无法在Rails中存储模型的嵌套属性值(Rails配方36) [英] Failing to store nested attributes values for models in rails (rails recipes 36)
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问题描述
我正在尝试存储我添加的每个级别的值，当我使用添加/删除按钮时，可见字段的数量将按照其应有的方式进行更新，但是当我按下提交"时，只会存储游戏名称.分数以某种方式被丢弃.
I am trying to store the value for each level i add, the number of fields visible gets updated as they should when i use add/remove buttons, but when i press submit only the game name gets stored. The scores are discarded somehow.
<h1>Editing game</h1>
<% flash.each do |name, msg| -%>
<%= content_tag :div, msg, class: name %>
<% end -%>
<!--START-->
<%= form_for @game do |f| %>
<%= f.label :name %> <%= f.text_field :name %>
<h3>Scores:</h3>
<%= f.fields_for(:levels) do |level_form| %>
<!--<%= level_form.label :score %>-->
<%= level_form.text_field :score %>
</br>
<% end %>
<%= f.submit %>
<% end %>
<!--END-->
<%= button_to "Add Level",
:action => 'add_level',
:id =>@game
%>
<%= button_to "Remove Level",
:action => 'remove_level',
:id =>@game
%>
<%= link_to 'Show', @game %> |
<%= link_to 'Back', games_path %>
我的游戏模型:
class Game < ActiveRecord::Base
belongs_to :user
has_many :levels
accepts_nested_attributes_for :levels
end
我的关卡模型:
class Level < ActiveRecord::Base
belongs_to :game
end
我的游戏控制器:
class GamesController < ApplicationController
before_action :set_game,:initialize, only: [:show, :edit, :update, :destroy]
attr_reader :levels
def initialize
if @game
@levels = [] unless @levels
get_levels
end
end
def add_level
set_game
@level = @game.levels.create(:game_id=>params[:id])
@level.save
flash[:notice]="Level added"
redirect_to edit_game_path(params[:id])
end
def remove_level
set_game
unless @game.levels.length < 2
get_levels
@level=@levels.pop
@level.destroy
flash[:notice]="Removed Level"
else
flash[:notice]="Cannot remove last Level"
end
redirect_to edit_game_path(params[:id])
end
def save_scores
#Save all scores from fields in editview
redirect_to edit_game_path(params[:id])
end
# GET /games
# GET /games.json
def index
@games = Game.where(:user_id=> current_user.id)
end
# GET /games/1
# GET /games/1.json
def show
get_levels
respond_to do |format|
format.html { redirect_to games_url(params[:id]) }
format.json { render json: @levels}
end
end
# GET /games/new
def new
@game = Game.new
@game.user_id = current_user.id
@game.save
@level = @game.levels.create(:game_id=>@game)
@level.save
end
# GET /games/1/edit
def edit
end
# POST /games
# POST /games.json
def create
@game = Game.new(game_params)
respond_to do |format|
if @game.save
format.html { redirect_to @game, notice: 'Game was successfully created.' }
format.json { render action: 'show', status: :created, location: @game }
else
format.html { render action: 'new' }
format.json { render json: @game.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /games/1
# PATCH/PUT /games/1.json
def update
respond_to do |format|
if @game.update(game_params)
format.html { redirect_to @game, notice: 'Game was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @game.errors, status: :unprocessable_entity }
end
end
end
# DELETE /games/1
# DELETE /games/1.json
def destroy
@game.destroy
respond_to do |format|
format.html { redirect_to games_url }
format.json { head :no_content }
end
end
private
#levels for game
def get_levels
@levels = Level.where(:game_id=>@game)
end
# Use callbacks to share common setup or constraints between actions.
def set_game
@game = Game.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def game_params
params.require(:game).permit(:List)
end
end
Development.log:
Development.log:
Started POST "/games/add_level?id=18" for 127.0.0.1 at 2013-08-12 14:06:02 +0200
Processing by GamesController#add_level as HTML
Parameters: {"authenticity_token"=>"tlSgBCHlMjEbSeM8NDRDkkR/cme8yHhvfb3///rzYos=", "id"=>"18"}
Game Load (0.1ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "18"]]
(0.1ms) begin transaction
SQL (0.6ms) INSERT INTO "levels" ("created_at", "game_id", "updated_at") VALUES (?, ?, ?) [["created_at", Mon, 12 Aug 2013 12:06:02 UTC +00:00], ["game_id", 18], ["updated_at", Mon, 12 Aug 2013 12:06:02 UTC +00:00]]
(2.6ms) commit transaction
(0.1ms) begin transaction
(0.0ms) commit transaction
Redirected to http://127.0.0.1:3000/games/18/edit
Completed 302 Found in 8ms (ActiveRecord: 3.6ms)
Started GET "/games/18/edit" for 127.0.0.1 at 2013-08-12 14:06:02 +0200
Processing by GamesController#edit as HTML
Parameters: {"id"=>"18"}
Game Load (0.2ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "18"]]
Level Load (0.2ms) SELECT "levels".* FROM "levels" WHERE "levels"."game_id" = ? [["game_id", 18]]
Rendered games/edit.html.erb (11.2ms)
Completed 200 OK in 16ms (Views: 12.7ms | ActiveRecord: 0.8ms)
Started PATCH "/games/18" for 127.0.0.1 at 2013-08-12 14:06:07 +0200
Processing by GamesController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"tlSgBCHlMjEbSeM8NDRDkkR/cme8yHhvfb3///rzYos=", "game"=>{"name"=>"ll", "levels_attributes"=>{"0"=>{"score"=>"10", "id"=>"95"}, "1"=>{"score"=>"20", "id"=>"96"}, "2"=>{"score"=>"30", "id"=>"97"}}}, "commit"=>"Update Game", "id"=>"18"}
Game Load (0.1ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "18"]]
Unpermitted parameters: name, levels_attributes
(0.1ms) begin transaction
(0.1ms) commit transaction
Redirected to http://127.0.0.1:3000/games/18
Completed 302 Found in 4ms (ActiveRecord: 0.5ms)
Started GET "/games/18" for 127.0.0.1 at 2013-08-12 14:06:07 +0200
Processing by GamesController#show as HTML
Parameters: {"id"=>"18"}
Game Load (0.2ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "18"]]
Redirected to http://127.0.0.1:3000/games.18
Completed 302 Found in 3ms (ActiveRecord: 0.4ms)
Started GET "/games.18" for 127.0.0.1 at 2013-08-12 14:06:07 +0200
Processing by GamesController#index as
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1
Game Load (0.2ms) SELECT "games".* FROM "games" WHERE "games"."user_id" = 1
DEPRECATION WARNING: :confirm option is deprecated and will be removed from Rails 4.1. Use 'data: { confirm: 'Text' }' instead. (called from block in _app_views_games_index_html_erb__4567347473113639552_70262937037440 at /Users/david/Repositories/domain_devise/devise_example-master/app/views/games/index.html.erb:27)
Rendered games/index.html.erb (2.1ms)
Completed 200 OK in 9ms (Views: 5.8ms | ActiveRecord: 0.7ms)
[2013-08-12 14:06:07] WARN Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
Started GET "/games/18/edit" for 127.0.0.1 at 2013-08-12 14:06:15 +0200
Processing by GamesController#edit as HTML
Parameters: {"id"=>"18"}
Game Load (0.1ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "18"]]
Level Load (0.1ms) SELECT "levels".* FROM "levels" WHERE "levels"."game_id" = ? [["game_id", 18]]
Rendered games/edit.html.erb (6.5ms)
Completed 200 OK in 10ms (Views: 7.3ms | ActiveRecord: 0.5ms)
更改为允许:name和:levels_attributes后，我仍然得到:
After changing to permit :name and :levels_attributes I still get:
Started PATCH "/games/21" for 127.0.0.1 at 2013-08-12 14:36:07 +0200
Processing by GamesController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"tlSgBCHlMjEbSeM8NDRDkkR/cme8yHhvfb3///rzYos=", "game"=>{"name"=>"30", "levels_attributes"=>{"0"=>{"score"=>"40", "id"=>"100"}}}, "commit"=>"Update Game", "id"=>"21"}
Game Load (0.2ms) SELECT "games".* FROM "games" WHERE "games"."id" = ? LIMIT 1 [["id", "21"]]
Unpermitted parameters: levels_attributes
(0.1ms) begin transaction
(0.1ms) commit transaction
Redirected to http://127.0.0.1:3000/games/21
Completed 302 Found in 27ms (ActiveRecord: 1.8ms)
推荐答案
请将game_params方法更改为以下方法.
Please change the game_params method to below.
我不确定您允许的:List参数.
I'm not sure of the :List parameters you are allowing.
def game_params
params.require(:game).permit(:name, levels_attributes: [:score, :id])
end
我希望这会有所帮助.
这篇关于无法在Rails中存储模型的嵌套属性值(Rails配方36)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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