Everything about Django Models and ORM

In this blog we are going to learn about the Django Models and ORM.

Introduction to Django Models.

• A model in django project is a file where are the database related work is done.

• Django models have features to create database tables, define there datatypes, and other proporties like relationships, validations, proporties.

• Django models reduces the development time of creation and management of databases by converting database tables into python classes.

• Django uses orm(object relational mappers) which is a pythonic way of writing sql queries.

Example of a sample Django Models

from django.db import models

class Person(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)

Advantages of Using Django Models

• Easy to Use.

• Converts complex sql queries into simple classes.

• Management of Tables becomes easy as everything is arranged in the classes. 

• Making changes and updation of table becomes easy using migration functionality.

• Has a very good support to manage relationship like One-To-One, Many-To-Many, One-To-Many. It also has features to manage Primary keys and Foriegn Keys.

Supported Databases in Django

• PostgreSQL

• MariaDB

• MySQL

• Oracle

• SQLite

other than these, django also have support for other databases like sql server, mongo db etc. using third party libraries.

How to build first Django Models?

• To start creating your first django model you need to open models.py files inside your django application.
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