Django之序列化

Django中的序列化主要是在数据库中扫描数据返回给客服端用户

serializers

from django.core import serializers

ret = models.UserInfo.objects.all() 
data = serializers.serialize("json", ret)

json.dumps

import json
 
#ret = models.UserInfo.objects.all().values('username')
ret = models.UserInfo.objects.all().values_list('username')
 
ret=list(ret)
 
result = json.dumps(ret)

json.dumps无法处理datetime时期格式可以自己定义

import json
from datetime import date
from datetime import datetime

d=datetime.now()


class JsonCustomEncoder(json.JSONEncoder):

    def default(self, field):

        if isinstance(field, datetime):
            return field.strftime('%Y-%m-%d %H:%M---%S')
        elif isinstance(field, date):
            return field.strftime('%Y-%m-%d')
        else:
            return json.JSONEncoder.default(self, field)


ds = json.dumps(d, cls=JsonCustomEncoder)

print(ds)
print(type(ds))



'''
Supports the following objects and types by default:

    +-------------------+---------------+
    | Python            | JSON          |
    +===================+===============+
    | dict              | object        |
    +-------------------+---------------+
    | list, tuple       | array         |
    +-------------------+---------------+
    | str               | string        |
    +-------------------+---------------+
    | int, float        | number        |
    +-------------------+---------------+
    | True              | true          |
    +-------------------+---------------+
    | False             | false         |
    +-------------------+---------------+
    | None              | null          |
    +-------------------+---------------+

'''