shell
在虚拟环境中,可以使用python manage.py shell,打开命令行。在命令行中,所见即所得,相当于执行代码片段
对象
python
from django.db import models
# Create your models here.
class BookInfo(models.Model):
name = models.CharField(max_length=10,unique=True)
pub_date = models.DateTimeField(null=True)
read_count = models.IntegerField(default=0)
commentcount = models.IntegerField(default=0)
is_delete = models.BooleanField(default=False)
class Meta:
# 修改表的名称
db_table = 'bookinfo'
# 站点使用
verbose_name = '书籍管理'
class PeopleInfo(models.Model):
# 创建字典
GENDER_CHOICE = (
(0,'male'),
(1,'female')
)
name = models.CharField(max_length=10, verbose_name='名称')
gender = models.SmallIntegerField(choices=GENDER_CHOICE,default=0,verbose_name='性别')
description = models.CharField(max_length=300,verbose_name='描述',null=True)
is_delete = models.BooleanField(default=False,verbose_name='逻辑删除')
book = models.ForeignKey(BookInfo,on_delete=models.CASCADE)
def __str__(self):
return self.name
class Meta:
# 修改表的名称
db_table = 'peopleinfo'
# 站点使用
verbose_name = '读者信息'
创建一个python
创建crud-demo.py,用来写代码(方便),之后拷贝到shell里面
from book.models import BookInfo
python
# 1.新增
# 方式1
book = BookInfo(
name="完美世界",
pub_date= "2019-01-01",
read_count=10000,
commentcount=1000000
);
# 手动保存
book.save()
# 方式2
BookInfo.objects.create(
name="斗罗大陆",
pub_date= "2018-10-01",
read_count=2000,
commentcount=200000
);
# 修改
# 方式1
book = BookInfo.objectt.get(id=3)
book.read_count = 300000
book.save()
# 方式2
column = BookInfo.objects.filter(id=6).update(read_count=6000)
print(column)
# 删除
# 方式1
BookInfo.objects.filter(id=6).delete();
# 方式2
BookInfo.objects.get(id=8).delete();