具有双重关联的 Rails 4 嵌套形式

Question

我有一个这样的订单模型：

class Order < ActiveRecord::Base
  belongs_to :service_address, class_name: 'Address'
  belongs_to :billing_address, class_name: 'Address'

  accepts_nested_attributes_for :service_address, allow_destroy: true
  accepts_nested_attributes_for :billing_address, allow_destroy: true
end

class Address < ActiveRecord::Base

end

我正在努力使嵌套表单工作，以允许我以相同的表单添加两个地址。 Order 的 params 部分是这样的：

params.require(:order).permit(:contract_id, :billing_address_id, :service_address_id, :valid_from, :valid_to, :contact_person_id, :billing_mode,
                                service_address: [:city_id, :street_id, :number, :block, :entrance, :floor, :apartment, :_destroy],
                                billing_address: [:city_id, :street_id, :number, :block, :entrance, :floor, :apartment, :_destroy])

我的创建动作是这样的：

@order = Order.new(order_params)
@order.service_address = Address.new(params[:order][:service_address])
@order.billing_address = Address.new(params[:order][:billing_address])

以这种方式提交时，表单不会验证，billing_address 的所有字段都被突出显示为不完整。

如果我使用service_address_params 和billing_adress_params，我会收到undefined local variable or method 'service_address_params' 的错误

我被困在这里两天，所以任何帮助将不胜感激。

编辑：new

def new
  @order = Order.new
  @order.service_address = Address.new
  @order.billing_address = Address.new
end

编辑：form

<%= simple_form_for @order, data: {validate: 'parsley'} do |f| %>
  <%= f.input :contract_id, as: :hidden, :input_html => { :value => @contract_id } %>
  <%= f.input :same_billing_address, as: :hidden, :input_html => { :value => 0 } %>

  <%= f.error_notification %>

  <%= render :partial => 'order_data', :locals => { f: f } %>
  <%= render :partial => 'service_address' %>
  <%= render :partial => 'billing_address' %>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

地址的一部分：

<%= simple_fields_for :service_address do |sa| %>
  <div class="form-inputs" id="inputs-step2">
    <%= sa.input :city_id, label: 'Oras', collection: @cities, input_html: { 'data-parsley-group' => "block2", :required => true, id: 'service_address_city_id' } %>
    <%= sa.input :street_id, label: 'Strada', collection: @streets, input_html: { 'data-parsley-group' => "block2", :required => true, id: 'service_address_street_id' } %>
    <%= sa.input :number, label: 'Numar', input_html: { 'data-parsley-group' => "block2", :required => true } %>
    <%= sa.input :block, label: 'Bloc' %>
    <%= sa.input :entrance, label: 'Scara' %>
    <%= sa.input :floor, label: 'Etaj' %>
    <%= sa.input :apartment, label: 'Apartament' %>
  </div>
<% end %>

帐单地址部分：

<%= simple_fields_for :billing_address do |ba| %>
  <div class="form-inputs" id="inputs-step3">
    <%= ba.input :city_id, label: 'Oras', collection: @cities, input_html: { 'data-parsley-group' => "block3", :required => true, id: 'billing_address_city_id' } %>
    <%= ba.input :street_id, label: 'Strada', collection: @streets, input_html: { 'data-parsley-group' => "block3", :required => true, id: 'billing_address_street_id' } %>
    <%= ba.input :number, label: 'Numar', input_html: { 'data-parsley-group' => "block3", :required => true } %>
    <%= ba.input :block, label: 'Bloc' %>
    <%= ba.input :entrance, label: 'Scara' %>
    <%= ba.input :floor, label: 'Etaj' %>
    <%= ba.input :apartment, label: 'Apartament' %>
  </div>
<% end %>

参数哈希：

--- !ruby/hash:ActionController::Parameters
utf8: ✓
authenticity_token: nZvowtR+Iwo/Rt420w55ZSzNtiZCrjga57dSimDPdg0=
order: !ruby/hash:ActionController::Parameters
  contract_id: ''
  same_billing_address: '0'
  valid_from: '2013-08-04'
  months: '12'
  billing_mode: '1'
service_address: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  city_id: '1'
  street_id: '19'
  number: '1'
  block: '1'
  entrance: '1'
  floor: '1'
  apartment: '1'
billing_address: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  city_id: '1'
  street_id: '19'
  number: '2'
  block: '2'
  entrance: '2'
  floor: '2'
  apartment: '2'
commit: Create Order
action: create
controller: orders

Answer 1

首先，将accepts_nested_attributes_for 与belongs_to 一起使用是一种痛苦，也相当棘手。其次，代码中有很多错误。我会一一解释。

错误 #1

你的new方法应该是这样的

def new
  @order = Order.new
  @order.build_service_address 
  @order.build_billing_address
end

在您的create 方法中，您不需要这些行，请将它们删除。

@order.service_address = Address.new(params[:order][:service_address])
@order.billing_address = Address.new(params[:order][:billing_address])

错误 #2

你的order_params方法应该是这样的

def order_params
 params.require(:order).permit(:contract_id, :billing_address_id, :service_address_id,    :valid_from, :valid_to, :contact_person_id, :billing_mode,service_address_attributes: [:city_id, :street_id, :number, :block, :entrance, :floor, :apartment, :_destroy],billing_address_attributes: [:city_id, :street_id, :number, :block, :entrance, :floor, :apartment, :_destroy])
end

注意 service_address_attributes 和 billing_address_attributes 的变化

错误 #3

您没有将locals 传递给您的service_address 和billing_address 部分。

这些行

<%= render :partial => 'service_address' %>
<%= render :partial => 'billing_address' %>

应该是这样的

<%= render :partial => 'service_address',:locals => { f: sa }%>
<%= render :partial => 'billing_address',:locals => { f: ba } %>

更新

尝试在main form 中像这样调用partials

<%= f.simple_fields_for :service_address do |sa| %>
  <%= render :partial => 'service_address',:locals => { f: sa }%>
<% end %>

<%= f.simple_fields_for :billing_address do |ba| %>
  <%= render :partial => 'billing_address',:locals => { f: ba } %>
<% end %>

并像这样更改service_address 和billing_address partials 中的代码

#_service_address.html.erb
<div class="form-inputs" id="inputs-step2">
    <%= f.input :city_id, label: 'Oras', collection: @cities, input_html: { 'data-parsley-group' => "block2", :required => true, id: 'service_address_city_id' } %>
    <%= f.input :street_id, label: 'Strada', collection: @streets, input_html: { 'data-parsley-group' => "block2", :required => true, id: 'service_address_street_id' } %>
    <%= f.input :number, label: 'Numar', input_html: { 'data-parsley-group' => "block2", :required => true } %>
    <%= f.input :block, label: 'Bloc' %>
    <%= f.input :entrance, label: 'Scara' %>
    <%= f.input :floor, label: 'Etaj' %>
    <%= f.input :apartment, label: 'Apartament' %>
  </div>

#_billing_address.html.erb
<div class="form-inputs" id="inputs-step3">
    <%= f.input :city_id, label: 'Oras', collection: @cities, input_html: { 'data-parsley-group' => "block3", :required => true, id: 'billing_address_city_id' } %>
    <%= f.input :street_id, label: 'Strada', collection: @streets, input_html: { 'data-parsley-group' => "block3", :required => true, id: 'billing_address_street_id' } %>
    <%= f.input :number, label: 'Numar', input_html: { 'data-parsley-group' => "block3", :required => true } %>
    <%= f.input :block, label: 'Bloc' %>
    <%= f.input :entrance, label: 'Scara' %>
    <%= f.input :floor, label: 'Etaj' %>
    <%= f.input :apartment, label: 'Apartament' %>
  </div>