Django 提示：AttributeError : ‘module‘ object has no attribute ‘utcnow‘

Posted 2021-09-05 在奋斗的大道

问题描述：今天使用Django+pyjwt 实现前后端分离基于token 凭证方式，我在实体对象（User）定义生成token 相关方法，核心代码如下：

models.py

from django.conf import settings
from django.db import models
import jwt
import datetime


# Create your models here.
class Book(models.Model):
    id = models.BigAutoField(primary_key=True)
    name = models.CharField(max_length=255, null=True)
    cover = models.CharField(max_length=255)
    author = models.CharField(max_length=255)
    price = models.DecimalField(decimal_places=2, max_digits=100000)
    is_delete = models.IntegerField()

    class Meta:
        managed = False
        db_table = 'book'


class User(models.Model):
    id = models.BigAutoField(primary_key=True)
    name = models.CharField(max_length=255, null=True)
    passwd = models.CharField(max_length=255, null=True)

    @property
    def token(self):
        return self._generate_jwt_token()

    def _generate_jwt_token(self):
        token = jwt.encode({
            'exp': datetime.utcnow() + datetime.timedelta(days=1),
            'iat': datetime.utcnow(),
            'data': {
                'name': self.name
            }
        }, settings.SECRET_KEY, algorithm='HS256')

        return token.decode('utf-8')

    class Meta:
        managed = False
        db_table = 'user'

上述代码会提示相关错误信息：'module' object has no attribute 'utcnow'

解决办法：

方式一:

import datetime

datetime.datetime.utcnow()

方式二: 我选用的方式

from datetime import datetime

datetime.utcnow()

修改后的代码片段截图