v0.1 fastapi: route + model + orm

model/order.py

@@ -0,0 +1,56 @@
+from pydantic import BaseModel
+
+from sqlalchemy.orm import declarative_base,sessionmaker
+from sqlalchemy import Column, Integer,String,DATETIME,create_engine
+
+from datetime import datetime
+
+db_url = "mysql+pymysql://geeker:geeker@127.0.0.1:3306/fastapi_tutor?charset=utf8mb4"
+engine = create_engine(db_url)
+
+
+def get_session():
+    Session = sessionmaker(bind=engine
+                           , autoflush=False
+                           , autocommit=False
+                           )
+    yield Session()
+
+# 定义创建订单的请求体模型
+class OrderRequest(BaseModel):
+    id:int|None = None
+    title:str|None = None
+    userid:int|None =None
+
+class OrderResponse(BaseModel):
+    id:int|None = None
+    title:str|None = None
+    userid:int|None =None
+    create_date:datetime|None = datetime.now()
+    update_date:datetime|None = datetime.now()
+    status_code:str|None = 200
+    detail:str|None = 'succeed!'
+
+
+Base = declarative_base()  # 执行函数，返回一个基类
+class Order(Base):   # python里的表名字
+    __tablename__ = 'order_info_detail'  # 实际数据库的表名字
+    id = Column( Integer  # 声明字段的数据类型
+                 , primary_key=True  # 声明是主键
+                 , autoincrement=True # 声明是自增主键
+                 , comment='订单编号，自增主键'  # 注释
+                 )
+    title = Column( String(50)  # 对应数据库的varchar类型
+                    ,nullable=False  # 不允许为null
+                    )
+    userid = Column( Integer
+                     # ,ForeignKey('user_info_detail.id')
+                     ,nullable=False )  # 外键约束
+    create_date = Column(DATETIME
+                         , default=datetime.now  # 默认值是当前时间
+                         )
+    update_date = Column(DATETIME
+                         , default=datetime.now  # 首次创建的时间跟更新时间一致
+                         , onupdate=datetime.now
+                         )
+Order.__table__.create(engine,checkfirst = True)