Question

我已经构建了一个导入数据的任务：

CSV.foreach(file, :headers => true) do |row|  
  question = Question.new ({  
  content:   row[0],
  mark:      row[1],
  topic_id:  row[2],
  question_type_id: row[3],
  answers_attributes: [
    { content: row[5], correct: row[6] },
    { content: row[7], correct: row[8] }
  ]
})
question.user_id = row[4]
question.save!

这是我的CSV文件：

content, mark, topic_id, question_type_id, user_id, content, correct, content, correct
_____ are people involved in or affected by project activities, 5, 16, 1, 3, True, 't', False, 'f'

但是当我运行导入任务时，correct attribute在数据库中始终为FALSE，我尝试使用不同的Boolean Data Type PostgreSQL但不能正常工作。我错了什么？

Answer 1

我发现了问题。这是csv文件有问题：

content, mark, topic_id, question_type_id, user_id, content, correct, content, correct
_____ are people involved in or affected by project activities, 5, 16, 1, 3, True, 1, False, 0

这里的问题是布尔列值之前的空格。在上面的csv文件中，True, 1之间的空格会产生问题。当csv文件导入到数据库时，它包含1前面的空格，因此值已导入：" 1"，而不是"1"，因此postgresql无法识别带空格的值。我删除了它之前的空间，它现在工作，这是我正确的csv文件（我删除了所有空格）：

content,mark,topic_id,question_type_id,user_id,content,correct,content,correct
_____ are people involved in or affected by project activities,5,16,1,3,True,1,False,0

如果在CSV文件中有像空格一样的问题，也许对SO有帮助。

Answer 2

尝试用true / false替换True / False

1.9.3-p194 :006 > True
NameError: uninitialized constant True
from (irb):6
from /Users/SAdvincula/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'
1.9.3-p194 :007 > true
=> true

Answer 3

更改您的csv文件

content, mark, topic_id, question_type_id, user_id, content, correct, content, correct
_____ are people involved in or affected by project activities, 5, 16, 1, 3, True, '1', False, '0'

将数据从csv导入postgresql时无法设置布尔值

3 个答案: