嗨，我正在玩耍，并且构建了一个小清单应用程序。
我的应用程序具有一个列表模型，该列表模型通过has拥有许多标签，并且属于许多连接表。
联接表称为listings_tags
我的问题是在创建或更新期间无法保存listing_tag关联。
我可以在控制台中看到
Started PATCH "/listings/92" for 127.0.0.1 at 2018-08-15 12:45:58 +1000
Processing by ListingsController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"5isdLs2FiToZxtm1ZVPP0y0lKtnfyoLA8Njv4GBwWVH1M3TIm2IUW9ts5RR06OpQz8tgSBitZ7Rm69uVIifevQ==", "listing"=>{"name"=>"Canteen Coffee", "streetAddres"=>"19 Park Avenue", "suburb_id"=>"31", "post_code_id"=>"2", "region_id"=>"1", "country_id"=>"2", "telephone"=>"+61416650204", "url"=>"http://canteencoffee.com.au/canteen-kitchen/", "tag_ids"=>["", "1"]}, "commit"=>"Update Listing", "id"=>"92"}
Listing Load (0.2ms) SELECT "listings".* FROM "listings" WHERE "listings"."id" = $1 LIMIT $2 [["id", 92], ["LIMIT", 1]]
Unpermitted parameter: :tag_ids
(1.8ms) BEGIN
Suburb Load (5.4ms) SELECT "suburbs".* FROM "suburbs" WHERE "suburbs"."id" = $1 LIMIT $2 [["id", 31], ["LIMIT", 1]]
(1.7ms) COMMIT
Redirected to http://localhost:3000/listings/92
Completed 302 Found in 21ms (ActiveRecord: 9.0ms)
显然我的问题是：tag_ids
所以我尝试更改我的列表params.require（：listing）.permit（），使其包含listing_attributes：[：id]，标签：[：id]和：tag_ids
它杀死了我:)请帮助
列表模型
class Listing < ApplicationRecord
has_and_belongs_to_many :tags
belongs_to :suburb
has_one :post_code, through: :suburb
accepts_nested_attributes_for :tags
def self.search(term)
if term
where('name LIKE ?', "%#{term}%")
else
order('id DESC')
end
end
end
标记模型
class Tag < ApplicationRecord
has_and_belongs_to_many :listings
end
列表标签架构
create_table "listings_tags", id: false, force: :cascade do |t|
t.bigint "listing_id", null: false
t.bigint "tag_id", null: false
t.index ["listing_id", "tag_id"], name: "index_listings_tags_on_listing_id_and_tag_id"
end
列表控制器
class ListingsController < ApplicationController
before_action :set_listing, only: [:show, :edit, :update, :destroy]
# GET /listings
# GET /listings.json
def index
@listings = Listing.search(params[:term])
end
# GET /listings/1
# GET /listings/1.json
def show
@listing = Listing.find(params[:id])
@tags = @listing.tags
@suburb = @listing.suburb
@postcode = @suburb.post_code
end
# GET /listings/new
def new
@listing = Listing.new
end
# GET /listings/1/edit
def edit
end
# POST /listings
# POST /listings.json
def create
@listing = Listing.new(listing_params)
respond_to do |format|
if @listing.save
format.html { redirect_to @listing, notice: 'Listing was successfully created.' }
format.json { render :show, status: :created, location: @listing }
else
format.html { render :new }
format.json { render json: @listing.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /listings/1
# PATCH/PUT /listings/1.json
def update
respond_to do |format|
if @listing.update(listing_params)
format.html { redirect_to @listing, notice: 'Listing was successfully updated.' }
format.json { render :show, status: :ok, location: @listing }
else
format.html { render :edit }
format.json { render json: @listing.errors, status: :unprocessable_entity }
end
end
end
# DELETE /listings/1
# DELETE /listings/1.json
def destroy
@listing.destroy
respond_to do |format|
format.html { redirect_to listings_url, notice: 'Listing was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_listing
@listing = Listing.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def listing_params
params.require(:listing).permit(:name, :streetAddress, :telephone, :url, :term, :suburb_id, :post_code_id, :region_id, :country_id, :tag_ids)
end
end
标签控制器
class TagsController < ApplicationController
before_action :set_tag, only: [:show, :edit, :update, :destroy]
# GET /tags
# GET /tags.json
def index
@tags = Tag.all
end
# GET /tags/1
# GET /tags/1.json
def show
@tag = Tag.find(params[:id])
@listings = @tag.listings
end
# GET /tags/new
def new
@tag = Tag.new
end
# GET /tags/1/edit
def edit
end
# POST /tags
# POST /tags.json
def create
@tag = Tag.new(tag_params)
respond_to do |format|
if @tag.save
format.html { redirect_to @tag, notice: 'Tag was successfully created.' }
format.json { render :show, status: :created, location: @tag }
else
format.html { render :new }
format.json { render json: @tag.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /tags/1
# PATCH/PUT /tags/1.json
def update
respond_to do |format|
if @tag.update(tag_params)
format.html { redirect_to @tag, notice: 'Tag was successfully updated.' }
format.json { render :show, status: :ok, location: @tag }
else
format.html { render :edit }
format.json { render json: @tag.errors, status: :unprocessable_entity }
end
end
end
# DELETE /tags/1
# DELETE /tags/1.json
def destroy
@tag.destroy
respond_to do |format|
format.html { redirect_to tags_url, notice: 'Tag was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_tag
@tag = Tag.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def tag_params
params.require(:tag).permit(:name)
end
end
表格
<%= bootstrap_form_for(@listing, local: true) do |form| %>
<%= form.text_field :name, id: :listing_name %>
<%= form.text_field :streetAddress, id: :listing_streetAddress %>
<%= form.collection_select(:suburb_id, Suburb.all, :id, :name) %>
<%= form.collection_select(:post_code_id, PostCode.all, :id, :number) %>
<%= form.collection_select(:region_id, Region.all, :id, :name) %>
<%= form.collection_select(:country_id, Country.all, :id, :name) %>
<%= form.text_field :telephone, id: :listing_telephone %>
<%= form.text_field :url, id: :listing_url %>
<%= form.select :tag_ids, Tag.all.pluck(:name, :id), {}, { multiple: true, class: "selectize" } %>
<%= form.submit %>
<% end %>
非常感谢您的帮助。我确信我做错了很简单。
答案 0 :(得分：1)
尝试
params.require(:listing).permit(:name, :streetAddress, :telephone, :url, :term, :suburb_id, :post_code_id, :region_id, :country_id, :tag_ids => [])