django

1pip install django # Install Django Packages
2django-admin startproject project_name # Create a Project
3cd project_name
4python manage.py makemigrations # Create new migrations
5python manage.py migrate # Apply Migrations
6python manage.py createsuperuser # Create User for admin
7python manage.py runserver # Start Server
8
9python manage.py startapp sub_module # Create a sub app

1Django is a Python framework for web development.
2
3When creating simple static sites, there is no need to use backend frameworks.
4However, when creating complex and large sites that are backend heavy,
5you will want to use a backend framework. Currently, the 2 Python frameworks
6that are the most useful to learn are Flask and Django.
7
8Flask:
9Micro and light-weight framework that is easy to learn.
10
11Django:
12Complex, full-stack framework that is extremely powerful.
13
14For smaller projects, Flask will work. However, for large ones, you might
15consider learning Django. I suggest you learn Flask first and then Django.
16
17Additionally, considering learning Node JS because even though it is in
18Javascript, it is extremely popular.

1use spring
2

1pip install Django==3.2.2

1duplicate key value violates unique constraint "loan_loanapplication_pkey"
2DETAIL:  Key (id)=(1) already exists.
3

1Django is a web development platform in python programming language.

1not enough arguments for format string

1pip install Django==3.1.5

1Read the docs, its the best you will ever get.

1pip install Django==3.1.4