Question

嗨，我有一个团队表，然后是一个夹具模型：

 class Fixture < ActiveRecord::Base
attr_accessible :away_score, :away_team_id, :home_score, :home_team_id, :result, :week
 belongs_to :home_team, :class_name => 'Team'
 belongs_to :away_team, :class_name => 'Team'
end

然后我有一个基于他们的团队ID生成灯具的程序，但我不确定在我的rails应用程序中添加它的位置，我试图在我已经创建的20个团队的视图中显示灯具但不确定怎么样？所以我的输出将是主队team_name，id为1，远离队team_name，id为2，夹具1等......

teams = Array(1..20)
fixed_team = teams.shift   #The fixed competitor described in the algorithm
teams.length.times do |i|

   #Create the two groups listed in the algorithm
   teams = teams.rotate
   week_teams = teams.dup.unshift(fixed_team) 
   first_group, second_group = week_teams.each_slice(week_teams.length/2).to_a
   second_group.reverse!
   weeks_pairings = first_group.zip(second_group)

   #Output the week's pairings
   puts "Week #{i + 1}: #{weeks_pairings}"
end 

#Output:
#=> Week 1: [[1, 2], [3, 20], [4, 19], [5, 18], [6, 17], [7, 16], [8, 15], [9, 14],             [10, 13], [11, 12]]
#=> Week 2: [[1, 3], [4, 2], [5, 20], [6, 19], [7, 18], [8, 17], [9, 16], [10, 15],   [11, 14], [12, 13]]
#=> etc

Answer 1

假设您的数据库（或更多）中有20个团队条目（具有属性name）：

teams = Team.first(20)
fixed_team = teams.shift   #The fixed competitor described in the algorithm
teams.length.times do |i|

   #Create the two groups listed in the algorithm
   teams = teams.rotate
   week_teams = teams.dup.unshift(fixed_team) 
   first_group, second_group = week_teams.each_slice(week_teams.length/2).to_a
   second_group.reverse!
   weeks_pairings = first_group.zip(second_group)

   puts "Week #{i+1}: "
   weeks_pairings.each do |pair_of_teams|
     puts "#{pair_of_teams[0].name} vs. #{pair_of_teams[1].name}"
   end
end

Answer 2

您应该将算法的逻辑放在Fixture模型中;用静态方法模块化它，如

def self.show_fixtures
   #add algo here
end

但是您必须修改代码以返回数组或其他一些数据结构。现在你可以做到

Fixture.show_fixtures

无论在何处 - 在任何视图中，在控制器等中获得对战。

您还可以定义用于显示灯具的专用视图。首先，在FixtureController中添加一个动作

def show_fixtures
  @list = Fixture.show_fixtures
end

然后，添加视图/views/fixture/show_fixtures.html.your_extension 在视图中，您可以迭代@list数组并为灯具中的每个匹配渲染部分。

Answer 3

我没有得到你的代码所做的，但正如你在评论中所说，我建议你这样做。

在灯具中添加此方法。调用 Fixture.create_fixture

def self.create_fixture
  weeks_pairings = []
  teams = Team.all.map(&:name)
  fixed_team = teams.shift   #The fixed competitor described in the algorithm
  teams.length.times do |i|
    #Create the two groups listed in the algorithm
    teams = teams.rotate
    week_teams = teams.dup.unshift(fixed_team) 
    first_group, second_group = week_teams.each_slice(week_teams.length/2).to_a
    second_group.reverse!
    weeks_pairings << first_group.zip(second_group)
  end
    weeks_pairings #You can use this in view
end

在视图中：

 <% Fixture.create_fixture.each_with_index do |week, games_list| %>
   <%= "<h3> Week #{week+1} </h3>" %>
   <ul>
     <% games_list.each do |teams| %>
       <li><b><%= "#{teams.first} Vs #{teams.last}" %></li>
     <% end %>
   </ul>
  <% end %>

使用id从表中检索值

3 个答案: