Django DateTimeField TypeError：预期的字符串或类似字节的对象 [英] Django DateTimeField TypeError: expected string or bytes-like object
问题描述
I know there are many posts about this error. Such as: this and this one
但是我已经知道了。这就是为什么我变得疯狂。
But I knew already that. And that's why I'm getting crazy.
当我创建实例并尝试保存它时，我没有遇到问题：
When I create an instance and try to save it, I don't have problems:
per_detail.preview_title = per_detail.details_sample.preview_title
per_detail.icon = per_detail.details_sample.icon
per_detail.content = fill_content(per_detail)
per_detail.save()
简单。
但是当已经实例，然后尝试再次保存（更新）。然后我得到这个错误：
But when there's already the instance, and I try to save it again (updated it). Then I get this error:
match = datetime_re.match(value)
TypeError：预期的字符串或类似字节的对象
TypeError: expected string or bytes-like object
输入以下代码：
personal_detail_sample = kwargs['instance']
personal_details = PersonalDetail.objects.filter(Q(details_sample=personal_detail_sample))
for per_detail in personal_details:
per_detail_updated = fill_updated_content(personal_detail_sample, per_detail)
per_detail_updated.save()
我得说，在哪里更新该实例都没关系，我总是得到相同的错误。 （所以，这不是因为 kwargs ['instance'] ）
I gotta say, it doesn't matter where I try to update that instance, I get always the same error. (so, it's not because the kwargs['instance'])
这是该字段，麻烦：
sent_date = models.DateTimeField（_（'sent_date'），null = True，blank = True）
您可能会注意到，我从未填写过 sent_date字段，但该字段应为null。因此，这应该不是问题。为了安全起见，我还尝试这样做：
As you maybe noticed, I never filled the field "sent_date", but it should be null. So it shouldn't be a problem. And for just being safe, I also tried to do:
per_detail.sent_date = *a date*
per_detail.save()
我遇到了同样的错误。
And I'm getting the same error.
我不知道会是什么。
也许有人可以帮助我。
Maybe someone can help me.
推荐答案
我在日期字段而不是发送日期中出现错误。
I got an error in the field "date" not "sent_date".
非常抱歉。 models.py 中的日期字段为：
I'm pretty sorry. The field of "date" in the models.py was:
date = models.DateTimeField（_（'日期），auto_now_add = True），但在数据库中是没有时区的时间而不是没有时区的时间戳。为什么？谁知道...
date = models.DateTimeField(_('date'), auto_now_add=True) but in the DataBase was time without time zone and not timestamp without time zone. Why? Who knows...
我删除了 sent_date 字段，发现日期还有另一个错误，这就是为什么我发现错误。
I deleted the sent_date field, and saw, that there was another error with a date, and that's why I found the error.
非常感谢尝试提供帮助的人！
Many thanks to the people that tried to help!
这篇关于Django DateTimeField TypeError：预期的字符串或类似字节的对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
