嵌套表单不创建嵌套的记录。
您好我有2个型号Product和ProductSize。 我在Product表单中创建了ProductSize。
问题是，它不能持久创建ProductSizes。 您应该能够访问product.product_sizes并显示ProductSizes列表。
product.rb
class Product :destroy validates :title, presence: true, length: { maximum: 30 } validates :description, presence: true, length: { maximum: 2000 } validates :category, :user, :price, presence: true accepts_nested_attributes_for :product_images, :product_sizes, allow_destroy: true end
product_size.rb
class ProductSize < ActiveRecord::Base belongs_to :product belongs_to :size validates :quantity, presence: true end
这是我的表格。 它的工作方式是：用户可以上传图像，然后选择产品的类别。 让我们说他们选择衬衫，然后所有衬衫尺寸的列表将下降像XS，小，中，大。 然后，用户将他们拥有的数量放在他们拥有的尺寸上。 喜欢13件XS衫和4件大衬衫。
{ :product_image => "#product_images" } %>
<div class='sizes_container' id ='sizes_container_for_'>
以下是我的params在创建动作中的样子。
36: def create => 37: binding.pry 38: @product = Product.new product_params 39: @product.user_id = current_user.id 40: if @product.save 41: redirect_to @product 42: flash[:success] = "You have created a new product" 43: else 44: flash[:danger] = "Your product didn't save" 45: render "new" 46: end 47: end **[1] pry(#)> product_params** => {"title"=>"test", "price"=>"3325", "description"=>"test", "tag_list"=>"test", "category_id"=>"3", "size_description"=>"test", "shipping_description"=>"test", "product_images_attributes"=> {"0"=> {"product_image"=> #<ActionDispatch::Http::UploadedFile:0x007f8cb786a010 @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"product[product_images_attributes][0][product_image]\"; filename=\"780069_black_l.jpg\"\r\nContent-Type: image/jpeg\r\n", @original_filename="780069_black_l.jpg", @tempfile=#>, "_destroy"=>"false"}, "1450863732810"=> {"product_image"=> #<ActionDispatch::Http::UploadedFile:0x007f8cb7869e08 @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"product[product_images_attributes][1450863732810][product_image]\"; filename=\"20090a.jpg\"\r\nContent-Type: image/jpeg\r\n", @original_filename="20090a.jpg", @tempfile=#>, "_destroy"=>"false"}}} [2] pry(#)> params => {"utf8"=>"✓", "authenticity_token"=>"jfh6vsb1N1zhAIFyzer4liwuV+iHQ+P8pF6mZHUyF8IXNn6oXqnLDse84jnrP3BKI889CWigIDqVMJncxOYZ9Q==", "product"=> {"product_images_attributes"=> {"0"=> {"product_image"=> #<ActionDispatch::Http::UploadedFile:0x007f8cb786a010 @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"product[product_images_attributes][0][product_image]\"; filename=\"780069_black_l.jpg\"\r\nContent-Type: image/jpeg\r\n", @original_filename="780069_black_l.jpg", @tempfile=#>, "_destroy"=>"false"}, "1450863732810"=> {"product_image"=> #<ActionDispatch::Http::UploadedFile:0x007f8cb7869e08 @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"product[product_images_attributes][1450863732810][product_image]\"; filename=\"20090a.jpg\"\r\nContent-Type: image/jpeg\r\n", @original_filename="20090a.jpg", @tempfile=#>, "_destroy"=>"false"}}, "category_id"=>"3", "title"=>"test", "price"=>"3325", "description"=>"test", "size_description"=>"test", "shipping_description"=>"test", "tag_list"=>"test"}, "product_sizes_attributes"=>{"sizes_quantity"=>{"1"=>"3", "2"=>"4", "3"=>""}}, "commit"=>"Create new product", "controller"=>"products", "action"=>"create"} [3] pry(#)> params[:product_sizes_attributes] => {"sizes_quantity"=>{"1"=>"3", "2"=>"4", "3"=>""}}
看起来您的表单没有product_sizes的fields_for ：
<%= simple_nested_form_for @product do |f| %> <%= f.fields_for :product_sizes do |product_size| %> <%= product_size.text_field .... %> <% end %> <% end %>
必须使用适当的控制器代码备份：
#app/controllers/products_controller.rb class ProductsController < ApplicationController def new @product = Product.new @product.product_images.build @product.product_sizes.build end def create @product = Product.new product_params @product.save end private def product_params params.require(:product).permit(:x, :y, :z, product_images_attributes: [:image], product_sizes_attributes: [...]) end end
这应该让它适合你。
将fields_for用于project_size 。 从@categories获取@sizes总数，并使用您之前使用过的collection_select 。 您的project_size表单代码
<% @categories.each do |category| %> <% category.sizes.each do |size| %> <%= label_tag "Size"product_form[sizes_by_id][#{size.id}]", size.title %> <%= text_field_tag "product_sizes_attributes[sizes_quantity][#{size.id}]" %> <% end %>
<% end %>
将会
<% @sizes = Size.joins(:category).where('categories.id IN (?)', @categories.map(&:id)) %> <%= f.fields_for :product_sizes do |product_size| %> <%= label_tag "Size" %> <%= product_size.collection_select :size_id, @sizes, :id, :title, include_blank: true, prompt: "Select One Size" %> <%= product_size.text_field :quantity %> <% end %>
而product_params将是
params.require(:product).permit(:title, :price, :description, :tag_list,:category_id, :size_description, :shipping_description, product_images_attributes: [:id, product_image: [] ], product_sizes_attributes: [:id, :size_id, :quantity])
我希望这会有所帮助。