vaibhav-jain

from django.db import models
from django.db.models import Manager
from django.db.models.query import QuerySet

class CaseInsensitiveQuerySet(QuerySet):
  def _filter_or_exclude(self, mapper, *args, **kwargs):
  # 'name' is a field in your Model whose lookups you want case-insensitive by default
    if 'name' in kwargs:
      kwargs['name__iexact'] = kwargs['name']
      del kwargs['name']

vaibhav-jain

# Start the old vagrant
$ vagrant init centos-6.3
$ vagrant up

# You should see a message like:
#  [default] The guest additions on this VM do not match the install version of
#  VirtualBox! This may cause things such as forwarded ports, shared
#  folders, and more to not work properly. If any of those things fail on
#  this machine, please update the guest additions and repackage the
#  box.

vaibhav-jain

from django.utils.translation import ugettext_lazy as _
from rest_framework import serializers


class SomeSerializer(serializers.ModelSerializer):
  """
  Demostrating How to Override DRF UniqueTogetherValidator Message
  """

    class Meta:

vaibhav-jain

import pytz
import six


class TimezoneField(serializers.Field):

    def to_representation(self, obj):
        return six.text_type(obj)

    def to_internal_value(self, time_zone):

vaibhav-jain

# Set inotify watch limit high enough for IntelliJ IDEA (PhpStorm, PyCharm, RubyMine, WebStorm).
# Create this file as /etc/sysctl.d/60-jetbrains.conf (Debian, Ubuntu), and
# run `sudo service procps start` or reboot.
# Source: https://confluence.jetbrains.com/display/IDEADEV/Inotify+Watches+Limit
# 
# More information resources:
# -$ man inotify  # manpage
# -$ man sysctl.conf  # manpage
# -$ cat /proc/sys/fs/inotify/max_user_watches  # print current value in use

vaibhav-jain

Backend Architectures

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

• Scaling Twitter: Making Twitter 10000 Percent Faster
• Scaling Twitter
• Blaine Cook on Scaling Twitter - YouTube

vaibhav-jain

from django.core.cache import caches


def get_request_cache():
    return caches['default']


class RequestCacheMiddleware(object):
    """
    Usage:

vaibhav-jain

<iframe id="tweet-button" allowtransparency="true" frameborder="0" scrolling="no"
            src="http://platform.twitter.com/widgets/tweet_button.html?via=marcus_christie&amp;text=Replace%20Me&amp;count=horizontal"
            style="width:110px; height:20px;"></iframe>

vaibhav-jain

// REQUIRED: Include "jQuery Query Parser" plugin here or before this point: 
// 	     https://github.com/mattsnider/jquery-plugin-query-parser

$(document).ready(function(){
	
// BOOTSTRAP 3.0 - Open YouTube Video Dynamicaly in Modal Window
// Modal Window for dynamically opening videos
$('a[href^="http://www.youtube.com"]').on('click', function(e){
  // Store the query string variables and values
	// Uses "jQuery Query Parser" plugin, to allow for various URL formats (could have extra parameters)

vaibhav-jain

==============
 git commands
==============

To rename branch
=================
git branch -m old_branch new_branch         # Rename branch locally    
git push origin :old_branch                 # Delete the old branch    
git push --set-upstream origin new_branch   # Push the new branch, set local branch to track the new remote