Python的ORM框架Peewee使用入门(二)

人生的磨难是很多的，所以我们不可对于每一件轻微的伤害都过于敏感。在生活磨难面前，精神上的坚强和无动于衷是我们抵抗罪恶和人生意外的最好武器。

改数据，删数据

from datetime import date
from peewee import *

db = SqliteDatabase('people.db')

class Person(Model):
name = CharField()
birthday = DateField()
is_relative = BooleanField()
class Meta:
database = db   #用了“people.db”数据库

class Pet(Model):
owner = ForeignKeyField(Person, related_name='pets')
name = CharField()
animal_type = CharField()
class Meta:
database = db  #用了“people.db”数据库

"""-------------------------------------------------------------------------------------------------------"""
uncle_bob = Person(name='Bob', birthday=date(1960, 1, 15), is_relative=True)
uncle_bob.save()

grandma = Person.create(name='Grandma', birthday=date(1935, 3, 1), is_relative=True)
herb = Person.create(name='Herb', birthday=date(1950, 5, 5), is_relative=False)
grandma.name = 'Grandma L.'
grandma.save()  #更新数据库中的grandma的名字

bob_kitty = Pet.create(owner=uncle_bob, name='Kitty', animal_type='cat')
herb_fido = Pet.create(owner=herb, name='Fido', animal_type='dog')
herb_mittens = Pet.create(owner=herb, name='Mittens', animal_type='cat')
herb_mittens_jr = Pet.create(owner=herb, name='Mittens Jr', animal_type='cat')
"""---------------------------------------------------"""
herb_mittens.delete_instance() #删除
""""""
herb_fido.owner = uncle_bob
herb_fido.save()
bob_fido = herb_fido