The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.
Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.
| /* | |
| Used like this... | |
| detectIE('class-to-add-to-html-tag') | |
| */ | |
| function detectIE (classToAdd) { | |
| 'use strict' |
| from django.conf import settings | |
| from django.core.files.storage import Storage | |
| from django.utils import importlib | |
| def load_class(class_string): | |
| class_module, class_name = class_string.rsplit('.', 1) | |
| class_module = importlib.import_module(class_module) | |
| return getattr(class_module, class_name) |
| virtualenv --no-site-packages . | |
| source bin/activate | |
| bin/pip install Django psycopg2 django-sentry | |
| bin/pip freeze > requirements.txt | |
| bin/django-admin.py startproject mysite | |
| cat >.gitignore <<EOF | |
| bin/ | |
| include/ | |
| lib/ | |
| EOF |
| # -*- coding: utf-8 -*- | |
| import os | |
| from flask import Flask | |
| from flask_heroku import Heroku | |
| from flask_sslify import SSLify | |
| from raven.contrib.flask import Sentry | |
| from flask.ext.celery import Celery |
| // Provides a device_scale class on iOS devices for scaling user | |
| // interface elements relative to the current zoom factor. | |
| // | |
| // http://37signals.com/svn/posts/2407-device-scale-user-interface-elements-in-ios-mobile-safari | |
| // Copyright (c) 2010 37signals. | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal | |
| // in the Software without restriction, including without limitation the rights | |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| "Memcached cache backend" | |
| from django.core.cache.backends import memcached | |
| from django.utils.encoding import smart_unicode, smart_str | |
| MIN_COMPRESS_LEN = 150000 | |
| class CacheClass(memcached.CacheClass): | |
| def add(self, key, value, timeout=None, min_compress_len=MIN_COMPRESS_LEN): | |
| if isinstance(value, unicode): |
| Save the supervisord.initscript script as /etc/init.d/supervisord | |
| Run /usr/sbin/update-rc.d -f supervisord defaults |
| # This code grabs all unknown browsers in django-request on a django project. | |
| from request.models import Request | |
| from request.utils import browsers | |
| requests = Request.objects.this_month().only('user_agent') | |
| user_agents = [request.user_agent for request in requests] | |
| unknown_agents = [agent for agent in user_agents if browsers.resolve(agent)[0] == 'Unknown'] | |
| print unknown_agents |