Ruby on rails 外键的Rails CSV导入开关字符串

我已经为我的Ruby应用程序设置了CSV导入。一切都很好，但是当我尝试上传一个字符串，然后搜索一个id作为散列中的外键输入时，我遇到了问题。我的CSV模型如下所示：

class Player < ActiveRecord::Base 
  belongs_to :team 
  validates :team_id, presence: true
  def self.import(file)
    CSV.foreach(file.path, headers: true, :header_converters => :symbol) do |row|
      player_hash = row.to_hash 
      teamname = player_hash[:team] 
      teamhash = Team.where(:name => teamname).first 
      hashid = teamhash.id 
      player_newhash = player_hash.reject!{ |k| k == :team} 
      player_newhash[:team_id] = hashid 
    end 

    Player.create! (player_newhash)
  end 
end

classplayer：symbol）do |行|
player\u hash=row.to\u hash
teamname=player\u hash[：team]
teamhash=Team.where（：name=>teamname）。首先
hashid=teamhash.id
player\u newhash=player\u hash.reject！{| k | k==：团队}
player\u newhash[：team\u id]=hashid
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玩家，创造！（播放器_newhash）
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我相信这就是问题所在。当尝试执行时，我得到错误：

未定义的局部变量或方法“player\u newhash”#

---

非常感谢您的帮助。

player\u newhash是foreach循环中的一个局部变量，因此您的create也需要在其中：

class Player < ActiveRecord::Base 
  belongs_to :team 
  validates :team_id, presence: true

  def self.import(file)
    CSV.foreach(file.path, headers: true, :header_converters => :symbol) do |row|
      player_hash = row.to_hash 
      teamname = player_hash[:team] 
      teamhash = Team.where(:name => teamname).first 
      hashid = teamhash.id 
      player_newhash = player_hash.reject!{ |k| k == :team} 
      player_newhash[:team_id] = hashid 
      Player.create!(player_newhash)
    end 
  end 
end

classplayer：symbol）do |行|
player\u hash=row.to\u hash
teamname=player\u hash[：team]
teamhash=Team.where（：name=>teamname）。首先
hashid=teamhash.id
player\u newhash=player\u hash.reject！{| k | k==：团队}
player\u newhash[：team\u id]=hashid
玩家，创造！（播放器_newhash）
结束
结束
结束

顺便说一句，我通过重构一秒钟来找出发生了什么事，从而得到了答案。。。如果有帮助，我的版本如下：

class Player < ActiveRecord::Base
  belongs_to :team
  validates :team_id, presence: true

  def self.import(file)
    CSV.foreach(file.path, headers: true, :header_converters => :symbol) do |row|
      player_hash = row.to_hash
      player_newhash = player_hash.reject!{ |k| k == :team} 
      player_newhash[:team_id] = find_team(player_hash[:team]).id
      Player.create!(player_newhash)
    end
  end

  private

  def find_team(team_name)
    Team.where(name: team_name).first 
  end
end

classplayer：symbol）do |行|
player\u hash=row.to\u hash
player\u newhash=player\u hash.reject！{| k | k==：团队}
player\u newhash[：team\u id]=查找团队（player\u hash[：team]）.id
玩家，创造！（播放器_newhash）
结束
结束
私有的
def查找团队（团队名称）
团队。地点（名称：团队名称）。第一
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