[英]Rails accessing fields_for hidden_field id
我有一個嵌套的表單,其中包含一個父對象(full_application)和一個通過has_many關聯的子對象集合(fullapplication_districts)。 我試圖允許刪除表單上的各個子對象(通過javascript),但為此,我需要能夠獲取視圖中每個子對象的ID,以傳遞給控制器。 fields_for為ID創建了一個隱藏的輸入字段,但我似乎無法弄清楚如何從中獲取ID。 在下面的示例中,記錄是已渲染子對象列表中的第13個。
<input type="hidden" value="538" name="full_application[fullapplication_districts_attributes][12][id]" id="full_application_fullapplication_districts_attributes_12_id">
這是視圖中的表單設置:
<%= form_for(@full_application, url: full_applications_edit_path, method: :put) do |f| %>
<%= f.fields_for :fullapplication_districts do |fad| %>
<%= fad.collection_select :district_id, District.all, :id, :name, {include_blank: true}, {class: 'form-control'} %>
<%= fad.number_field :percent_one, class: 'form-control', step: :any %>
<%= fad.number_field :percent_two, class: 'form-control', step: :any %>
<%= fad.number_field :percent_three, class: 'form-control', step: :any %>
<%= link_to full_applications_districts_path(???), method: :delete, remote: true, data: { confirm: "Are you sure you want to delete this record?" } do %>
<i class="fa fa-trash"></i>
<% end %>
<% end %>
<% end %>
您可以使用: fad.object
或fad.object.id
。 這將返回到fullapplication_district實例。
<%= link_to full_applications_districts_path(fad.object), method: :delete, remote: true, data: { confirm: "Are you sure you want to delete this record?" } do %>
<i class="fa fa-trash"></i>
<% end %>
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