当代数据库管理系统课程实验二
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import sqlite3 as sqlite
from be.model import error
from be.model import db_conn
class Seller(db_conn.DBConn):
def __init__(self):
db_conn.DBConn.__init__(self)
def add_book(self, user_id: str, store_id: str, book_id: str, book_json_str: str, stock_level: int):
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
if not self.store_id_exist(store_id):
return error.error_non_exist_store_id(store_id)
if self.book_id_exist(store_id, book_id):
return error.error_exist_book_id(book_id)
self.conn.execute("INSERT into store(store_id, book_id, book_info, stock_level)"
"VALUES (?, ?, ?, ?)", (store_id, book_id, book_json_str, stock_level))
self.conn.commit()
except sqlite.Error as e:
return 528, "{}".format(str(e))
except BaseException as e:
return 530, "{}".format(str(e))
return 200, "ok"
def add_stock_level(self, user_id: str, store_id: str, book_id: str, add_stock_level: int):
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
if not self.store_id_exist(store_id):
return error.error_non_exist_store_id(store_id)
if not self.book_id_exist(store_id, book_id):
return error.error_non_exist_book_id(book_id)
self.conn.execute("UPDATE store SET stock_level = stock_level + ? "
"WHERE store_id = ? AND book_id = ?", (add_stock_level, store_id, book_id))
self.conn.commit()
except sqlite.Error as e:
return 528, "{}".format(str(e))
except BaseException as e:
return 530, "{}".format(str(e))
return 200, "ok"
def create_store(self, user_id: str, store_id: str) -> (int, str):
try:
if not self.user_id_exist(user_id):
return error.error_non_exist_user_id(user_id)
if self.store_id_exist(store_id):
return error.error_exist_store_id(store_id)
self.conn.execute("INSERT into user_store(store_id, user_id)"
"VALUES (?, ?)", (store_id, user_id))
self.conn.commit()
except sqlite.Error as e:
return 528, "{}".format(str(e))
except BaseException as e:
return 530, "{}".format(str(e))
return 200, "ok"