Question

我正在创建一个应用程序来存储玩FIFA游戏并与朋友建立私人排行榜。

我设法将用户添加到联盟（私人组），但现在我想让用户加入多个联赛并轻松切换。

我为游戏和用户添加了一个league_id。

加载排行榜时，我只显示与current_user.league_id匹配的用户，对于胜负，我只计算与该匹配的游戏current_user.league_id。

这非常有效，但是用户应该可以加入其他联盟，并在他们之间轻松切换。我正在考虑为用户创建另一个字段，用于存储所有已加入联盟的集合，并添加一个操作来更改active_league_id。

有人能指出我在正确的方向吗？

class User < ActiveRecord::Base

    devise :registerable, :confirmable
    devise :omniauthable, :omniauth_providers => [:facebook]

    #RELATIONS SINGLE GAMES

    has_many :home_games,    class_name: 'Game', foreign_key: 'home_team_user_id'
    has_many :away_games, class_name: 'Game', foreign_key: 'away_team_user_id'

    #RELATIONS MULTI GAMES

    has_many :first_home_games,    class_name: "Multiplayergame", foreign_key: "home_team_first_user_id"
    has_many :second_home_games,    class_name: "Multiplayergamer", foreign_key: "home_team_second_user_id"

    has_many :first_away_games, class_name: "Multiplayergame", foreign_key: "away_team_first_user_id"
    has_many :second_away_games, class_name: "Multiplayergame", foreign_key: "away_team_second_user_id"

    #RELATIES SCORE CLASSEREN SINGLE GAMES 

    has_many :wins, class_name: 'Game', foreign_key: 'winner_id'
    has_many :losses, class_name: 'Game', foreign_key: 'loser_id'

    has_many :bonusses, class_name: 'Game', foreign_key: 'bonus_id'
    has_many :loserbonusses, class_name: 'Game', foreign_key: 'bonus_loser_id'

    has_many :firstdraws, class_name: 'Game', foreign_key: 'first_draw_id'
    has_many :seconddraws, class_name: 'Game', foreign_key: 'second_draw_id'


    #RELATIES SCORE CLASSEREN MULTI GAMES 

    has_many :firstwins, class_name: 'Multiplayergame', foreign_key: 'winner_first_id'
    has_many :secondwins, class_name: 'Multiplayergame', foreign_key: 'winner_second_id'
    has_many :firstlosses, class_name: 'Multiplayergame', foreign_key: 'loser_first_id'
    has_many :secondlosses, class_name: 'Multiplayergame', foreign_key: 'loser_second_id'

    has_many :firstbonusses, class_name: 'Multiplayergame', foreign_key: 'bonus_first_id'
    has_many :secondbonusses, class_name: 'Multiplayergame', foreign_key: 'bonus_second_id'
    has_many :firstloserbonusses, class_name: 'Multiplayergame', foreign_key: 'bonus_first_loser_id'
    has_many :secondloserbonusses, class_name: 'Multiplayergame', foreign_key: 'bonus_second_loser_id'

    has_many :firstmultidraws, class_name: 'Multiplayergame', foreign_key: 'first_multidraw_id'
    has_many :secondmultidraws, class_name: 'Multiplayergame', foreign_key: 'second_multidraw_id'
    has_many :thirdmultidraws, class_name: 'Multiplayergame', foreign_key: 'third_multidraw_id'
    has_many :fourthmultidraws, class_name: 'Multiplayergame', foreign_key: 'fourth_multidraw_id'

    belongs_to :league

    has_one :league_admin, class_name: 'League', foreign_key: 'league_admin_id'

##############################################################################################

    ### TOTAL WINS CURRENT LEAGUE SINGLE PLAYER

    def current_league_wins
        wins.where(:league_id => self.league_id).count
    end

    #### TOTAL LOSSES CURRENT LEAGUE SINGLE PLAYER

    def current_league_losses
        losses.where(:league_id => self.league_id).count
    end

    #### TOTAL DRAWS CURRENT LEAGUE SINGLE PLAYER

    def draws
        firstdraws.where(:league_id => self.league_id).count + seconddraws.where(:league_id => self.league_id).count
    end

#####################################################################################################    
    #### TOTAL WINS CURRENT LEAGUE MULTIPLAYER

    def current_league_multi_wins
        firstwins.where(:league_id => self.league_id).count + secondwins.where(:league_id => self.league_id).count
    end


    #### TOTAL LOSSES CURRENT LEAGUE MULTIPLAYER

    def current_league_multi_losses
        firstlosses.where(:league_id => self.league_id).count + secondlosses.where(:league_id => self.league_id).count
    end

    #### TOTAL DRAWS CURRENT LEAGUE MULTIPLAYER

    def multidraws
    firstmultidraws.where(:league_id => self.league_id).count + secondmultidraws.where(:league_id => self.league_id).count + thirdmultidraws.where(:league_id => self.league_id).count + fourthmultidraws.where(:league_id => self.league_id).count

    end

控制器记分牌：

class ScoreboardController < ApplicationController
    before_action :authenticate_user!

    #LAAD ALLE USERS GERANSCHIKT VOLGENS SCORE

    def index
        @users = User.where(:league_id => current_user.league_id).sort_by(&:score).reverse



    end

end

我需要实现的是，用户可以轻松地在加入的联赛之间切换，如果用户更改联赛，他仍会出现在所有排行榜中。如果一个用户现在改变了联赛，他就不再进入那个排行榜，直到他重新加入，这是正常的，因为他的league_id发生了变化。

Answer 1

我认为您正在寻找的是User和League之间的has_and_belongs_to_many关系。

class User < ActiveRecord::Base
  has_and_belongs_to_many :leagues
end

class League < ActiveRecord::Base
  has_and_belongs_to_many :users
end

这将创建一个名为leagues_users的表，它将分别包含leagues和users表的外键。

您可以通过查看current_user.leagues轻松切换要查看的联赛。

修改

关于您的记分牌控制器，我说根据当前用户设置记分板更有意义（如果用户可以属于多个联赛）。

这样的事情：

class Scoreboard < ActiveRecord::Base has_one :league end def ScoreboardController < ApplicationController def show @scoreboard = Scoreboard.find(params[:id]) # and access the users like so: # @scoreboard.league.users end end

让用户加入多个联盟（组）并在他们之间切换

1 个答案: