Select django version django 3.x or 2.x lts

[scwall]

Description

The possibility to choose between django version 2.x lts or version 3.x

Example :

Cloning into 'cookiecutter-django'...
remote: Counting objects: 550, done.
remote: Compressing objects: 100% (310/310), done.
remote: Total 550 (delta 283), reused 479 (delta 222)
Receiving objects: 100% (550/550), 127.66 KiB | 58 KiB/s, done.
Resolving deltas: 100% (283/283), done.
project_name [Project Name]: Reddit Clone
project_slug [reddit_clone]: reddit
author_name [Daniel Roy Greenfeld]: Daniel Greenfeld
email [you@example.com]: pydanny@gmail.com
description [Behold My Awesome Project!]: A reddit clone.
domain_name [example.com]: myreddit.com
version [0.1.0]: 0.0.1
timezone [UTC]: America/Los_Angeles
###################
Select django_version:
1 - 2.x lts
2 - 3.x
Choose from 1, 2,  [2]: 1
###################
use_whitenoise [n]: n
use_celery [n]: y
use_mailhog [n]: n
use_sentry [n]: y
use_pycharm [n]: y
windows [n]: n
use_docker [n]: n
use_heroku [n]: y
use_compressor [n]: y
Select postgresql_version:
1 - 11.3
2 - 10.8
3 - 9.6
4 - 9.5
5 - 9.4
Choose from 1, 2, 3, 4, 5 [1]: 1
Select js_task_runner:
1 - None
2 - Gulp
Choose from 1, 2 [1]: 1
Select cloud_provider:
1 - AWS
2 - GCP
3 - None
Choose from 1, 2, 3 [1]: 1
custom_bootstrap_compilation [n]: n
Select open_source_license:
1 - MIT
2 - BSD
3 - GPLv3
4 - Apache Software License 2.0
5 - Not open source
Choose from 1, 2, 3, 4, 5 [1]: 1
keep_local_envs_in_vcs [y]: y
debug[n]: n

Rationale

Version 2.x of django is a long term support version (2022), why not leave the possibility to choose between a version maintained for security and stability, maintainability or version 3.x. This also allows old applications that are not yet or will not be updated to continue running on new projects.

[browniebroke]

why not leave the possibility to choose between a version maintained for security and stability,

I'd say it's because of the maintenance overhead mainly. We already have a lot of moving parts in this template and maintinaing multiple versions of Django has historically been too much work. Arguabely, it might be easier to achive right now (because we just updated), but if we want to start using some Django 3.0 features now like ASGI, having Django 2 support somewhere would hold us back.

If you want to use a version supporting Django 2.2, you can checkout a specific tag using the --checkout option from the cookiecutter CLI:

cookiecutter https://github.com/pydanny/cookiecutter-django --checkout 2.2.6-01

As far as we're concerned, we aim to support a single version of Django.