Python：如何解决问题：Django中的“格式错误的十六进制UUID字符串”

问题描述

我创建了 post模型，其中将 post_id作为主键字段。当我尝试创建帖子时，它会引发一个错误：格式错误的UUID字符串。我希望能帮助我解决这个问题。

I have created 'post' model in which I included 'post_id' as the primary key field. When I am trying to create a post, it is raising an error: 'badly formed hexadecimal UUID string'. I would appreciate helping me in solve this.

这是我的代码。

Models.py：

Models.py:

class Post(models.Model):

    post_id = models.UUIDField(primary_key=True, default='uuid.uuid4', editable=False)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
    from1 = models.CharField(max_length=20)
    To = models.CharField(max_length=20)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)

    objects = PostManager()

    def __unicode__(self):
        return self.post_id

    def __str__(self):
        return self.post_id

    def get_absolute_url(self):
        return reverse("posts:detail", kwargs={"post_id": self.post_id})

    class Meta:
        ordering = ["-timestamp", "-Time"]

views.py：

def post_create(request):

    form = PostForm(request.POST or None)
    if form.is_valid():
        instance = form.save(commit=False)
        print(form.cleaned_data.get("post_id"))
        instance.user = request.user
        instance.save()
        return HttpResponseRedirect(instance.get_absolute_url())
    context = {
        "form": form,
    }
    return render(request, "loggedin_load/post_load.html", context)

推荐答案

您需要导入模块，并且不要在'uuid.uuid4'周围使用引号。

You need to import the module and not use quotes around 'uuid.uuid4'.

应该有点像：

import uuid  # The uuid module
class Post(models.Model):

    post_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)  # using the function uuid4 on the module
    user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
    from1 = models.CharField(max_length=20)
    To = models.CharField(max_length=20)
    timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)

    objects = PostManager()

    def __unicode__(self):
        return self.post_id

    def __str__(self):
        return self.post_id

    def get_absolute_url(self):
        return reverse("posts:detail", kwargs={"post_id": self.post_id})

    class Meta:
        ordering = ["-timestamp", "-Time"]

NB我尚未测试以上代码，并且我同意一些您不需要UUID的注释用于post_id。不知道更多我无能为力。

N.B I've not tested the above code, and I agree with some of the comments you shouldn't need a UUID for the post_id. Without knowing more I couldn't help further.

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