Django框架之通过ORM（模型层）操作数据库修改表结构/表名

from django.db import models
# Create your models here.
'''
create table t1(
name varchar (32) unique not null
age int
)
'''
class Ncov(models.Model):
city = models.CharField(max_length=32,unique=True)
xinzengyisi = models.IntegerField()
#修改表结构,新增3个字段
xinzengquezhen = models.IntegerField(default=0)
leijiquezhen = models.IntegerField(default=0)
leijisiwang = models.IntegerField(default=0)
#修改表名
class Meta:
db_table = 'ncov'