Question

我现在已经绞尽脑汁了一段时间，我无法弄清楚为什么我在我的rails应用程序中上传的csv失败了。我有一个简单的模型，它将csv中的两个名称转换为foreign_ids的整数。在控制台中手动执行时，该模型完全正常，但由于某种原因，它在服务器上失败。我收到错误消息：未定义的方法`id＆＃39;为零：NilClass

模型如下：

require 'csv'

class Schedule < ActiveRecord::Base
belongs_to :team
belongs_to :opponent, :foreign_key => 'opponent_id', :class_name => 'Team'   
def self.import(file)
   CSV.foreach(file.path, headers: true, :header_converters => :symbol) do |row|
    week_hash = row.to_hash 
    teamname = week_hash[:team] 
    teamhash = Team.where(:name => teamname).first 
    teamhash_id = teamhash.id 
    week_newhash = week_hash.reject!{ |k| k == :team} 
    week_newhash[:team_id] = teamhash_id

    opponentname = week_hash[:opponent] 
    opponent_hash = Team.where(:name => opponentname).first 
    hashopponent_id = opponent_hash.id 
    week_newhash = week_newhash.reject!{ |k| k == :opponent} 
    week_newhash[:opponent_id] = hashopponent_id


    Schedule.create!(week_newhash)
  end 
 end 
end

问题必定在某处。任何帮助将不胜感激。感谢。

Answer 1

我是个白痴。模型很好我只是在我的csv中贴了一个标签。

Answer 2

也许改变： teamhash_id = teamhash.id 至： teamhash_id = teamhash[:id]和hashopponent_id = opponent_hash.id到hashopponent_id = opponent_hash[:id]？

CSV导入中的模型错误 - Ruby on Rails

2 个答案: