当代数据库管理系统课程实验二
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import sqlite3 as sqlite
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy import and_
from be.model import postgreSQLORM
from be.model.postgreSQLORM import Store_Book
from be.model.postgreSQLORM import New_Order_Detail
from be.model.postgreSQLORM import New_Order
from be.model.postgreSQLORM import User
import uuid
import json
import logging
import time
from be.model import db_conn
from be.model import error
from datetime import datetime
import threading
from datetime import timedelta
to_be_overtime={}
def overtime_append(key,value):#对to_be_overtime进行操作
global to_be_overtime
if key in to_be_overtime:
to_be_overtime[key].append(value)
else:
to_be_overtime[key]=[value]
class TimerClass(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.event = threading.Event()
def thread(self):
# threading.Thread(target=Buyer().auto_cancel(to_be_overtime[(datetime.utcnow() + timedelta(seconds=1)).second])).start()
# 上面这个,有利有弊利是超过一秒也能处理 弊是每有任何一次路由访问就要延时开一次线程次数秒
Buyer().auto_cancel(to_be_overtime[(datetime.utcnow() + timedelta(seconds=1)).second])
def run(self): # 每秒运行一次 将超时订单删去
global to_be_overtime
# schedule.every().second.do(thread)#每秒开一个线程去auto_cancel,做完的线程自动退出
while not self.event.is_set():
self.event.wait(1)
if (datetime.utcnow() + timedelta(seconds=1)).second in to_be_overtime:
self.thread()
# schedule.run_pending()
def cancel_timer(self):
self.event.set()
# tmr = TimerClass()#####################在无需测试自动取消订单test时删去 单独测取消订单请在test.sh中用
# #coverage run --timid --branch --source fe,be --concurrency=thread -m pytest -v -k fe/test/test_new_order.py --ignore=fe/data
# tmr.start()###################在无需测试自动取消订单test时删去
def tostop():
global tmr
tmr.cancel_timer()
def jwt_encode(user_id: str, terminal: str) -> str:
encoded = jwt.encode(
{"user_id": user_id, "terminal": terminal, "timestamp": time.time()},
key=user_id,
algorithm="HS256",
)
return encoded.decode("utf-8")
# decode a JWT to a json string like:
# {
# "user_id": [user name],
# "terminal": [terminal code],
# "timestamp": [ts]} to a JWT
# }
def jwt_decode(encoded_token, user_id: str) -> str:
decoded = jwt.decode(encoded_token, key=user_id, algorithms="HS256")
return decoded
class DateEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, datetime):
return obj.strftime("%Y-%m-%d %H:%M:%S")
else:
return json.JSONEncoder.default(self, obj)
class Buyer(db_conn.DBConn):
def __init__(self):
db_conn.DBConn.__init__(self)
def new_order(self, user_id: str, store_id: str, id_and_count: [(str, int)]) -> (int, str, str):
order_id = ""
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id) + (order_id, )
if not self.store_id_exist(store_id):
return error.error_non_exist_store_id(store_id) + (order_id, )
uid = "{}_{}_{}".format(user_id, store_id, str(uuid.uuid1()))
# print("touch0")
for book_id, count in id_and_count:
row = self.session.query(postgreSQLORM.Store_Book).filter(and_(postgreSQLORM.Store_Book.store_id==store_id,postgreSQLORM.Store_Book.book_id==book_id)).first()
# cursor = self.conn.execute(
# "SELECT book_id, stock_level, book_info FROM store "
# "WHERE store_id = ? AND book_id = ?;",
# (store_id, book_id))
# row = cursor.fetchone()
if row is None:
return error.error_non_exist_book_id(book_id) + (order_id, )
# stock_level = row[1]
# book_info = row[2]
stock_level = row.stock_level
book_info = row.book_info
book_info_json = json.loads(book_info)
price = book_info_json.get("price")
if stock_level < count:
return error.error_stock_level_low(book_id) + (order_id,)
# print("touch2")
row = self.session.query(Store_Book).filter(and_(Store_Book.store_id==store_id,Store_Book.book_id==book_id,Store_Book.stock_level>=count)).update({'stock_level':Store_Book.stock_level-count})
# cursor = self.conn.execute(
# "UPDATE store set stock_level = stock_level - ? "
# "WHERE store_id = ? and book_id = ? and stock_level >= ?; ",
# (count, store_id, book_id, count))
# if cursor.rowcount == 0:
# print("touch3")
if row == 0:
return error.error_stock_level_low(book_id) + (order_id, )
# print("touch4")
new_order_detail_entity = New_Order_Detail(order_id=uid,book_id=book_id,count=count,price=price)
# print("touch5")
row = self.session.add(new_order_detail_entity)
# self.session.commit()
# self.conn.execute(
# "INSERT INTO new_order_detail(order_id, book_id, count, price) "
# "VALUES(?, ?, ?, ?);",
# (uid, book_id, count, price))
# print("touch1")
timenow = datetime.utcnow()
creat_time = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime()) ## 订单创建时间
new_order_entity = New_Order(order_id=uid,store_id=store_id,user_id=user_id,creat_time=creat_time,status=0)
self.session.add(new_order_entity)
# self.conn.execute(
# "INSERT INTO new_order(order_id, store_id, user_id) "
# "VALUES(?, ?, ?);",
# (uid, store_id, user_id))
# self.conn.commit()
overtime_append(timenow.second,order_id) ##将刚下单的订单加入到overtime中管理
self.session.commit()
order_id = uid
except SQLAlchemyError as e:
logging.info("528, {}".format(str(e)))
return 528, "{}".format(str(e)), ""
except BaseException as e:
logging.info("530, {}".format(str(e)))
return 530, "{}".format(str(e)), ""
return 200, "ok", order_id
def payment(self, user_id: str, password: str, order_id: str) -> (int, str):
# conn = self.conn
session = self.session
try:
row = session.query(New_Order).filter(New_Order.order_id==order_id).first()
# cursor = conn.execute("SELECT order_id, user_id, store_id FROM new_order WHERE order_id = ?", (order_id,))
# row = cursor.fetchone()
if row is None:
return error.error_invalid_order_id(order_id)
# order_id = row[0]
# buyer_id = row[1]
# store_id = row[2]
order_id = row.order_id
buyer_id = row.user_id
store_id = row.store_id
if buyer_id != user_id:
return error.error_authorization_fail()
row = session.query(postgreSQLORM.User).filter(postgreSQLORM.User.user_id==buyer_id).first()
# cursor = conn.execute("SELECT balance, password FROM user WHERE user_id = ?;", (buyer_id,))
# row = cursor.fetchone()
if row is None:
return error.error_non_exist_user_id(buyer_id)
# balance = row[0]
balance = row.balance
pwd = row.password
if password != pwd:
return error.error_authorization_fail()
row = session.query(postgreSQLORM.User_Store).filter(postgreSQLORM.User_Store.store_id==store_id).first()
# cursor = conn.execute("SELECT store_id, user_id FROM user_store WHERE store_id = ?;", (store_id,))
# row = cursor.fetchone()
if row is None:
return error.error_non_exist_store_id(store_id)
# seller_id = row[1]
seller_id = row.user_id
if not self.user_id_exist(seller_id):
return error.error_non_exist_user_id(seller_id)
row = session.query(New_Order_Detail).filter(New_Order_Detail.order_id==order_id).all()
# cursor = conn.execute("SELECT book_id, count, price FROM new_order_detail WHERE order_id = ?;", (order_id,))
total_price = 0
# for row in cursor:
# count = row[1]
# price = row[2]
# total_price = total_price + price * count
for i in row:
count = i.count
price = i.price
total_price = total_price + price * count
if balance < total_price:
return error.error_not_sufficient_funds(order_id)
# print('touch0')
## 买家扣钱
row = session.query(User).filter(and_(User.balance>=total_price,User.user_id==buyer_id)).update({'balance':User.balance-total_price})
# cursor = conn.execute("UPDATE user set balance = balance - ?"
# "WHERE user_id = ? AND balance >= ?",
# (total_price, buyer_id, total_price))
# if cursor.rowcount == 0:
if row == 0:
return error.error_not_sufficient_funds(order_id)
# print('touch1')
## 卖家加钱
row = session.query(User).filter(User.user_id==seller_id).update({'balance':User.balance+total_price})
# cursor = conn.execute("UPDATE user set balance = balance + ?"
# "WHERE user_id = ?",
# (total_price, buyer_id))
# if cursor.rowcount == 0:
if row == 0:
return error.error_non_exist_user_id(buyer_id)
# print('touch2')
# row = session.query(New_Order).filter(New_Order.order_id==order_id).delete() 不在删除而是修改订单状态
row = session.query(New_Order).filter(New_Order.order_id==order_id).update({'status':1})
# cursor = conn.execute("DELETE FROM new_order WHERE order_id = ?", (order_id, ))
# if cursor.rowcount == 0:
if row == 0:
return error.error_invalid_order_id(order_id)
# row = session.query(New_Order_Detail).filter(New_Order_Detail.order_id==order_id).delete()
# cursor = conn.execute("DELETE FROM new_order_detail where order_id = ?", (order_id, ))
# if cursor.rowcount == 0:
if row == 0:
return error.error_invalid_order_id(order_id)
# conn.commit()
session.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
return 530, "{}".format(str(e))
return 200, "ok"
def add_funds(self, user_id, password, add_value) -> (int, str):
try:
row = self.session.query(postgreSQLORM.User).filter(postgreSQLORM.User.user_id==user_id).first()
# cursor = self.conn.execute("SELECT password from user where user_id=?", (user_id,))
# row = cursor.fetchone()
if row is None:
return error.error_authorization_fail()
pwd = row.password
if pwd != password:
return error.error_authorization_fail()
row = self.session.query(postgreSQLORM.User).filter_by(user_id=user_id).update({'balance':postgreSQLORM.User.balance+add_value,'user_id':user_id})
# cursor = self.conn.execute(
# "UPDATE user SET balance = balance + ? WHERE user_id = ?",
# (add_value, user_id))
if row == 0:
return error.error_non_exist_user_id(user_id)
self.session.commit()
# self.conn.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
return 530, "{}".format(str(e))
return 200, "ok"
def take_over(self, user_id, order_id):
session = self.session
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
row = session.query(New_Order).filter(and_(New_Order.order_id==order_id,New_Order.user_id==user_id)).first()
if row is None:
return error.error_invalid_order_id(order_id)
if row.status != 2:
return error.error_invalid_order_id(order_id)
row = session.query(New_Order).filter(and_(New_Order.order_id==order_id,New_Order.user_id==user_id)).update({'status':3})
if row == 0:
return error.error_invalid_order_id(order_id)
session.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
# print('touch3')
return 530, "{}".format(str(e))
return 200, "ok"
def order_cancel(self, user_id, order_id):
session = self.session
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
row = session.query(New_Order).filter(and_(New_Order.order_id==order_id,New_Order.user_id==user_id)).first()
if row is None:
return error.error_invalid_order_id(order_id)
if row.status != 0:
return error.error_invalid_order_id(order_id)
store_id = row.store_id
row2 = session.query(New_Order_Detail).filter(New_Order_Detail.order_id==order_id).first()
book_id = row2.book_id
count = row2.count
row3 = session.query(Store_Book).filter(and_(Store_Book.store_id==store_id,Store_Book.book_id==book_id)).update({'stock_level':Store_Book.stock_level+count})
row = session.query(New_Order).filter(and_(New_Order.order_id==order_id,New_Order.user_id==user_id)).update({'status':-1})
if row == 0:
return error.error_invalid_order_id(order_id)
session.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
# print('touch3')
return 530, "{}".format(str(e))
return 200, "ok"
def history_order(self, user_id):
session = self.session
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
row = session.query(New_Order).filter(New_Order.user_id==user_id).first()
if row is None:
return error.error_non_exist_user_id(user_id)
row = session.query(New_Order).filter(New_Order.user_id==user_id).order_by(New_Order.creat_time.desc()).all()
order_ids = []
for i in row:
order_ids.append(i.order_id)
session.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
# print('touch3')
return 530, "{}".format(str(e))
return 200, "ok", order_ids
def auto_cancel(self,order_id_list):#自动取消订单
exist_order_need_cancel=0
try:
for order_id in order_id_list:
row = self.session.query(New_Order).filter(New_Order.order_id==order_id).first()
if row is None:
return error.error_invalid_order_id(order_id)
#是否属于未付款订单
if row.status == 0:
timenow = datetime.utcnow()
check_time = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())
creat_time = row.creat_time
time_1_struct = datetime.strptime(creat_time, "%Y-%m-%d %H:%M:%S")
time_2_struct = datetime.strptime(check_time, "%Y-%m-%d %H:%M:%S")
seconds = (time_2_struct - time_1_struct).seconds
if seconds>= 30: ## 订单超过30秒为付款自动取消
store_id = row.store_id
row3 = self.session.query(New_Order).filter(New_Order_Detail.order_id==order_id).first()
book_id = row3.book_id
count = row3.count
self.session.query(Store_Book).filter(and_(Store_Book.store_id==store_id,Store_Book.book_id==book_id)).update({'stock_level':Store_Book.stock_level+count})
self.session.query(New_Order).filter(New_Order.order_id==order_id).update({'status':-1})
exist_order_need_cancel = 1
self.session.commit()
except SQLAlchemyError as e:
return 528, "{}".format(str(e))
except BaseException as e:
# print('touch3')
return 530, "{}".format(str(e))
return 'no_such_order' if exist_order_need_cancel==0 else "auto_cancel_done"