我最近被告知,对于我目前的rails应用关系,我应该使用gem nested set。 (我以前的帖子/问题here)我目前有3个模型,
分类has_many子类别
子类别belongs_to类别和has_many产品。
产品belongs_to子类别。我想要显示类似这样的东西
+分类
----子目录
--------产品
--------产品
----子目录
--------产品
--------产品
+分类
----子目录
--------产品
--------产品
所以,如果我在nested_set中这样做,我将如何在我的模型中设置它?我会删除子类别和产品模型,只需在Category模型中添加acts_as_nested_set吗?一旦我对模型进行了处理,我将如何更新我的控制器操作,以便能够在我创建的嵌套集中创建节点?
我想只是帮助我理解如何进行CRUD,创建,读取,更新和销毁此嵌套列表。
这是我已经有的一些代码
分类控制器:
class CategoriesController < ApplicationController
def new
@category = Category.new
@count = Category.count
end
def create
@category = Category.new(params[:category])
if @category.save
redirect_to products_path, :notice => "Category created! Woo Hoo!"
else
render "new"
end
end
def edit
@category = Category.find(params[:id])
end
def destroy
@category = Category.find(params[:id])
@category.destroy
flash[:notice] = "Category has been obliterated!"
redirect_to products_path
end
def update
@category = Category.find(params[:id])
if @category.update_attributes(params[:category])
flash[:notice] = "Changed it for ya!"
redirect_to products_path
else
flash[:alert] = "Category has not been updated."
render :action => "edit"
end
end
def show
@category = Category.find(params[:id])
end
def index
@categories = Category.all
end
end
类别模型:
class Category < ActiveRecord::Base
acts_as_nested_set
has_many :subcategories
validates_uniqueness_of :position
scope :position, order("position asc")
end
子类别模型:
class Subcategory < ActiveRecord::Base
belongs_to :category
has_many :products
scope :position, order("position asc")
end
最后,产品型号:
class Product < ActiveRecord::Base
belongs_to :subcategory
has_many :products
scope :position, order("position asc")
end
非常感谢任何帮助。
答案 0 :(得分:2)
我会选择类别和类似产品:
class Product > ActiveRecord::Base
belongs_to :category
end
class Category > ActiveRecord::Base
has_many :products
acts_as_nested_set
end
class CategoryController < ApplicationController
def create
@category = params[:id] ? Category.find(params[:id]).children.new(params[:category]) : Category.new(params[:category])
if @category.save
redirect_to products_path, :notice => "Category created! Woo Hoo!"
else
render "new"
end
end
def new
@category = params[:id] ? Category.find(params[:id]).children.new : Category.new
end
def index
@categories = params[:id] ? Category.find(params[:id]).children : Category.all
end
end
#config/routes.rb your categories resource could be something like..
resources :categories do
resources :children, :controller => :categories,
:only => [:index, :new, :create]
end
这种方式最灵活,因为您可以将您的产品放在任何级别的任何类别中。