# models
class UserInfo(models.Model):
  id = models.BigAutoField(primary_key=True)
  user_name = models.CharField(max_length=100, verbose_name='用户名')
  cellphone = models.CharField(max_length=100, blank=False, null=True, verbose_name='手机')
  password = models.CharField(max_length=225, verbose_name='密码')

datas = {'user_name': '张三'}
user = UserInfo.objects.filter(pk=1)
user.update(**datas)

import json
from test_case.models import Modules as m

data = {'a': 1, "b": 2}

#将字典变成字符串
datastr = json.dumps(data)
print(type(datastr), datastr)

#存入数据库
m.objects.create(name=datastr, item_id='10')

# 数据库中获取数据
data1 = m.objects.get(name=datastr).name

# 将数据变成字典
datadact = json.loads(data1)
print(type(datadact), datadact)

# 结果

<class 'str'> {"a": 1, "b": 2}
<class 'dict'> {'a': 1, 'b': 2}