LT; / DIV＆GT;
＆LT;％结束％GT;
  ＆LT;％= lesson_form.input：标题％GT;
  ＆LT;％= lesson_form.input：类别％GT;
  ＆LT;％= lesson_form.input：描述％GT;
  ＆LT;％= lesson_form.input：价格％GT;
  ＆LT;％= lesson_form.association：类别％GT;
  ＆LT;％= lesson_form.button：提交：标签=＆GT; 创建，：类=＆GT; BTN BTN-主要BTN-大'％GT;
＆LT;％结束 - ％GT;
 

当试图渲染的形式，我得到这个错误：

 未定义的方法'选项'的＃＆LT; Mongoid ::关系::元数据：0x000000049dc958＆GT;
 

有什么想法我怎么能显示的类别名称以这种形式？

修改

我已经改变了这一行：＆LT;％= lesson_form.association：类别％＆GT;

有关这一个：＆LT;％= lesson_form.input：类别：收集= GT; Category.all％GT;

但尝试加载我得到的表单时：

 访问集合类是不允许的，因为它是一个嵌入式的文档，请从根文件访问的集合。
 

解决方案

不幸的是，似乎 SimpleForm 没有按'科技支撑奥姆斯比其他的ActiveRecord（见例如这个问题）。对不起，这不是一个很好的回答你的问题：/

I have the following models which basically refer to Lessons and Categories. Each lesson can have one category, and each category is embedded in a lesson.

class Lesson
  include Mongoid::Document

  field :title, :type => String
  field :category, :type => String
  field :price, :type => Integer
  field :description, :type => String
  field :user_id, :type => String


  validates_presence_of :title
  validates_presence_of :category
  validates_presence_of :price
  validates_presence_of :user_id

  validates_numericality_of :price

  attr_accessible :title, :category, :description, :price

  embeds_one :category
end


class Category
  include Mongoid::Document
  field :name, type: String

  embedded_in :lesson
end

And I have a form like this:

<%= simple_form_for @lesson, :html => { :class => 'well' } do |lesson_form| %>
<% if lesson_form.error_notification %>
    <div class="alert alert-error fade in">
      <a class="close" data-dismiss="alert" href="#">&times;</a>
      <%= lesson_form.error_notification %>
    </div>
<% end %>
  <%= lesson_form.input :title %>
  <%= lesson_form.input :category %>
  <%= lesson_form.input :description %>
  <%= lesson_form.input :price %>
  <%= lesson_form.association :category %>
  <%= lesson_form.button :submit, :label => 'Create', :class => 'btn btn-primary btn-large' %>
<% end -%>

When trying to render that form, I get this error:

undefined method `options' for #<Mongoid::Relations::Metadata:0x000000049dc958>

Any thoughts how can I show the categories names in that form?

EDIT:

I have changed this line: <%= lesson_form.association :category %>

For this one: <%= lesson_form.input :category, :collection => Category.all %>

But when trying to load the form I get:

Access to the collection for Category is not allowed since it is an embedded document, please access a collection from the root document.

解决方案

Unfortunately it appears SimpleForm doesn't support ORMs other than ActiveRecord (see this issue for example). Sorry this isn't a very good 'answer' to your question :/

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