peewee是一款orm框架，为什么选择peewee，是因为它比较简单和Django比较类似，而且还有一个async-peewee，可以进行异步化。
如何定义model和生成表
'''
我们要定义两张表，一张商品，一张商品供应商。商品表里面有一个外键对应商品供应商
'''
import peewee
# 第一个参数是我们数据库的名字，其他的参数则跟pymysql一样
db = peewee.MySQLDatabase("satori", host="localhost", port=3306, user="root", password="zgghyys123")
# 定义供应商
class Supplier(peewee.Model):
# max_length：最大长度。verbose_name：注释信息。index：是否设置为索引
name = peewee.CharField(max_length=100, verbose_name="供应商名称", index=True)
address = peewee.CharField(max_length=200, verbose_name="供应商地址")
phone = peewee.CharField(max_length=11, verbose_name="联系电话")
class Meta:
# 和Django比较类似，绑定一个数据库实例
database = db
# 设置表名
table_name = "supplier"
class Goods(peewee.Model):
# 我们这里没有指定主键，那么会默认创建一个id列作为主键，如果SQLAlchemy的话必须要自己指定
name = peewee.CharField(max_length=100, verbose_name="商品名称", index=True)
click_num = peewee.IntegerField(default=0, verbose_name="点击数")
goods_num = peewee.IntegerField(default=0, verbose_name="库存")
price = peewee.FloatField(default=0.0, verbose_name="价格")
brief = peewee.TextField(verbose_name="商品简介")
# 绑定外键,和Django一样
# backref：反向引用。既然定义了外键，我们可以在Goods可以通过supplier访问到Supplier。
# 那么如何通过Supplier访问到Goods呢？那么就可以通过backref指定的goods来访问。这个SQLAlchemy也是一样的
# 但SQLAlchemy中，我们不仅要自己指定外键，并且定义反向引用的时候还要导入一个relationship
supplier = peewee.ForeignKeyField(Supplier, verbose_name="供应商", backref="goods")
class Meta:
database = db
table_name = "goods"
if __name__ == '__main__':
# 以上表便定义完成了，下面映射到数据库
# 直接使用db.create_tables即可,将要映射成表的模型放在列表里传进去
db.create_tables([Goods, Supplier])
model的数据保存
# 导入模型
from model import Goods, Supplier
supplier_list = [
{
"name": "淘宝",
"address": "杭州",
"phone": "15548452158"
},
{
"name": "天猫",
"address": "杭州",
"phone": "15422584552"
},
{
"name": "京东",
"address": "北京",
"phone": "15424896324"
},
{
"name": "蘑菇街",
"address": "上海",
"phone": "15545221485"
}
]
goods_list = [
{
"name": "护舒宝",
"click_num": 100,
"goods_num": 666,
"price": 10,
"brief": "防侧漏",
"supplier": 1,
},
{
"name": "苏菲",
"click_num": 120,
"goods_num": 874,
"price": 8,
"brief": "双面侧翼，安心无忧",
"supplier": 2,
},
{
"name": "毓婷",
"click_num": 60,
"goods_num": 541,
"price": 30,
"brief": "有毓婷，放心爱",
"supplier": 3
},
{
"name": "冈本001",
"click_num": 5800,
"goods_num": 1500,
"price": 60,
"brief": "冈本超薄，给您最极致的体验",
"supplier": 4
}
]
def save_model():
# 添加单个元素直接这样添加即可， 然后使用save保存
'''
supplier = Supplier()
supplier.name = "淘宝"
supplier.address = "杭州"
supplier.phone = "15841259841"
supplier.save()
'''
# 添加多个元素的话
for data in supplier_list:
supplier = Supplier()
supplier.name = data["name"]
supplier.address = data["address"]
supplier.phone = data["phone"]
supplier.save()
for data in goods_list:
'''
也可以这样添加
goods = Goods(name=data["name"], click_num=data["click_num"], goods_num=data["goods_num"], price=data["price"], brief=data"brief"])
'''
# data里的key要和Goods模型定义的列名保持一致
goods = Goods(**data)
goods.save()
if __name__ == '__main__':
save_model()
