您好我正在创建一个在线零售店。
我有Category模型和Sizes模型。它们嵌套在一个表单中。当我创建类别I时，也会为该类别创建大小。
现在我可以创建一个类别和尺寸。但是，我无法以嵌套形式更新尺寸。
因此，单击编辑类别并更改一个大小的名称，然后单击更新。我得到以下错误。在屏幕上它只是说＆＃34;已经被拍摄＆＃34;。
如何通过此嵌套表单更新尺寸？ /Users/Documents/Safsy/Website/Safsy/Safsy/app/controllers/categories_controller.rb @ line 40 CategoriesController＃update：
39: def update
=> 40: binding.pry
41: if @category.update(category_params)
42: redirect_to @category
43: flash[:success] = 'Category was successfully updated.'
44: else
45: render "edit"
46: end
47: end
[1] pry(#<CategoriesController>)>
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameters: _destroy, id
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
Unpermitted parameter: _destroy
(0.1ms) begin transaction
Category Load (0.1ms) SELECT "categories".* FROM "categories" WHERE "categories"."id" = ? LIMIT 1 [["id", 64]]
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XSmall' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Small' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Medium' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Large' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XL' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XXL' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XXXL' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XSmall' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Small' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Medium' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'Large' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XL' LIMIT 1
CACHE (0.0ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XXL' LIMIT 1
Size Exists (0.1ms) SELECT 1 AS one FROM "sizes" WHERE "sizes"."title" = 'XXXL test' LIMIT 1
Category Exists (0.1ms) SELECT 1 AS one FROM "categories" WHERE ("categories"."name" = 'Shorts' AND "categories"."id" != 68) LIMIT 1
(0.1ms) rollback transaction
类别模型：
class Category < ActiveRecord::Base
has_ancestry
has_many :products
has_many :sizes
validates :name, presence: true, length: { maximum: 20 }, uniqueness: true
accepts_nested_attributes_for :sizes, allow_destroy: true
end
尺寸模型：
class Size < ActiveRecord::Base
validates :title, presence: true, length: { maximum: 15 }
validates :title, uniqueness: true
belongs_to :category
end
类别控制器：
class CategoriesController < ApplicationController
before_action :set_category, only: [:show, :edit, :update]
before_action :admin_user, only: [:destroy, :index, :edit, :show]
def index
@categories = Category.all
end
def show
@tags = Product.where(category_id: @category.id).tag_counts_on(:tags)
if params[:tag]
@products = Product.tagged_with(params[:tag])
else
@products = Product.where(category_id: @category.id).order("created_at DESC")
end
end
def new
@category = Category.new
3.times do
@category.sizes.build
end
end
def edit
end
def create
@category = Category.new(category_params)
if @category.save
redirect_to @category
flash[:success] = "You have created a new category"
else
flash[:danger] = "Your category didn't save"
render "new"
end
end
def update
binding.pry
if @category.update(category_params)
redirect_to @category
flash[:success] = 'Category was successfully updated.'
else
render "edit"
end
end
def destroy
category = Category.find(params[:id])
category.sizes.destroy_all
category.destroy
flash[:success] = "Category deleted"
redirect_to categories_path
end
private
def set_category
@category = Category.find(params[:id])
end
def category_params
params.require(:category).permit(:name, :parent_id, size_ids: [], sizes_attributes: [:title])
end
end
尺寸控制器：
class SizesController < ApplicationController
before_action :logged_in_user, only: [:create, :index, :destroy, :update]
before_action :admin_user, only: [:create, :index, :destroy, :update]
def create
@size = Size.create(size_params)
end
def index
@sizes = Size.all
end
def destroy
Size.find(params[:id]).destroy
end
def update
@size.update_attributes(size_params)
end
private
def size_params
params.require(:size).permit(:title, :category_id)
end
end
以下是分类更新方法中的参数：
39: def update
=> 40: binding.pry
41: if @category.update(category_params)
42: redirect_to @category
43: flash[:success] = 'Category was successfully updated.'
44: else
45: render "edit"
46: end
47: end
[1] pry(#<CategoriesController>)> params
=> {"utf8"=>"✓",
"_method"=>"patch",
"authenticity_token"=>"ZHuWURBwIctFJLgZ1HGNeKvGpK8LlgH9S6Mrh7No/CFdjtwNFoNtfi9NIVHBVhApYH/U5tuOzV0eqhSq/95SCw==",
"category"=>
{"name"=>"Shorts",
"parent_id"=>"64",
"sizes_attributes"=>
{"0"=>{"title"=>"XSmall", "_destroy"=>"false", "id"=>"21"},
"1"=>{"title"=>"Small", "_destroy"=>"false", "id"=>"22"},
"2"=>{"title"=>"Medium", "_destroy"=>"false", "id"=>"23"},
"3"=>{"title"=>"Large", "_destroy"=>"false", "id"=>"24"},
"4"=>{"title"=>"XL", "_destroy"=>"false", "id"=>"25"},
"5"=>{"title"=>"XXL", "_destroy"=>"false", "id"=>"26"},
"6"=>{"title"=>"XXXL test", "_destroy"=>"false", "id"=>"27"}}},
"commit"=>"Update Category",
"controller"=>"categories",
"action"=>"update",
"id"=>"68"}
答案 0 :(得分：2)
允许嵌套表单的_destroy和id如下： -
def category_params
params.require(:category).permit(:name, :parent_id, size_ids: [], sizes_attributes: [:id, :title, :_destroy])
end