Question

class MyArticle(models.Model):
    id = models.CharField(max_length=150, primary_key=True)

    def __unicode__(self):
        return self.id

class UserProfile(models.Model):
    username = models.CharField(max_length=765)
    clicks = models.ManyToManyField(MyArticle, through='ClickEvent')

    def __unicode__(self):
        return self.username

class ClickEvent(models.Model):
    article = models.ForeignKey(MyArticle)
    user = models.ForeignKey(UserProfile)
    timestamp = models.DateTimeField()



art = MyArticle.objects.create(id = article_id)
eusr = UserProfile.objects.create(username = username)
cl = ClickEvent(article = art, user = eusr, timestamp = datetime.now())
cl.save()

这些对象都已创建，但是当我尝试保存单击时它失败了，我无法理解为什么？

cl.save（）＃失败

我按照这里描述的步骤，但似乎无法看到缺少的内容。 http://docs.djangoproject.com/en/dev/topics/db/models/#many-to-many-relationships

Answer 1

您是否曾尝试首先保存艺术品和eusr项目 - 例如：

art.save()
eusr.save()

在调用cl.save（）之前

无法将django对象保存到mysql（ManyToManyField）

1 个答案: