Ruby版本：
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
Rails版本：
Rails 4.1.4
我在两个模型之间有一个HABTM关联：Product和Page。当我使用带有以下命令的控制台时，此关联很有效：
Product.first.pages << Page.first
我在我的products / _form.html.haml中插入了check_box_tag以显示我的网页。 check_box效果很好，我可以选中/取消选中我的所有页面。
问题是当我尝试提交表单时，我在复选框中所做的修改不会保存。我在两个方面都有这个问题。
我认为问题是我的日志中的未许可参数错误。
Started PATCH "/admin/pages/linge-de-lit" for 127.0.0.1 at 2014-09-23 23:13:40 +0200
Processing by Admin::PagesController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"q/ZskL+Zijc8GMX9lF+EPgqc9uic9N9B/isWYHx7Cx0=", "page"=>{"category"=>"fabric", "title"=>"Linge de lit", "intro"=>"", "visibility"=>"1", "favorite"=>"0", "priority"=>"50", "product_ids"=>["", "1", "2"]}, "commit"=>"Save", "id"=>"linge-de-lit"}
Page Load (0.3ms) SELECT "pages".* FROM "pages" WHERE "pages"."slug" = 'linge-de-lit' ORDER BY "pages"."id" ASC LIMIT 1
Unpermitted parameters: product_ids
(0.3ms) begin transaction
Page Exists (0.3ms) SELECT 1 AS one FROM "pages" WHERE ("pages"."title" = 'Linge de lit' AND "pages"."id" != 5) LIMIT 1
(0.2ms) commit transaction
Redirected to http://localhost:3000/admin/pages/linge-de-lit
Completed 302 Found in 86ms (ActiveRecord: 1.1ms)
我认为问题是我强大的参数，但我不知道在哪里。
这是我的模特：
class Product < ActiveRecord::Base
has_and_belongs_to_many :pages
end
class Page < ActiveRecord::Base
has_and_belongs_to_many :products
has_many :posts
validates :category, presence: true
validates :title, presence: true, length: {maximum: 20}, uniqueness: true
extend FriendlyId
friendly_id :title, :use => [:slugged, :finders]
before_save :default_values
def default_values
self.title = self.title.capitalize
end
#Scopes
scope :visible, -> { where(visibility: true) }
scope :favorite, -> { where(favorite: true) }
end
这是我的控制器：
class Admin::ProductsController < ApplicationController
before_action :set_product, only: [:show, :edit, :update, :destroy]
# GET /admin/products
def index
@products = Product.all
end
# GET /admin/products/1
def show
end
# GET /admin/products/new
def new
@product = Product.new
@pages = Page.all
end
# GET /admin/products/1/edit
def edit
@pages = Page.all
end
# POST /admin/products
def create
@product = Product.new(product_params)
if @product.save
redirect_to [:admin, @product], notice: 'Product was successfully created.'
else
render action: 'new'
end
end
# PATCH/PUT /admin/products/1
def update
if @product.update(product_params)
redirect_to [:admin, @product], notice: 'Product was successfully updated.'
else
render action: 'edit'
end
end
# DELETE /admin/products/1
def destroy
@product.destroy
redirect_to admin_products_url, notice: 'Product was successfully destroyed.'
end
private
# Use callbacks to share common setup or constraints between actions.
def set_product
@product = Product.find(params[:id])
end
# Only allow a trusted parameter "white list" through.
def product_params
params.require(:product).permit(:name, :description, :brand_id, :price, :minimum_price, :shop_disponibility, :web_disponibility, :purchase_link, :favorite, {:pages_ids => []})
end
end
class Admin::PagesController < ApplicationController
before_action :set_page, only: [:show, :edit, :update, :destroy]
# GET /admin/pages
def index
@pages = Page.all
end
# GET /admin/pages/1
def show
end
# GET /admin/pages/new
def new
@page = Page.new
@products = Product.all
end
# GET /admin/pages/1/edit
def edit
@products = Product.all
end
# POST /admin/pages
def create
@page = Page.new(page_params)
if @page.save
redirect_to [:admin, @page], notice: 'Page was successfully created.'
else
render action: 'new'
end
end
# PATCH/PUT /admin/pages/1
def update
if @page.update(page_params)
redirect_to [:admin, @page], notice: 'Page was successfully updated.'
else
render action: 'edit'
end
end
# DELETE /admin/pages/1
def destroy
@page.destroy
redirect_to admin_pages_url, notice: 'Page was successfully destroyed.'
end
private
# Use callbacks to share common setup or constraints between actions.
def set_page
@page = Page.find(params[:id])
end
# Only allow a trusted parameter "white list" through.
def page_params
params.require(:page).permit(:category, :title, :intro, :visibility, :favorite, :priority, :products_ids => [])
end
end
以下是我的观点：
# products/_form
= form_for([:admin, @product]) do |f|
- if @product.errors.any?
#error_explanation
%h2= "#{pluralize(@product.errors.count, "error")} prohibited this product from being saved:"
%ul
- @product.errors.full_messages.each do |msg|
%li= msg
.field
= f.label :name
= f.text_field :name
.field
= f.label :description
= f.text_area :description
.field
= f.label :brand_id
= f.text_field :brand_id
.field
= f.label :price
= f.text_field :price
.field
= f.label :minimum_price
= f.check_box :minimum_price
.field
= f.label :shop_disponibility
= f.check_box :shop_disponibility
.field
= f.label :web_disponibility
= f.check_box :web_disponibility
.field
= f.label :purchase_link
= f.text_field :purchase_link
.field
= f.label :favorite
= f.check_box :favorite
= hidden_field_tag "product[page_ids][]", nil
- Page.all.each do |page|
= check_box_tag "product[page_ids][]", page.id, @product.page_ids.include?(page.id), id: dom_id(page)
= label_tag dom_id(page), page.title
.actions
= f.submit 'Save'
# pages/_form
= form_for([:admin, @page]) do |f|
- if @page.errors.any?
#error_explanation
%h2= "#{pluralize(@page.errors.count, "error")} prohibited this page from being saved:"
%ul
- @page.errors.full_messages.each do |msg|
%li= msg
.field
= f.label :category
= f.select :category, options_for_select(@pages_categories), {:prompt => "- Sélectionner une catégorie -"}
.field
= f.label :title
= f.text_field :title
.field
= f.label :intro
= f.text_area :intro
.field
= f.label :visibility
= f.check_box :visibility
.field
= f.label :favorite
= f.check_box :favorite
.field
= f.label :priority
= f.number_field :priority
= hidden_field_tag "page[product_ids][]", nil
- Product.all.each do |product|
= check_box_tag "page[product_ids][]", product.id, @page.product_ids.include?(product.id), id: dom_id(product)
= label_tag dom_id(product), product.name
.actions
= f.submit 'Save'
答案 0 :(得分：3)
那里有一个拼写错误:)而不是
# Only allow a trusted parameter "white list" through.
def page_params
params.require(:page).permit(:category, :title, :intro, :visibility, :favorite, :priority, :products_ids => [])
end
应该是product_ids：
# Only allow a trusted parameter "white list" through.
def page_params
params.require(:page).permit(:category, :title, :intro, :visibility, :favorite, :priority, :product_ids => [])
end