1、忘记这两行代码
queryset = Book.objects.all()
serializer_class = Book_ModelSerializer
AssertionError: 'Publish_GAPIView' should either include a `queryset` attribute, or override the `get_queryset()` method.
2、要返回Response对象
AssertionError: Expected a `Response`, `HttpResponse` or `HttpStreamingResponse` to be returned from the view, but received a `<class 'NoneType'>`
3、配置文件应用里没注册标签'admin'
LookupError:No installed app with label 'admin'
4、视图类的方法写错了。
Method Not Allowed: /uuser/
5、外键字段错误。
django.core.exceptions.FieldError: Cannot resolve keyword 'user' into field. Choices are: fk_user, fk_user_id, id, token
6、postman的请求方式错了
rest_framework.request.WrappedAttributeError: 'NoneType' object has no attribute 'fk_user'
7、响应Response类有序列化功能，对象不能序列化。
TypeError: Object of type 'User' is not JSON serializable
8、base64解码时报错，base64的长度是固定的，不够用=补。
return binascii.a2b_base64(s)
