Todo App using Django Rest Framework and Cassandra DataBase

Designing Restful Api for pulling data from Cassandra Databases using Django Framework

Technologies used

• Django: The web framework for perfectionists with deadlines (Django builds better web apps with less code).
• DRF: A powerful and flexible toolkit for building Web APIs
• Django_Cassandra_Engine: first Cassandra backend for Django Framework.

Installation

• If you wish to run your own build, first ensure you have python globally installed in your computer. If not, you can get python here.

• After doing this, confirm that you have installed virtualenv globally as well. If not, run this:

      $ pip install virtualenv

• Now, create a virtual environment within the project directory by typing

      $ virtualenv newenv

• To install packages into the isolated environment, you must activate the virtual enviroment by typing

      $ source newenv/bin/activate

• Set-up Cassandra into your system

  • Add a Personal Package Archives (PPA) using this command to install Oracle JRE package

      sudo add-apt-repository ppa:webupd8team/java

  • Update the package database:

      sudo apt-get update

  • Then install the Oracle JRE

     sudo apt-get install oracle-java8-set-default

  • After installing it, verify that it's now the default JRE:

       java -version

  • We’ll install Cassandra using packages from the official Apache Software Foundation repository provided by Datastax, so start by adding the repo so that the packages are available to your system.
  • DataStax source for stable version of Cassandra

      echo "deb http://debian.datastax.com/community stable main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

  • To avoid package signature warnings during package updates, we need to add three public keys from the Apache Software Foundation associated with the package repositories.

      gpg --keyserver pgp.mit.edu --recv-keys F758CE318D77295D

      gpg --export --armor F758CE318D77295D | sudo apt-key add -

      gpg --keyserver pgp.mit.edu --recv-keys 2B5C1B00
  

      gpg --export --armor 2B5C1B00 | sudo apt-key add -

      gpg --keyserver pgp.mit.edu --recv-keys 0353B12C

      gpg --export --armor 0353B12C | sudo apt-key add -

  • Update the package database once again:

      sudo apt-get update

  • Finally, install Cassandra

      sudo apt-get install cassandra

  • If you were able to successfully start Cassandra, check the status of the cluster. If the status is UN, it means it's Up and Normal.

      sudo nodetool status

  • Then connect to it using its interactive command line interface cqlsh.

      cqlsh

  • Type exit to quit

      exit

• Then, Git clone this repo to your PC

      $ git clone https://github.com/hasan356/Todo_App.git

  • Dependencies

  1. Cd into your the cloned repo as such:

         $ cd Todo_App/myproject/

  2. Install the dependencies needed to run the app:

         $ pip install -r requirements.txt

  3. Make those migrations work Sync it with Cassandra DB

         $ python manage.py sync_cassandra

REST_API

# http://localhost:8000/todo api for creating the todo task
# http://localhost:8000/todo/<key>/detail to see the detail of specific task
# http://localhost:8000/todo/<key>/update for update the specific task
# http://localhost:8000/todo/<key>/delete for delete the specific task