循环中的嵌套形式

Question

我有一个 Inquiry，它有很多 InquiryItem 模型，它有很多 InquiryItemPrice。

在我的显示视图中，我正在遍历我的 inquiry_items，对于其中的每一个，我都需要 inquiry_item_price.

的输入字段

这些是我的模型：

询价

class Inquiry < ActiveRecord::Base
  belongs_to :company
  has_many :inquiry_items

  accepts_nested_attributes_for :inquiry_items, allow_destroy: true, reject_if: lambda { |a| a[:item_id].blank? && a[:quantity].blank? }
end

查询项目

class InquiryItem < ActiveRecord::Base
  belongs_to :inquiry
  belongs_to :item
  has_many :inquiry_item_prices

  accepts_nested_attributes_for :inquiry_item_prices, allow_destroy: true, reject_if: lambda { |a| a[:item_id].blank? && a[:quantity].blank? }
end

InquiryItemPrices

class InquiryItemPrices < ActiveRecord::Base
  belongs_to :inquiry_items
end

InquiriesController

  def show
    @request = Inquiry.find(params[:id])
    @request.inquiry_items.each { |item| item.inquiry_item_prices.build}
  end

show.html.slim

    -@inquiry.inquiry_items.each do |inquiry_item|
      tr
        td =inquiry_item.item.name
        td =inquiry_item.quantity
        =f.fields_for :inquiry_item_prices do |builder|
          td =builder.text_field :price, class:"form-control", placeholder:"Preço"

使用此代码，我为 price 加载了一个输入，如下所示：

<input class="form-control" placeholder="Preço" type="text" name="inquiry[inquiry_item_prices][price]" id="inquiry_inquiry_item_prices_price">

问题是它不是一个列表，所以我只会得到最后一个字段值，它应该是这样的：

<input class="form-control" placeholder="Preço" type="text" name="inquiry[inquiry_item_prices][0][price]" id="inquiry_inquiry_item_prices_0_price">

如何正确加载 InquiryItemPrice 并生成那些输入字段？

Answer 1

解决方案只是更新我的 show.html.slim form 标记文件

=form_for(@inquiry, url: inquiry_add_prices_path(@inquiry)) do |f|
      table class="table table-striped"
        thead
          tr
            th Nome
            th Quantidade
            th Valor
        tbody
          =f.fields_for :inquiry_items do |item_form|
            tr
              td =item_form.object.item.name
              td =item_form.object.quantity
              =item_form.fields_for :inquiry_item_prices do |price_form|
                td =price_form.text_field :price, class:"form-control", placeholder:"Preço"

          =f.submit "Enviar preços", class: "btn btn-success"

这样就不需要循环 @inquiry.inquiry_items 因为它们是在控制器 show 方法中构建的。

循环中的嵌套形式

Nested form in a loop

nested-forms

ruby-on-rails-4