Question

我有嵌套的表单，试图为每个复选框插入Categorization模型。因此，我没有收到任何错误，但Categorization模型的某个属性未插入表中。这是哈希的样子，选中了3个复选框中的2个："categorizations_attributes"=>{"0"=>{"clothing_size_id"=>["1", "2", ""]}}}

插入内容如下所示：SQL (0.4ms) INSERT INTO "categorizations" ("created_at", "product_id", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["created_at", Mon, 23 Jun 2014 17:44:45 UTC +00:00], ["product_id", 15], ["updated_at", Mon, 23 Jun 2014 17:44:45 UTC +00:00]]

插件需要使用"clothing_size_id"来构建，我认为("created_at", "product_id", "updated_at", "clothing_size_id")

如何正确插入？

ClothingSize表单上的复选框显示Product模型中的服装尺寸。每个复选框都应在Categorization模型中生成一行，并且选中product_id并选中每个复选框的clothing_size_id。

模型

产品

has_many :categorizations, dependent: :destroy
has_many :clothing_sizes, through: :categorizations

accepts_nested_attributes_for :categorizations
accepts_nested_attributes_for :clothing_sizes

分类

belongs_to :product
belongs_to :clothing_size

accepts_nested_attributes_for :clothing_size

ClothingSize

has_many :categorizations
has_many :products, through: :categorizations

accepts_nested_attributes_for :categorizations
accepts_nested_attributes_for :products

产品控制器

def new
  @product = Product.new
  @product.categorizations.build
end

def product_params
  params.require(:product).permit(:title, :description, 
    :image_url, :image_url2, :price, :quantity, :color, 
    :clothing_sizes_attributes => [:sizes, :clothing_size_id],
    :categorizations_attributes => {:clothing_size_id => []})
end

_form for Products

<%= form_for(@product) do |f| %>
  <%= f.fields_for :categorizations do |cat| %>
    <div class="field">
      <%= cat.collection_check_boxes :clothing_size_id, ClothingSize.all, :id, :sizes, {prompt: "Size"}  %>
    </div>
  <% end %>
  <%= f.submit 'Save Product'%>
<% end %>

Answer 1

我认为你想要从分类中取出你的衣服尺寸ID。

<%= form_for(@product) do |f| %>
  <div class="field">
    <%= f.collection_check_boxes :clothing_size_ids, ClothingSize.all, :id, :sizes { prompt: "Size" } %>
  </div>
<% end %>

然后在你的控制器中：

def product_params
  params.require(:product).permit(:title, :description, 
         :image_url, :image_url2, :price, :quantity, :color, 
         { clothing_size_ids: [] })
end

最后，我认为你不需要接受产品模型中任何关联的嵌套属性。

class Product < ActiveRecord::Base
  has_many :categorizations, dependent: :destroy
  has_many :clothing_sizes, through: :categorizations

  # accepts_nested_attributes_for :categorizations
  # accepts_nested_attributes_for :clothing_sizes
end

端

尝试一下，让我知道它是否有效。

嵌套表单中的collection_check_boxes不会正确地插入到连接表中，包含多对多

1 个答案: