XYZ 是此函数的无效关键字参数

Question

我已经定义并创建了以下模型：

class Links(models.Model):

    id = models.AutoField(primary_key=True, unique=True),

    longlink = models.CharField(max_length=100),

    shortlink = models.CharField(max_length=15),

    createdate = models.DateField(default=timezone.now)

    def __str__(self):

        return self.longlink

我的代码：

from appointments.models import Links

def shortlinkgen():

    import secrets

    return secrets.token_urlsafe(4) 

def DateToday():

    from datetime import datetime, date, time

    now = datetime.now()

    return now.strftime("%Y-%m-%d")

link = Links(longlink='https://mail.google.com/mail/u/0/#inbox/FMfcgxvzKQmmrZMGFJVWvsLlFPxQKhJG', shortlink=shortlinkgen(), createdate=DateToday())

link.save()

print(link)

我收到错误：

TypeError                                 Traceback (most recent call last)

<ipython-input-2-66d347994058> in <module>()

    9     return now.strftime("%Y-%m-%d")

    10 

---> 11 link = Links(longlink='https://mail.google.com/mail/u/0/#inbox/FMfcgxvzKQmmrZMGFJVWvsLlFPxQKhJG', shortlink=shortlinkgen(), createdate=DateToday())

    12 link.save()

    13 print(link)

~/.local/lib/python3.6/site-packages/django/db/models/base.py in __init__(self, *args, **kwargs)

    482                     pass

    483             for kwarg in kwargs:

--> 484                 raise TypeError("'%s' is an invalid keyword argument for this function" % kwarg)

    485         super().__init__()

    486         post_init.send(sender=cls, instance=self)

TypeError: 'longlink' is an invalid keyword argument for this function

怎么了？

Answer 1

class Links(models.Model):&nbsp; &nbsp; id = models.AutoField(primary_key=True, unique=True),&nbsp; &nbsp; longlink = models.CharField(max_length=100),&nbsp; &nbsp; shortlink = models.CharField(max_length=15),&nbsp; &nbsp; createdate = models.DateField(default=timezone.now)&nbsp; &nbsp; def __str__(self):&nbsp; &nbsp; &nbsp; &nbsp; return self.longlink问题在于每行末尾的“，”。您将字段定义为它们的类引用，而不是这些类的实例。它应该是class Links(models.Model):&nbsp; &nbsp; id = models.AutoField(primary_key=True, unique=True)&nbsp; &nbsp; longlink = models.CharField(max_length=100,default="") #or null=True incase!&nbsp; &nbsp; shortlink = models.CharField(max_length=15,default="")&nbsp; &nbsp; createdate = models.DateField(default=timezone.now)结果如下：