Roy Tutorials

In your application or project there is always a requirement for uploading a file data. This file data could be in a specific format depending on your requirement. Here I am going to explain you how you can upload single or multiple files in your python based Django framework. I am assuming you have a basic knowledge on Python and…

You are not going to always return records from MongoDB but sometimes you need to perform some computations such as sum, count, average, etc. Here you need the aggregation operations which are used to process data that return the computed results. Therefore aggregation actually groups data from multiple documents and performs a variety of operations on the grouped data to…

You may not want to fetch a whole bunch of data from the document which is stored in a collection in your MongoDB database. You can restrict the number of records or data using different conditions with the help of WHERE, AND, OR and IN operators, but what if you want to restrict the data you want in your particular…

MongoDB is one of the most popular NoSQL database where data are stored in the form of documents. You can also create tables in traditional way to put your structured data but the main purpose is to store unstructured data in the form of object which may vary based on a particular requirement. Now when you select data from collection,…

MongoDB is one of the most popular NoSQL database where your data are stored in a collection. To quickly access your data from MongoDB you can execute commands on MongoDB shell and your results appear based on the given criteria. One of the commands is find() function and using this command you can easily retrieve data from MongoDB collection. When…

Table of Contents Introduction Why do you need to pretty print JSON data? Prerequisites pretty Print JSON Using Jackson Library Using Google GSON Library Using JSON Library Source Code Introduction Here I am going to show you how to pretty print JSON in Java. I am going to use here JSON, Jackson and Google Gson libraries to prettify the JSON…

JSON File JSON, i.e., JavaScript Object Notation is a lightweight format for interchanging data. It is based on a subset of JavaScript language. For example, this JSON data format is used in the webservice response. In old days webservices used XML for the primary data format but nowadays JSON, being lightweight, is becoming the preferred data format for exchanging data…

Introduction Here I am going to show you how to merge two separate branches into one using tortoise git client. Generally you or development team need to maintain separate line of development in different branches. So at some later point of time you need to merge your changes into another branch. Merge Branches Your team may manage different branches, such…

Introduction Here I will discuss on how to clone and create branch using tortoise git client. I assume here that a master branch already exists in the remote git repository. I will show you here how to clone the master repository in your local system using git client. You can also use the command line tool to clone the remote…

Dockerize Django MySQL App In this tutorial I will show you how to dockerize Django MySQL app using docker compose in Linux environment. So why do you need docker compose when you have docker container? Generally it is said to be best practices when each docker container runs a process with single responsibility, but for this application you need two…