Learn Django

How to Install Dependencies

We can install dependencies using conda or build docker

• Using Conda

  1. Create conda environment:

     conda env create -f environment.yml
     conda activate python39-poetry-env
     

  2. Create python environment:

     python -m venv .venv
     .venv/Scripts/Activate.ps1
     

  3. Install Depencies using Poetry

     poetry install
     

• Using docker

  1. Dev

     Using Docker Compose

     docker compose -f docker-compose.dev.yml up -d
     

  2. Production

     • Using Docker Image

       1. Buld Docker Image

       docker build --tag learn-django-docker .
       

       2. Run Docker Container

       docker run --rm --detach --publish 0.0.0.0:8000:8000 --name learn-django-server learn-django-docker
       

     • Using Docker Compose

       Run Docker Compose:

       docker compose -f docker-compose.yml up -d --build
       

Create a project

To create django project:

django-admin startproject mysite

Create django app

To create django app:

python manage.py startapp polls

How to Define Model

The three-step guide to making model changes:

1. Change your models (in models.py).
2. Run python manage.py makemigrations to create migrations for those changes
3. Run python manage.py migrate to apply those changes to the database.

A model is the single, definitive source of information about your data. It contains the essential fields and behaviors of the data you’re storing. Django follows the DRY Principle. The goal is to define your data model in one place and automatically derive things from it.

How to migrate database

To migrate database:

python manage.py migrate

To make new migration:

python manage.py makemigrations polls

To see SQL that used to migrate:

python manage.py sqlmigrate polls 0001

How to run program

To run program:

python manage.py runserver

How to start Python interactive shell

To start a new Python interactive shell:

python manage.py shell 

How to create an admin user

To create an admin user:

> python manage.py createsuperuser

> Username: admin

> Email address: admin@example.com

> Password: **********
  Password (again): *********

Views on Django

A view is a “type” of web page in your Django application that generally serves a specific function and has a specific template.