peewee在flask中的配置

# 原文:https://blog.csdn.net/mouday/article/details/85332510
Flask的钩子函数与peewee.InterfaceError: (0, '')
2018年12月28日 22:56:07 彭世瑜 阅读数：70更多
个人分类： flask
版权声明：本文为博主原创文章，欢迎转载，请注明出处   https://blog.csdn.net/mouday/article/details/85332510
问题
使用flask搭了一个服务，用到了peewee模块，运行时间长了就报错

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

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

那个时候，处理的是peewee2版本的问题，如今又在处理peewee3的问题，真是问题多多

解决
查看peewee的issue，看到一个回到，给出两个方案
1、使用flask-peewee 模块
2、使用flask的钩子函数

尝试使用方案2：
request来的时候打开数据库连接，response返回的时候关闭数据库连接

根据文档给出的代码

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 
来源：CSDN 
原文：https://blog.csdn.net/mouday/article/details/85332510 
版权声明：本文为博主原创文章，转载请附上博文链接！
参考：

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