peewee在flask中的配置

# 原文:https://blog.csdn.net/mouday/article/details/85332510
Flask的鈎子函數與peewee.InterfaceError: (0, '')
2018年12月28日 22:56:07 彭世瑜 閱讀數：70更多
個人分類： flask
版權聲明：本文為博主原創文章，歡迎轉載，請注明出處	https://blog.csdn.net/mouday/article/details/85332510
問題
使用flask搭了一個服務，用到了peewee模塊，運行時間長了就報錯

peewee.InterfaceError: (0, '')
1
百度上一搜，發現有自己的文章

peewee: OperationalError: (2006, ‘MySQL server has gone away’)

那個時候，處理的是peewee2版本的問題，如今又在處理peewee3的問題，真是問題多多

解決
查看peewee的issue，看到一個回到，給出兩個方案
1、使用flask-peewee 模塊
2、使用flask的鈎子函數

嘗試使用方案2：
request來的時候打開數據庫連接，response返回的時候關閉數據庫連接

根據文檔給出的代碼

from flask import Flask
from peewee import *

database = SqliteDatabase('my_app.db')
app = Flask(__name__)

# This hook ensures that a connection is opened to handle any queries
# generated by the request.
@app.before_request
def _db_connect():
    database.connect()

# This hook ensures that the connection is closed when we've finished
# processing the request.
@app.teardown_request
def _db_close(exc):
    if not database.is_closed():
        database.close()

from flask import Flask
from peewee import *

database = SqliteDatabase('my_app.db')
app = Flask(__name__)

# This hook ensures that a connection is opened to handle any queries
# generated by the request.
@app.before_request
def _db_connect():
    database.connect()

# This hook ensures that the connection is closed when we've finished
# processing the request.
@app.teardown_request
def _db_close(exc):
    if not database.is_closed():
        database.close()
--------------------- 
作者：彭世瑜 
來源：CSDN 
原文：https://blog.csdn.net/mouday/article/details/85332510 
版權聲明：本文為博主原創文章，轉載請附上博文鏈接！
參考：

https://github.com/coleifer/peewee/issues/1546
http://docs.peewee-orm.com/en/latest/peewee/database.html#flask
http://docs.peewee-orm.com/en/latest/peewee/database.html#error-2006-mysql-server-has-gone-away