我已阅读这些文件:
我的来源:
应用程序/模型/ product.rb
class Product < ActiveRecord::Base
has_many :product_items, foreign_key: :product_id, :dependent => :destroy
accepts_nested_attributes_for :product_items
end
应用程序/模型/ product_item.rb
class ProductItem < ActiveRecord::Base
belongs_to :product
end
应用程序/控制器/ products_controller.rb
class ProductController < ApplicationController
def new
@product = Product.new
end
def create
@product = Product.new(product_params)
respond_to do |format|
if @product.save
format.html { redirect_to root_path }
else
format.html { render :new }
end
end
end
private
def product_params
params.require(:product).permit(:name, product_items_attributes: [ :description ])
end
end
应用程序/视图/产品/ _form.html.erb
<%= form_for(product, url: path) do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.fields_for :product_items do |item_form| %>
<%= item_form.label :description %>
<%= item_form.text_field :description %>
<% end %>
<%= f.submit 'Submit' %>
<% end %>
我可以将产品数据保存到数据库中,但不能保存product_items。
提交表单后添加我的帖子数据:
utf8:✓
authenticity_token:c5sdmoyLoN01Fxa55q6ahTQripx0GZvWU/d27C]asfdawofX9gw==
product[name]:apple
product[product_items][description]:good
commit:Submit
添加rails log:
Started POST "/products" for 10.0.2.2 at 2015-09-15 13:00:57 +0900
Processing by ProductController#create as HTML
I, [2015-09-15T13:00:58.039924 #28053] INFO -- : Parameters: {"utf8"=>"✓", "authenticity_token"=>"bilBzgOLc2/ZRUFhJORn+CJvCHkVJSsHQTg1V/roifoHxi9IRA==", "product"=>{"name"=>"apple", "product_items"=>{"description"=>"good"}}, "commit"=>"Submit"}
答案 0 :(得分:2)
您的new
方法应如下所示,以便保存product_items
def new
@product = Product.new
@product.product_items.build
end
您还应更改product_params
,如下所示 更新 ,以便在以后中正常使用。
def product_params
params.require(:product).permit(:name, product_items_attributes: [ :id, :description ])
end
答案 1 :(得分:0)
更新您的控制器操作product_params
def product_params
params.require(:product).permit(:name, product_items_attributes: [:id, :description, :_destroy ])
end
您可以使用nested_form
gem来为您提供完整的演示和功能控制。这是链接https://github.com/ryanb/nested_form