adamJLev

# NOTE This is probably no longer needed, now DRF does this 
# automatically if you have ATOMIC_REQUESTS enabled.
# https://github.com/encode/django-rest-framework/pull/2887


from django.db import transaction

class AtomicMixin(object):
    """
    Ensures we rollback db transactions on exceptions.

freewayz

#After looking for a way to check if a model instance can be deleted in django , 
#i came across many sample, but was not working as expected. Hope this solution can help.

#Let start by creating an Abstract model class which can be inherited by other model

    class ModelIsDeletable(models.Model):
        name = models.CharField(max_length=200, blank=True, null=True, unique=True)
        description = models.CharField(max_length=200, blank=True, null=True)
        date_modified = models.DateTimeField(auto_now_add=True)
    

darraghoriordan

{
  "root": "build/",
  "clean_urls": false,
  "routes": {
    "/**": "index.html"
  }
}

nnja

Tips for using less on the command line.

To navigate:

• f = for next page
• b = for previous page

To search:

• /<query>

raheemazeezabiodun

def slow_fibonacci_number(n):
    if n <= 1:
        return n
    return slow_fibonacci_number(n - 1) + slow_fibonacci_number(n - 2)


def fast_fibonacci_number(n):
    numbers = [0, 1]
    for num in range(2, n+1):
        numbers.append(numbers[num - 1] + numbers[num - 2])

raheemazeezabiodun

def slow_gcd(arg1,arg2):
    gcd = 0
    for num in range(1, arg1 + arg2+ 1):
        if (arg1 % num == 0) and (arg2 %num == 0):
            gcd = num
    return gcd


def fast_gcd(arg1,arg2):
    if arg2 == 0:

raheemazeezabiodun

"""
This demonstrates how to use singledispatch for dispatching on type

We want to draw each based on the type. Typically, we can use if else statement to check the type
then call the function that does draw the shape, however, we will keep having multiple if elif statement.

This is just another pythonic way of doing it
"""

from functools import singledispatch

cpursley

PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• Just use Postgres
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs