以Rails的形式处理MongoMapper EmbeddedDocument [英] Handling MongoMapper EmbeddedDocument in Rails form

问题描述

首先，我是一般的编程新手，而Rails是新手。我选择了Rails，因为它似乎是一种简单的语言。对于我的项目，我在使用MongoMapper和Rails。

我试图用与Document相同的格式处理嵌入式文档。 b

我有以下模型：

  class User 
 include MongoMapper :: Document 
 
 key：email，String，：required => true 
 key：first_name，String 
 key：last_name，String 
 key：role，String 
 many：addresses 
 timestamps！ 
结束
 
类地址
包含MongoMapper :: EmbeddedDocument 
 
 key：location，String 
 key：street，String 
 key：city，String 
 key：zip，Integer 
 key：state，String 
 key：country，String 
 
 end 
  

我想在Document的同时创建/编辑EmbeddedDocument。我尝试过使用fields_for：

 <％f.fields_for：address，@ user.addresses do | address | - ％GT; 
< div class =field> 
<％= address.label：street％>< br /> 
 <％= address.text_field：street％> 
< / div> 
<％end％> 
  

但我得到

未定义的方法`street'for＃< \Array：0x0000010126e3f8>

预先感谢您。

解决方案

fields_for 如果您定义 addresses_attributes = 在用户上。出于某种原因， fields_for 会在您定义该方法时改变其行为。

  def addresses_attributes =（id_and_attrs）
 id_and_attrs.each do | id，attrs | 
 address = self.addresses.find（id）|| self.addresses.build（：id => id）
 address.attributes = attrs 
 end 
 end 
  

未经测试，所以你必须找出结果。特别是，如果地址是全新的，因为用户是新的，我不记得嵌套参数是如何不同的。

First of all, I'm new to programming in general and new to Rails. I picked up Rails because it seems an easy language to start with. For my project I'm using MongoMapper with Rails.

I'm trying to process an Embedded Document in the same form as the Document.

I have the following model:

class User
  include MongoMapper::Document

  key :email, String, :required => true
  key :first_name, String
  key :last_name, String
  key :role, String
  many :addresses
  timestamps!
end

class Address
  include MongoMapper::EmbeddedDocument

  key :location, String
  key :street, String
  key :city, String
  key :zip, Integer
  key :state, String
  key :country, String

end

I want to create/edit the EmbeddedDocument at the same time as the Document. I have tried using fields_for:

<% f.fields_for :address, @user.addresses do |address| -%>
  <div class="field">
    <%= address.label :street %><br />
    <%= address.text_field :street %>
  </div>
<% end %>   

But I get

undefined method `street' for #<\Array:0x0000010126e3f8>

Thank you in advance.

解决方案

fields_for will work if you define addresses_attributes= on User. For some reason fields_for actually changes its behavior if you define that method.

Here's an example implementation:

def addresses_attributes=(id_and_attrs)    
  id_and_attrs.each do |id, attrs|
    address = self.addresses.find(id) || self.addresses.build(:id => id)
    address.attributes = attrs
  end
end

Untested, so you'll have to work out the kinks. In particular, I don't remember how the nested parameters come through differently if the addresses are completely new because the user is new.

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