awesome-cheatsheets/backend/django.py

121 lines
7.3 KiB
Python
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# *****************************************************************************
# CODING STYLE > MAKING YOUR CODE READABLE
# *****************************************************************************
# 1. Avoid abbreviating variable names.
# 2. Write out your function argument names.
# 3. Document your classes and methods.
# 4. Comment your code.
# 5. Refactor repeated lines of code into reusable functions or methods.
# 6. Keep functions and methods short. A good rule of thumb is that scrolling
# should not be necessary to read an entire function or method.
# TIP: Use Flake8 for Checking Code Quality.
# *****************************************************************************
# CODING STYLE > THE WORD ON IMPORTS
# *****************************************************************************
# Imports should be grouped in the following order:
# 1. Standard library imports.
# 2. Core Django imports.
# 3. Third-party app imports.
# 4. Imports from your apps.
# Use explicit relative imports.
# Avoid using import *
# *****************************************************************************
# CODING STYLE > OTHERS
# *****************************************************************************
# Use underscores in URL pattern names rather than dashes.
# *****************************************************************************
# CODING STYLE > DATABASE
# *****************************************************************************
# 1.Register your app in admin file in your app folder to use admin panel in django
# 2.Create a superuser using command python manage.py createsuperuser
# 3.Remember to migrate after you change anything in your models.py file
# 4.Use /admin/ page to add data in your tables for testing purpose
# *****************************************************************************
# Deployment
# *****************************************************************************
# add your media, database, venv, __pycache__ to the .gitignore (there is a compelete list that you can find here: https://github.com/jpadilla/django-project-template/blob/master/.gitignore)
# keep migration files in the git (you will need to migrate them in target server)
# don't run "makemigrations" in the target server (you will need to just run "migrate")
# $ pip freeze > requirements.txt
# make appropriate changes in your project settings.py file (change DEBUG to False and etc)
# push your code to your git-server
# pull your code in your target server
# give right permissions to the web-server (e.g. $ chown www-data:www-data -R /var/www/myproject)
# make a new venv in the target server and activate it
# $ sudo pip install -r requirements.txt
# sudo ./venv/bin/python3 manage.py migrate
# restart your web-server (in case of apache: $ sudo service apache2 restart)
# *****************************************************************************
# DJANGO-ADMIN
# *****************************************************************************
django-admin check # Checks the entire django project for potential problems
django-admin changepassword <username> # Allows changing a users password. It prompts you to enter a new password twice for the given user.
django-admin clearsessions # Can be run as a cron job or directly to clean out expired sessions.
django-admin collectstatic # Helps to collect all the static files in the one mentioned directory
django-admin createsuperuser # Creates a superuser account (a user who has all permissions).
django-admin compilemessages # Compiles .po files to .mo files for use with builtin gettext support
django-admin createcachetable # Creates the tables needed to use the SQL cache backend.
django-admin dbshell # Runs the command-line client for specified database, or the default database if none is provided.
django-admin diffsettings # Displays differences between the current settings.py and Django's default settings.
django-admin dumpdata # Output the contents of the database as a fixture of the given format (using each model's default manager unless --all is specified).
django-admin flush # Removes ALL DATA from the database, including data added during migrations. Does not achieve a "fresh install" state.
django-admin inspectdb # Introspects the database tables in the given database and outputs a Django model module.
django-admin loaddata # Installs the named fixture(s) in the database.
django-admin makemessages # Runs over the entire source tree of the current directory and pulls out all strings marked for translation. It creates (or updates) a message file in the conf/locale (in the django tree) or locale (for projects and applications) directory. You must run this command with one of either the --locale, --exclude, or --all options.
django-admin help # display usage information and a list of the commands provided by each application
django-admin makemigrations # create new migrations to the database based on the changes detected in the models
django-admin migrate # synchronize the database state with your current state project models and migrations
django-admin remove_stale_contenttypes # Deletes stale content types (from deleted models) in your database.y.
django-admin runserver <port> # start the development webserver at 127.0.0.1 with the port <port> default 8000
django-admin sendtestemail # Sends a test email to the email addresses specified as arguments.
django-admin shell # Runs a Python interactive interpreter. Tries to use IPython or bpython, if one of them is available. Any standard input is executed as code.
django-admin showmigrations # Shows all available migrations for the current project.
django-admin sqlflush # Returns a list of the SQL statements required to return all tables in the database to the state they were in just after they were installed.
django-admin sqlmigrate # Prints the SQL statements for the named migration.
django-admin sqlsequencereset # Prints the SQL statements for resetting sequences for the given app name(s).
django-admin squashmigrations # Squashes an existing set of migrations (from first until specified) into a single new one.
django-admin startapp <Appname> # create a new django application with the specified name
django-admin startproject <ProjectName> # create a new project directory structure
django-admin testserver # Runs a development server with data from the given fixture(s).
django-admin version # display the current django version
# *****************************************************************************
# Starting a django project in python3
# *****************************************************************************
# 1. $ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py; python3 get-pip.py
# 2. $ pip install virtualenv
# 3. $ mkdir django-projects
# 4. $ cd django-projects
# 5. $ virtualenv venv
# 6. $ source venv/bin/activate
# 7. $ pip install django
# 8. $ django-admin startproject myproject
# 9. $ django-admin startapp myapp
# 10. $ python manage.py runserver