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

快来打我* 2023-10-10 13:13 38阅读 0赞

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

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210811165125851.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n,size_16,color_FFFFFF,t_70