前言
在 Python
的 ORM
框架中,比较主流的有 Sqlalchemy
,peewee
,pony
等等。但是其中 peewee
和 Django
的 Models
框架很像,如果了解 Django
的同学肯定对 peewee
会很亲切。今天我们就一起走进 peewee
的世界。
peewee 的世界
安装
pip install peewee 复制代码
创建数据库&表
from peewee import * from datetime import date from playhouse.migrate import * # 如果db不存在,会自动创建 db = SqliteDatabase('pp.db') class people(Model): # 默认会有ID作为主键自增 name = CharField() birth = DateField() people_status = BooleanField(default=True) class Meta: database = db # connect db db.connect() # create table db.create_tables([ people, ]) # close db db.close() 复制代码
查看数据库
在当前路径下查看是否创建了 pp.db
,是否在数据库中创建了 people
表。
网络异常,图片无法展示
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网络异常,图片无法展示
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CURD-C
# add people phyger = people(name='phyger1',birth=date(1990,1,1)) phyger.save() # Too pp = people.create(name='phyger2',birth=date(1991,1,2)) pp.save() 复制代码
网络异常,图片无法展示
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CRUD-R
# search people res = people.get_by_id(1) print('ID为1的数据的name是:',res.name) # search all (list) ret = people.select() for i in ret: print(i.id, i.name) # where rep = people.select().where(people.name == 'phyger2').get() print('name为phyger2的ID是:',rep.id) rea = people.select().where(people.people_status == True) for i in rea: print(i.name) 复制代码
网络异常,图片无法展示
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CRUD-U
# update info rep = people.select().where(people.name == 'phyger2').get() # modify status rep.people_status=False # don't forget save rep.save() # search phyger2's status res = people.select().where(people.name == 'phyger2').get() print("phyger2's status is : ",res.people_status) 复制代码
网络异常,图片无法展示
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网络异常,图片无法展示
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CRUD-D
# delete info res = people.select().where(people.name == 'phyger1').get() res.delete_instance() res.save() 复制代码
网络异常,图片无法展示
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更多内容详见官方文档:
http://docs.peewee-orm.com/en/latest/peewee/quickstart.html 复制代码
以上就是今天的全部内容了,感谢您的阅读,我们下节再会。