krtk30

from django.db.models import Count, Max

unique_fields = ['field_1', 'field_2']

duplicates = (
    MyModel.objects.values(*unique_fields)
    .order_by()
    .annotate(max_id=Max('id'), count_id=Count('id'))
    .filter(count_id__gt=1)
)

krtk30

#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which

krtk30

#
# Wide-open CORS config for nginx
#
location / {

     if ($request_method = 'OPTIONS') {

        add_header 'Access-Control-Allow-Origin' '*';
        
        #

krtk30

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics
• SQL joins infografic

krtk30

from django.db import transaction

class AtomicMixin(object):
    """
    Ensures we rollback db transactions on exceptions.
    Idea from https://github.com/tomchristie/django-rest-framework/pull/1204
    """
    @transaction.atomic()
    def dispatch(self, *args, **kwargs):
        return super(AtomicMixin, self).dispatch(*args, **kwargs)

krtk30

import argparse
import os

import boto3


class S3MultipartUpload(object):
  # AWS throws EntityTooSmall error for parts smaller than 5 MB
  PART_MINIMUM = int(5e6)