django-common-helpers

Common things every Django project needs :-) It provides lot of helper functions, commonly used middlewares, context processors, custom email/auth backends, session helpers etc.

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=====================

django-common-helpers

Overview

Django-common consists of the following things:

- A middleware that makes sure your web-app runs either on or without 'www' in the domain.

- A ``SessionManagerBase`` base class, that helps in keeping your session related  code object-oriented and clean! See session.py for usage details.

- An ``EmailBackend`` for authenticating users based on their email, apart from username.

- Some custom db fields that you can use in your models including a ``UniqueHashField`` and ``RandomHashField``.

- Bunch of helpful functions in helper.py

- A ``render_form_field`` template tag that makes rendering form fields easy and DRY.

- A couple of dry response classes: ``JsonResponse`` and ``XMLResponse`` in the django_common.http that can be used in views that give json/xml responses.

Installation

  • Install django_common (ideally in your virtualenv!) using pip or simply getting a copy of the code and putting it in a directory in your codebase.

  • Add django_common to your Django settings INSTALLED_APPS::

    INSTALLED_APPS = [

      # ...
      "django_common",
    

    ]

  • Add the following to your settings.py with appropriate values:

    • IS_DEV
    • IS_PROD
    • DOMAIN_NAME
    • WWW_ROOT
  • Add common_settings to your Django settings TEMPLATE_CONTEXT_PROCESSORS::

    TEMPLATE_CONTEXT_PROCESSORS = [

    # ...
    'django_common.context_processors.common_settings',
    

    ]

  • Add EmailBackend to the Django settings AUTHENTICATION_BACKENDS::

    AUTHENTICATION_BACKENDS = ( 'django_common.auth_backends.EmailBackend', 'django.contrib.auth.backends.ModelBackend' )

  • Add WWWRedirectMiddleware if required to the list of middlewares::

    MIDDLEWARE_CLASSES = [

    # ...
    "WWWRedirectMiddleware",
    

    ]

  • Scaffolds / ajax_form.js (ajax forms) etc. require jQuery

Scaffolding feature

  1. Installing

To get scaffold just download scaffold branch of django-common, add it to INSTALLED_APPS and set up SCAFFOLD_APPS_DIR in settings.

Default is set to main app directory. However if you use django_base_project you must set up this to SCAFFOLD_APPS_DIR = 'apps/'.

  1. Run

To run scaffold type::

python manage.py scaffold APPNAME --model MODELNAME [fields]

APPNAME is app name. If app does not exists it will be created. MODELNAME is model name. Just enter model name that you want to create (for example: Blog, Topic, Post etc). It must be alphanumerical. Only one model per run is allowed!

[fields] - list of the model fields.

  1. Field types

Available fields::

char - CharField
text - TextField
int - IntegerFIeld
decimal -DecimalField
datetime - DateTimeField
foreign - ForeignKey

All fields requires name that is provided after : sign, for example::

char:title  text:body int:posts datetime:create_date

Two fields foreign and decimal requires additional parameters:

  • "foreign" as third argument takes foreignkey model, example::

    foreign:blog:Blog, foreign:post:Post, foreign:added_by:User

NOTICE: All foreign key models must alread exist in project. User and Group model are imported automatically.

  • decimal field requires two more arguments max_digits and decimal_places, example::

    decimal:total_cost:10:2

NOTICE: To all models scaffold automatically adds two fields: update_date and create_date.

  1. How it works?

Scaffold creates models, views (CRUD), forms, templates, admin, urls and basic tests (CRUD). Scaffold templates are using two blocks extending from base.html::

{% extends "base.html" %}
{% block page-title %} {% endblock %}
{% block conent %} {% endblock %}

So be sure you have your base.html set up properly.

Scaffolding example usage

Let's create very simple forum app. We need Forum, Topic and Post model.

  • Forum model

Forum model needs just one field name::

python manage.py scaffold forum --model Forum char:name
  • Topic model

Topics are created by site users so we need: created_by, title and Forum foreign key (update_date and create_date are always added to models)::

python manage.py scaffold forum --model Topic foreign:created_by:User char:title foreign:forum:Forum
  • Post model

Last one are Posts. Posts are related to Topics. Here we need: title, body, created_by and foreign key to Topic::

python manage.py scaffold forum --model Post char:title text:body foreign:created_by:User foreign:topic:Topic

All data should be in place!

Now you must add forum app to INSTALLED_APPS and include app in urls.py file by adding into urlpatterns::

urlpatterns = [
    ...
    url(r'^', include('forum.urls')),
]

Now syncdb new app and you are ready to go::

python manage.py syncdb

Run your server::

python manage.py runserver

And go to forum main page::

http://localhost:8000/forum/

All structure are in place. Now you can personalize models, templates and urls.

At the end you can test new app by runing test::

python manage.py test forum

Creating test database for alias 'default'...
.......
----------------------------------------------------------------------
Ran 7 tests in 0.884s

OK

Happy scaffolding!

Generation of SECRET_KEY

Sometimes you need to generate a new SECRET_KEY so now you can generate it using this command:

$ python manage.py generate_secret_key

Sample output:

$ python manage.py generate_secret_key

SECRET_KEY: 7,=_3t?n@'wV=p`ITIA6"CUgJReZf?s:`f~Jtl#2i=i^z%rCp-

Optional arguments

  1. --length - is the length of the key default=50
  2. --alphabet - is the alphabet to use to generate the key default=ascii letters + punctuation symbols

Django settings keys

  • DOMAIN_NAME - Domain name, "www.example.com"
  • WWW_ROOT - Root website url, "https://www.example.com/"
  • IS_DEV - Current environment is development environment
  • IS_PROD - Current environment is production environment

This open-source app is brought to you by Tivix, Inc. ( http://tivix.com/ )

Changelog

0.9.2

- Change for Django 2.X

0.9.1

- Change for Django 1.10 - render() must be called with a dict, not a Context

0.9.0

- Django 1.10 support
- README.txt invalid characters fix
- Add support for custom user model in EmailBackend
- Fixes for DB fields and management commands

0.8.0

- compatability code moved to compat.py
- ``generate_secret_key`` management command.
- Fix relating to https://code.djangoproject.com/ticket/17627, package name change.
- Pass form fields with HiddenInput widget through render_form_field
- string.format usage / other refactoring / more support for Python 3

0.7.0

- PEP8 codebase cleanup.
- Improved python3 support.
- Django 1.8 support.

0.6.4

- Added python3 support.

0.6.3

- Changed mimetype to content_type in class JsonReponse to reflect Django 1.7 deprecation.

0.6.2

- Django 1.7 compatability using simplejson as fallback

0.6.1

- Added support for attaching content to emails manually (without providing path to file).

- Added LoginRequiredMixin

0.6

- Added support for Django 1.5

- Added fixes in nested inlines

- Added support for a multi-select checkbox field template and radio button in render_form_field

- Added Test Email Backend for overwrite TO, CC and BCC fields in all outgoing emails

- Added Custom File Email Backend to save emails as file with custom extension

- Rewrote fragments to be Bootstrap-compatible

0.5.1

- root_path deprecated in Django 1.4+

0.5

- Added self.get_inline_instances() usages instead of self.inline_instances

- Changed minimum requirement to Django 1.4+ because of the above.

0.4

- Added nested inline templates, js and full ajax support. Now we can add/remove nested fields dynamically.

- JsonpResponse object for padded JSON

- User time tracking feature - how long the user has been on site, associated middleware etc.

- @anonymous_required decorator: for views that should not be accessed by a logged-in user.

- Added EncryptedTextField and EncryptedCharField

- Misc. bug fixes

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