Yogendra0Sharma

Basic Mongo shell commands

mongo             //Start mongo shell
show dbs          //Display databases
use mydb          //Start using 'mydb' database
db                //Display current database
show collections  //Display collections
help              //help

Yogendra0Sharma

# Get documents, where writters are Joel Coen and Ethan Coen.
db.movieDetails.find({ "writters" : ["Joel Coen", "Ethan Coen"] }).count()

# Get documents, where Jeff Bridges is playing leading role.
> db.movieDetails.find({ "actors.0": "Jeff Bridges" }).pretty()

Yogendra0Sharma

#!/bin/sh
# Cleanup docker files: untagged containers and images.
#
# Use `docker-cleanup -n` for a dry run to see what would be deleted.

untagged_containers() {
    # Print containers using untagged images: $1 is used with awk's print: 0=line, 1=column 1.
    # NOTE: "[0-9a-f]{12}" does not work with GNU Awk 3.1.7 (RHEL6).
    # Ref: https://github.com/blueyed/dotfiles/commit/a14f0b4b#commitcomment-6736470
    docker ps -a | tail -n +2 | awk '$2 ~ "^[0-9a-f]+$" {print $'$1'}'

Yogendra0Sharma

# Ask for the user password
# Script only works if sudo caches the password for a few minutes
sudo true

# Install kernel extra's to enable docker aufs support
sudo apt-get -y install linux-image-extra-$(uname -r)

# Add Docker PPA and install latest version
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

Yogendra0Sharma

python manage.py shell:

>>> sql = '''drop table mytable cascade;
...          drop table mytable2; '''
>>> 
>>> from django.db import connections, transaction
>>> cursor = connections['default'].cursor()
>>> cursor.execute(sql)

Yogendra0Sharma

var myApp = angular.module('myApp').config(function($httpProvider) {
    $httpProvider.defaults.headers.post['X-CSRFToken'] = $('input[name=csrfmiddlewaretoken]').val();
});

Yogendra0Sharma

// service.js
angular.service('Address', function($resource, $cookies, $xhr, $log) {

  // Add Header to comply with Django's CSRF implementation
  token = $cookies['csrftoken'];
  $xhr.defaults.headers['delete']['X-CSRFToken'] = token;

  return $resource('/api/user/address/:addressId', {addressId:'@id'}, {});
});

Yogendra0Sharma

First create backend endpoints using Django Rest Framework:

task/models

from django.db import models
class Task(models.Model):
    completed = models.BooleanField(default=False)
    title = models.CharField(max_length=100)
    description = models.TextField()

Yogendra0Sharma

"""
filename: angularjs.py

Usage:
    {% ng Some.angular.scope.content %}

e.g.
    {% load angularjs %}
    <div ng-init="yourName = 'foobar'">
        <p>{% ng yourName %}</p>

Yogendra0Sharma

Python Virtual Environment Howto

##SETUP VIRTUALENV on Ubuntu Server

console: ~ $ sudo apt-get install python-virtualenv
console: ~ $ virtualenv python #Careful where you call this command as it creates a folder in the current directory
console: ~ $ source ./python/bin/activate
console: ~ $ deactivate

• IF YOU WANT TO DELETE A VIRTUALENV JUST DELETE THE FOLDER