传输数据到连接表：Rails 4(Transfer data to join table: Rails 4)

 我有一个滑轨模型Game和另一个模型Player 。 目前，分配给游戏的玩家的数据被存储在games桌中的（玩家ID）数组中。 
 
 我试图创建一个连接表来连接游戏，并且我创建了一个games_players连接表games_players ，然后我尝试运行迁移以在传输另一个迁移之前传输数据，以从games表中删除players数组。 
 
 我的代码传输数据如下： 
 
games = Game.all
games.each do |g|
  game = g
  games.players.each do |p|
    game.players << p
  end
end
 
 但它并不在联接表中保存数据，而是在games表中删除数组列。 在删除属性之前，如何将所有这些数据传输到新的连接表中？ 
 
 补充说明： 
 
class GamesPlayers < ActiveRecord::Base
  belongs_to :game, inverse_of: :games_players
  belongs_to :player, inverse_of: :games_players
end

class Game < ActiveRecord::Base
  has_many :games_players, inverse_of: :game
  has_many :players, through: :game_players
end

class Player < ActiveRecord::Base
  has_many :games_players, inverse_of: :player
  has_many :games, through: :games_players
end

I have a rails model Game and another model Player. Currently, the data for players assigned to a game was being stored in an array (of player ids) in the games table.
 
I'm trying to create a join table to connect games and I created a HABTM join table games_players and then I'm trying to run a migration to do transfer the data before running another migration to delete the players array from the games table.
 
My code to transfer the data is as follows:
 
games = Game.all
games.each do |g|
  game = g
  games.players.each do |p|
    game.players << p
  end
end
 
But it doesn't save the data at all in the join table rather it goes ahead with deleting the array column in the games table. How can I transfer all this data to the new join table before deleting the attribute?
 
Added associations for clarification:
 
class GamesPlayers < ActiveRecord::Base
  belongs_to :game, inverse_of: :games_players
  belongs_to :player, inverse_of: :games_players
end

class Game < ActiveRecord::Base
  has_many :games_players, inverse_of: :game
  has_many :players, through: :game_players
end

class Player < ActiveRecord::Base
  has_many :games_players, inverse_of: :player
  has_many :games, through: :games_players
end

原文：https://stackoverflow.com/questions/49287286