Ruby on Rails中的嵌套表单没有可见的字段

Question

我正在尝试为具有多个账单地址和邮政addresses.When的客户配置文件创建嵌套组。我浏览到客户配置文件表单，看到客户配置文件表单的字段，但没有看到账单地址表单或邮政地址表单的任何字段。有什么想法吗？下面是我的控制器，模型和视图。

我们的目标是有一个客户配置文件，可以多个帐单地址和多个邮政地址。

客户资料模型：

    class CustomerProfile < ActiveRecord::Base
        #These entries are required to create a nested model form (multiple models in one form)
        validates_presence_of :customerNumber
        validates_uniqueness_of :customerNumber


        has_many :billing_addresses, :dependent => :destroy
        has_many :postal_addresses,  :dependent => :destroy

        accepts_nested_attributes_for :billing_addresses, :reject_if => lambda { |a| a[:content].blank?}, :allow_destroy => true
        accepts_nested_attributes_for :postal_addresses, :reject_if => lambda { |a| a[:content].blank?}, :allow_destroy => true
    end

计费地址模型：

    class BillingAddress < ActiveRecord::Base
        belongs_to :customer_profile
        attr_protected :customerNumber
    end

邮寄地址模型：

    class PostalAddress < ActiveRecord::Base
        belongs_to :customer_profile
        attr_protected :customerNumber
    end

客户配置文件控制器：

    def new
        @customer_profile = CustomerProfile.new

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


    def create
        @customer_profile = CustomerProfile.new(params[:customer_profile])

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

客户简档表单：

    <br />
    <h3>Add new customer profile with Billing and Postal Address</h3>
    <br />
    <h4> Customer Profile </h4>
    <%= form_for @customer_profile do |f| %>
        <div class="field">
            <%= f.label :customerNumber %><br />
            <%= f.text_field :customerNumber %>
        </div>

        #.... a few other fields removed to keep this short

    <br />
        <h4> Billing Address </h4>
        <%= f.fields_for :billing_addresses do |b| %>

            <div class="field">
                <%= b.label :addressLine1 %><br />
                <%= b.text_field :addressLine1 %>
            </div>

        #.... a few other fields removed to keep this short

        <% end %>

        <br />
        <h4> Postal Address </h4>
        <br />
        <%= f.fields_for :postal_addresses do |p| %>

            <div class="field">
                <%= p.label :addressLine1 %><br />
                <%= p.text_field :addressLine1 %>
            </div>

        #.... a few other fields removed to keep this short

        <br />
        <% end %>
        <%= f.submit %>
    <% end %>

Answer 1

fields_for将显示billing_addresses字段，这些字段是customer_profile的子项。如果这是一个新对象，您需要添加一个或多个，或者通过JavaScript添加适当的字段。您可能希望两者都添加，这样当它们到达那里时会有一个空字段，然后它们可以添加更多字段。

您可以创建一个@customer_profile.billing_addresses.build，使其在呈现表单时为空。

你知道如何通过javascript添加和删除字段吗？它在铁路广播中得到了很好的报道。