Ruby on Rails fields_for在编辑操作上生成太多字段

Question

我有一个真正的野兽形式,基本上是一个五页的销售形式,当创建一个新的形式一切都很好.但是当你去编辑新表格时,它会复制字段和值四次,有时甚至是7次.我不知道编辑操作是如何工作的,它使用与新操作使用的相同的部分形式.但这是我的控制器操作新的和编辑操作.

此外,复制不会发生在每个字段中,似乎只发生在存在has_many关系的部分.

  # GET /references/new
  # GET /references/new.json
  def new
    @reference = Reference.new
    @user_id = params[:user_id]
    @reference.build_customer_overview
    @reference.build_solution_description
    @reference.solution_description.deal_details.build
    component = @reference.components.build
    component.servers.build
    component.services.build
    partner = @reference.build_partner
    partner.competitors.build
    partner.contacts.build
    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @reference }
    end
  end

  # GET /references/1/edit
  def edit
    @reference = Reference.find(params[:id])
    @user_id = @reference.user_id
  end

我只是不知道它为什么会在编辑操作上生成额外的字段,希望有更多铁路经验的人知道这种行为.

谢谢!

编辑:

以下是每个红宝石块渲染4次的表单部分.

  <%= f.fields_for :deal_details do |ff| %>
    <div>
      <%= ff.label :title, 'Customer\'s business/IT needs (why was this solution required)' %>
      <%= ff.hidden_field :title, value: 'business/IT needs' %>
      <br />
      <%= ff.text_area :content %>
    </div>
  <% end %>

  <%= f.fields_for :deal_details do |ff| %>
    <div>
      <%= ff.label :title, 'Description of solution: (including product/services information)' %>
      <%= ff.hidden_field :title, value: 'Description of solution' %>
      <br />
      <%= ff.text_area :content %>
    </div>
  <% end %>

  <%= f.fields_for :deal_details do |ff| %>
    <div>
      <%= ff.label :title, 'Measurable anticipated benefits to the client and/or it\'s end customers: (i.e. this does NOT mean "benefits to")' %>
      <%= ff.hidden_field :title, value: 'Measurable benefits' %>
      <br />
      <%= ff.text_area :content %>
    </div>
  <% end %>

  <%= f.fields_for :deal_details do |ff| %>
    <div>
      <%= ff.label :title, 'Why won? (and why any competitors failed)' %>
      <%= ff.hidden_field :title, value: 'Why won?' %>
      <br />
      <%= ff.text_area :content %>
    </div>
  <% end %>

最终更新:

好的,所以我需要创建一个单独的表单进行编辑,使用一个通用块来循环数据库.这就是我对组件的要求

  <fieldset>
    <% title = f.object.component_title %>
    <h3><%= f.object.component_title %></h3>
    <%= f.fields_for :servers do |fff| %>
        <% if title == 'psg' %>
          <%= render 'psg_fields', f: fff %>
        <% end %>

        <% if title == 'servers' %>
          <%= render 'server_fields', f: fff %>
        <% end %>

        <% if title == 'storage' %>
          <%= render 'storage_fields', f: fff %>
        <% end %>

        <% if title == 'ipg' %>
          <%= render 'ipg_fields', f: fff %>
        <% end %>

        <% if title == 'software' %>
          <%= render 'software_fields', f: fff %>
        <% end %>

        <% if title == 'services' %>
          <%= render 'service_fields', f: fff %>
        <% end %>

        <% if title == 'financial' %>
          <%= render 'financial_fields', f: fff %>
        <% end %>
    <% end %>
    <%= link_to_add_fields "Add Server", f, :servers, :servers %>
  </fieldset>

Answer 1

在您创建父对象时Reference,您似乎在创建多个交易详细信息.默认情况下,当在一个has_many关系上使用fields_for帮助器时,它将为子节点的每个实例重复一次fields_for块(在本例中为"deal_detail").

要仅显示正确的实例,只需将您的实例添加到fields_for中,假设您已将deal_detail实例保存到 @my_deal_detail

<%= f.fields_for :deal_details, @my_deal_detail do |ff| %>

'has_many'下的fields_for文档中有更多信息