peewee

Peewee MySQL server has gone away

由 一笑奈何 提交于 2019-12-05 11:53:32
I use flask and peewee. Sometimes peewee throws this error MySQL server has gone away (error(32, 'Broken pipe')) Peewee database connection db = PooledMySQLDatabase(database,**{ "passwd": password, "user": user, "max_connections":None,"stale_timeout":None, "threadlocals" : True }) @app.before_request def before_request(): db.connect() @app.teardown_request def teardown_request(exception): db.close() After mysql error that "MySQL server has gone away (error(32, 'Broken pipe'))", select queries works without problem, but insert,update,delete queries don't work. On insert,update,delete queries

How to do query with `WHERE value IN list` in the Python Peewee ORM?

由 拥有回忆 提交于 2019-12-05 00:34:07
I'm using the (awesome) Python Peewee ORM for my Flask project, but I now got stuck trying to do a query with a where value in ['a', 'b', 'c'] . I tried doing it as follows: MyModel.select().where(MyModel.sell_currency in ['BTC', 'LTC']) But unfortunately it returns all records in the DB. Any ideas how I could do this? ambi The docs has the answer: x << y will perform x IN y, where y is a list or query . So the final query will look like: MyModel.select().where(MyModel.sell_currency << ['BTC', 'LTC']) Oscar Javier Jimenez You can also do "IN" expressions with a subquery. For example, to get

Can peewee nest SELECT queries such that the outer query selects on an aggregate of the inner query?

由 佐手、 提交于 2019-12-04 16:31:39
I'm using peewee2.1 with python3.3 and an sqlite3.7 database. I want to perform certain SELECT queries in which: I first select some aggregate (count, sum), grouping by some id column; then I then select from the results of (1), aggregating over its aggregate. Specifically, I want to count the number of rows in (1) that have each aggregated value. My database has an 'Event' table with 1 record per event, and a 'Ticket' table with 1..N tickets per event. Each ticket record contains the event's id as a foreign key. Each ticket also contains a 'seats' column that specifies the number of seats

Python Peewee execute_sql() example

由 此生再无相见时 提交于 2019-12-04 10:29:51
问题 I am using the Peewee module as the ORM for my project. I read the entire documentation, there is no clear example on how to process the result from db.execute_sql(). I traced the code, only can find db.execute_sql() return back the cursor. Does anyone knows how to process the cursor, such as iterate over it and get back the result from complex select statement. Update: I just found the following source code from peewee folder, it should help me to resolve this problem. class

Why is peewee including the 'id' column into the mysql select query?

由 一笑奈何 提交于 2019-12-03 12:10:35
问题 I am trying to learn how to use peewee with mysql. I have an existing database on a mysql server with an existing table. The table is currently empty (I am just testing right now). >>> db = MySQLDatabase('nhl', user='root', passwd='blahblah') >>> db.connect() >>> class schedule(Model): ... date = DateField() ... team = CharField() ... class Meta: ... database = db >>> test = schedule.select() >>> test <class '__main__.schedule'> SELECT t1.`id`, t1.`date`, t1.`team` FROM `nhl` AS t1 [] >>>

Accessing remote MySQL database with peewee

由 半世苍凉 提交于 2019-12-03 08:39:52
问题 I'm trying to connect to a MySQL database on Amazon's RDS using peewee and I can't get it to work. I'm new to databases so I'm probably doing something stupid, but this is what I'm trying: import peewee as pw myDB = pw.MySQLDatabase(host="mydb.crhauek3cxfw.us-west-2.rds.amazonaws.com",port=3306,user="user",passwd="password",db="mydb") class MySQLModel(Model): """A base model that will use our MySQL database""" class Meta: database = myDB class User(MySQLModel): username = CharField() myDB

Reconnecting MySQL on timeout

由 萝らか妹 提交于 2019-12-03 06:34:29
I have a Python program which runs on background for weeks, and does database queries every once in a while. For that, I am using the ORM peewee (version 2.2.1). I am using MySQL as a backend. Lately I've encountered a recurring problem with accessing the DB, usually after days of running the program. The error which is raised by peewee is peewee.OperationalError: (2006, 'MySQL server has gone away') The traceback is deep in peewee . I post it here, but as my virtualenv makes filenames too long, I am shortening them: File ".../local/lib/python2.7/site-packages/peewee.py", line 2910, in save

Getting peewee to work on elastic beanstalk

由 梦想的初衷 提交于 2019-12-02 10:48:09
问题 I'm trying to install the peewee package on an elastic beanstalk instance to control a bottle application. I think the problem is with the MySQL-python dependency, but peewee doesn't load either. My requirements file looks like this: bottle==0.11.6 peewee==2.1.1 MySQL-python I also tried MySQL-python as MySQL-python==1.2.4b4 . For a number of reasons which I believe are summed up here, this doesn't work; peewee isn't installed and I get this error message in the log: 2013-05-18 06:57:08,407

How to select dummy column in peewee?

由 佐手、 提交于 2019-12-02 04:31:11
问题 how to do select 'blah' as dummycolumn in peewee?? I have tried MyTable.select('blah') but it is not working 回答1: MyModel.select( MyModel.some_field.alias('another_name'), Value('a string literal').alias('a_string'), Value(12345).alias('a_number')) 来源： https://stackoverflow.com/questions/36395229/how-to-select-dummy-column-in-peewee

Getting peewee to work on elastic beanstalk

由 点点圈 提交于 2019-12-02 04:24:32
I'm trying to install the peewee package on an elastic beanstalk instance to control a bottle application. I think the problem is with the MySQL-python dependency, but peewee doesn't load either. My requirements file looks like this: bottle==0.11.6 peewee==2.1.1 MySQL-python I also tried MySQL-python as MySQL-python==1.2.4b4 . For a number of reasons which I believe are summed up here , this doesn't work; peewee isn't installed and I get this error message in the log: 2013-05-18 06:57:08,407 [INFO] (15947 MainThread) [directoryHooksExecutor.py-29] [root directoryHooksExecutor info] Script
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