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我使用rails 3.2和我建立一個嵌套的窗體。但事情並非如我所料。首先，我的模特是一個有很多地址的公司。這裏是模型mongoid和validates_associated不起作用
class Company
include Mongoid::Document
include Mongoid::Timestamps
field :name, :type => String
field :description, :type => String
field :order_minimun, :type => Float
belongs_to :user
has_many :addresses
validates_presence_of :name, :description, :order_minimun
validates_length_of :name, minimum:2, maximum: 30
validates_length_of :description, minimum:5, maximum: 140
validates :order_minimun, :numericality => { :only_integer => true, :greater_than_or_equal_to => 0 }
accepts_nested_attributes_for :addresses
validates_associated :addresses
end
class Address
include Mongoid::Document
include Mongoid::Timestamps
include Mongoid::Spacial::Document
field :street, :type => String
field :number, :type => Integer
field :phone, :type => String
field :location, :type => Array, spacial: {lat: :latitude, lng: :longitude, return_array: true }
embeds_many :delivery_zones
belongs_to :company
belongs_to :city
has_many :openingTimeRange
validates_presence_of :street, :number
validates_length_of :street, minimum:1, maximum: 30
validates_length_of :number, minimum:1, maximum: 6
validates_length_of :phone, minimum:5, maximum: 60
attr_accessible :street, :number, :company_id, :city_id, :location, :phone, :delivery_zones, :latitude, :longitude
end
正如你可以看到公司模型有：
accepts_nested_attributes_for :addresses
validates_associated :addresses
所以，我覺得可以建立一個嵌套的表格。這裏的形式爲
<%= form_for [:admin,@company],:url =>admin_company_path(@company), :html => {:class => "form-horizontal"} do |f|%>
<legend><%= t '.legend' %></legend>
<%= group_input_field f, :name%>
<%= group_field_for f, :description do%>
<%= f.text_area :description, :rows => 5%>
<% end -%>
<%= group_input_field f, :order_minimun%>
<%= f.fields_for :addresses do |builder|%>
<%= render 'address_fields', :f=> builder%>
<% end %>
<div class="form-actions">
<%= f.submit :class => 'btn btn-primary btn-large', :disable_with => t('button.saving') %>
<%= link_to t('.cancel', :default => t("helpers.links.cancel")),
admin_companies_path, :class => 'btn btn-large btn-danger' %>
</div>
<% end %>
的_address_fields.html.erb的代碼
<%= group_input_field f, :street%>
<%= group_input_field f, :number%>
我有一個簡單的輔助，以產生具有自舉
def group_input_field(f,field, options={})
has_error = f.object.errors.has_key? field
klass = has_error ? "control-group error": "control-group"
content_tag(:div, :class => klass) do
f.label(field, :class => 'control-label')+
content_tag(:div, :class => 'controls') do
f.text_field(field, :class => 'input')+
show_error(f.object,field,has_error)+
show_help(options)
end
end
end
Finaly控制器表單字段：
class Admin::CompaniesController < ApplicationController
def new
#crea una nueva compañia
@company = Company.new
end
def edit
@company = Company.find params[:id]
end
def create
@company = Company.new(params[:company])
if @company.save
redirect_to :action => 'index'
else
render 'new'
end
end
def update
@company = Company.find(params[:id])
if @company.update_attributes(params[:company])
redirect_to :action => 'index'
else
render 'edit'
end
end
end
發生了什麼事情。首先，我有一家有兩個地址的公司，我可以編輯第一個地址，但第二個地址的任何更改都不會被保留。然後，地址字段未經驗證（如果我將所有內容都留空，當我再次打開表單時，地址未保存，我可以看到原始值）。並且，當編輯任何地址的字段，並且公司的任何字段值無效時，在表單被提交後，我可以看到公司模型中的錯誤，但地址以原始值顯示，所以編輯的值是丟失。
希望清楚。
在此先感謝。