Django: A tool for website creation

Intro book

https://simpleisbetterthancomplex.com/series/2017/09/04/a-complete-beginners-guide-to-django-part-1.html

Steps

• • Install Django package (pip3 install django)

  • Create project (website here)

Important files

manage.py -> System file (never edit)

settings.py

• Contains all configuration related to website

• Contains lists of preinstalled apps

• Contains databases info (sqlite by default)

• LOGIN_URL, LOGIN_REDIRECT_URL are useful variables (Ref: https://docs.djangoproject.com/en/3.0/ref/settings/)

urls.py -> Tells about how to respond for a url (perform a action)

Important commands

For creating project

django-admin startproject <projectname>

For running server

• python manage.py runserver -> It will start web server on localhost

• python manage.py runserver 0.0.0.0:8000 -> It will start web server on all interfaces

For DB changes

• python manage.py makemigrations music

  • • update DB table for app music

You can view DB table as below screenshot

• python manage.py migrate -> It syncs up with all databases

python manage.py migrate

(venvdjango) (base) Deepaks-MacBook-Air:website deepak$ python manage.py migrate

Operations to perform:

Apply all migrations: admin, auth, contenttypes, sessions

Running migrations:

Applying contenttypes.0001_initial... OK

Applying auth.0001_initial... OK

Applying admin.0001_initial... OK

Applying admin.0002_logentry_remove_auto_add... OK

Applying admin.0003_logentry_add_action_flag_choices... OK

Applying contenttypes.0002_remove_content_type_name... OK

Applying auth.0002_alter_permission_name_max_length... OK

Applying auth.0003_alter_user_email_max_length... OK

Applying auth.0004_alter_user_username_opts... OK

Applying auth.0005_alter_user_last_login_null... OK

Applying auth.0006_require_contenttypes_0002... OK

Applying auth.0007_alter_validators_add_error_messages... OK

Applying auth.0008_alter_user_username_max_length... OK

Applying auth.0009_alter_user_last_name_max_length... OK

Applying auth.0010_alter_group_name_max_length... OK

Applying auth.0011_update_proxy_permissions... OK

Applying sessions.0001_initial... OK

(venvdjango) (base) Deepaks-MacBook-Air:website deepak$

For creating app

python manage.py startapp <name>

It will create a module with given name (music here)

migrations -> For Database activity

admin.py -> Admin related code (delete user for example)

apps.py -> Apps configuration/setting

models.py -> blueprint for Database. Tells how to store data for this app

test.py -> Testing related file

views.py -> Take user request and return webpage

For user creation

After below steps, user can login via http://localhost:8000/admin/

python manage.py createsuperuser

When you access localhost:8000/admin, then you can use this credential to login.

Default page after login

Page after registering album to admin

Custom page to register a user

https://simpleisbetterthancomplex.com/tutorial/2017/02/18/how-to-create-user-sign-up-view.html

https://learndjango.com/tutorials/django-signup-tutorial

https://www.youtube.com/watch?v=3UEY0ZIQ9dU

Login user form

https://www.youtube.com/watch?v=8V-mscw6H64

User logout

https://www.youtube.com/watch?v=MCos1BBKfO8

Password reset

https://learndjango.com/tutorials/django-password-reset-tutorial

For checking mail using test mail server, refer https://blog.mailtrap.io/django-send-email/#SMTP_email_backend

For sending mail using gmail SMTP server, refer here

Extended user profile

https://stackoverflow.com/questions/44509497/how-do-i-allow-the-editing-of-my-extended-userprofile-with-userchangeform-django

https://www.youtube.com/watch?time_continue=54&v=Tja4I_rgspI&feature=emb_logo

https://blog.khophi.co/extending-django-user-model-userprofile-like-a-pro/

Update extended user profile

https://simpleisbetterthancomplex.com/tutorial/2016/07/22/how-to-extend-django-user-model.html

Auth management

Login required for all users

Refer: https://pypi.org/project/django-login-required-middleware/

Hands-on for creating website via Django framework

https://docs.docker.com/compose/django/#more-compose-documentation

User notification

Display success Messages

https://stackoverflow.com/questions/28723266/django-display-message-after-post-form-submit

Terminology

App -> Your Django website has many apps inside as per your need

Form management

Create normal form

Please refer https://www.agiliq.com/blog/2019/01/django-createview/

Create choice field

https://www.geeksforgeeks.org/how-to-use-django-field-choices/

Website design

Refer https://simpleisbetterthancomplex.com/series/2017/09/11/a-complete-beginners-guide-to-django-part-2.html

Activity streaming

https://django-activity-stream.readthedocs.io/en/latest/configuration.html

https://github.com/narenaryan/django-activity-stream-tutorial

https://django-activity-stream.readthedocs.io/en/latest/installation.html

For issues-https://stackoverflow.com/questions/35388637/runtimeerror-model-class-django-contrib-sites-models-site-doesnt-declare-an-ex

Like Facebook timeline

https://www.youtube.com/watch?v=R_tyN8bNe4A

Debugging

Reset Sqlite DB

python manage.py flush

Ref: https://stackoverflow.com/questions/7907456/emptying-the-database-through-djangos-manage-py

VScode (Visual Studio IDE) for Django development

• • Install vscode (Refer: https://visualstudio.microsoft.com/downloads/)

  • Check and install python extension via Extension tab in vscode

• • Install Django extension via Extension tab in vscode

• • Create python virtual environment via debug console

refer python3 -m env <env name> in below screenshot. You will get a pop-up. Tell yes to use this environment.

Ref: https://www.roelpeters.be/change-venv-for-python-in-vs-code/

Ref: https://code.visualstudio.com/docs/python/tutorial-django

• • Install Django package in this virtual environment

• • Using debug tab, click start. It will start server

• • Goto browser in same machine and then you can check server if you have page

  • To debug, put breakpoint at needed line and execute the website

Refer below screenshot for example

Ref: https://docs.microsoft.com/en-us/visualstudio/python/debugging-python-in-visual-studio?view=vs-2019

Django decorators

from django.contrib.admin.views.decorators import staff_member_required

from jsonview.decorators import json_view

Including HTML with the argument

https://github.com/pallets/jinja/issues/241

Django shell

Refer here

Django test

use 'python manage.py test --verbosity=2' for printing the log

python manage.py test --verbosity=2

System check identified no issues (0 silenced).

test_home_url_resolves_home_view (boards.tests.HomeTests) ... return value is home

ok

test_home_view_status_code (boards.tests.HomeTests) ... ok

----------------------------------------------------------------------

Ran 2 tests in 0.033s

OK

Destroying test database for alias 'default' ('file:memorydb_default?mode=memory&cache=shared')...

(env) Deepaks-MacBook-Air:alumnisystem deepak$

Django community resources

Django site example with source code

https://www.djangosites.org/with-source/

Reference

https://www.youtube.com/results?search_query=Django+Tutorial+for+Beginners+-+31

https://www.youtube.com/watch?v=CHjXtRrhqxc

https://www.quora.com/How-do-I-set-up-a-website-with-user-accounts-registration-and-login-I-have-developed-a-website-with-HTML5-and-CSS3

https://www.quora.com/Should-I-learn-Flask-or-Django-Im-a-beginner-and-Im-looking-for-simplicity-and-ease-of-learning