django-misc 0.1.0

Django miscellaneous - module with different useful stuff for django. Here you'll find: - couple decorators, like render_to and receive; - json_encode module for simplify work with json; - some usefull templatetags, like set, filter, get etc; some additional utilities; - bbcode template tags; - template tags that provide like and share for social sevices.

django-misc

Django misc is module with set of utilities, decorators, templatetags that everybody uses at least once in project. So here they all in one application, that will grow to aggregate all usefull utilities for Django.

Contents

• django-misc

• Quick overview

• Requirements

• Installation

• Setup

• Use django-misc

  • Template tags

    • {% load html_tags %}

    • {% load misc_tags %}

  • json_encode

    • JSONTemplateResponse

    • json_encode

    • json_response

    • json_template

  • Context processors

  • Views utils

    • server_error

    • decorator to_template or render_to

    • HttpResponseReload

    • str_to_class

    • get_alphabets

  • Management utils

    • handle_lock

    • sync_site

  • HTML utils

    • clear_html_code

    • generator

• Contributing

• License

Quick overview

Here you’ll find:

• Couple decorators, like render_to and receive

• Json_encode module for simplify work with json

• Some usefull templatetags, like set, filter, get etc

• Some additional utilities

• Bbcode template tags

• Template tags that provide like and share for social sevices

Requirements

• python >= 2.5

• pip >= 0.8

• django >= 1.2

Optional (for html clearing and bbcodes):

• BeautifulSoup

• git+git://github.com/frol/postmarkup.git

Installation

Django misc should be installed using pip:

pip install git+git://github.com/ilblackdragon/django-misc.git

or for stable version:

pip install django-misc

Setup

• Add ‘misc’ to INSTALLED_APPS

  INSTALLED_APPS += ( 'misc', )

• If you want to use the html clearer

  pip install BeautifulSoup

• If you want to use bbcodes

  pip install git+git://github.com/frol/postmarkup.git

Use django-misc

Template tags

{% load html_tags %}

{% remove_tags <text> %}

Removes html tags and replace <br/> by n

{% load misc_tags %}

{{ text|cutafter:"<length>" }}

Cut text after <length> characters and, if necessary, add tree dots (…) to the end

{% get_range <length> %}

Return simple python range(<length>) list

{% get_element <dict> <key1> [<key2>] %}

Return a dict value by key1 and, if specified, key2 (i.e. dict[key1][key2])

json_encode

JSONTemplateResponse

It works like TemplateResponse, but return JSON response

in view.py:

...
return JSONTemplateResponse(request, template_name, template_context, data={'status': 'ok', 'user': request.user})

This line will create response

{
    "status": "ok",
    "user": {
        "username": "frol",
        "first_name": "",
        "last_name": "",
        "is_active": true,
        "email": "[e-mail]",
        "is_superuser": true,
        "is_staff": true,
        "last_login": "2012-01-24 18:59:55",
        "password": "sha1$fffff$1b4d68b3731ec29a797d61658c716e2400000000",
        "id": 1,
        "date_joined": "2011-07-09 05:57:21"
    },
    "html": "<rendered HTML>"
}

WARNING: Be carefull with serialization of model objects. As you can see in example, password hash has been serialized.

json_encode

json_encode(data)

Serialize python object into JSON string.

The main issues with django’s default json serializer is that properties that had been added to an object dynamically are being ignored (and it also has problems with some models).

json_response

json_response(data)

Serialize python object into JSON string and return HttpResponse with correct content_type (application/json)

json_template

json_template(data, template_name, template_context)

Render template, add it for serialization data, serialize data into JSON string and return HttpResponse with correct content_type.

Context processors

useful_constants

If you want use True, False, None in django templates, add line to TEMPLATE_CONTEXT_PROCESSORS in settings.py:

'misc.context_processors.useful_constants',

Example, A = True, B = False, C = None, D - undefined:

{% if A == True %}A is True{% endif %}
{% if A == False %}A is False{% endif %}
{% if A == None %}A is None{% endif %}

{% if B == True %}B is True{% endif %}
{% if B == False %}B is False{% endif %}
{% if B == None %}B is None{% endif %}

{% if C == True %}C is True{% endif %}
{% if C == False %}C is False{% endif %}
{% if C == None %}C is None{% endif %}

{% if D == True %}D is True{% endif %}
{% if D == False %}D is False{% endif %}
{% if D == None %}D is None{% endif %}

Will produce output:

A is True
B is False
C is None
D is None

Views utils

server_error

misc.views.server_error(request)

Put server_error as your handler500 in urls.py and add templates/errors/500.html

handler500 = 'misc.views.server_error'

decorator to_template or render_to

to_template(template_name=None)

Decorator to simply call direct_to_template:

@to_template("test.html")
def test(request):
    return {'test': 100}

@to_template
def test2(request):
    return {'test': 100, 'TEMPLATE': 'test.html'}

@to_template
def test2(request, template_name='test.html'):
    return {'test': 100, 'TEMPLATE': template_name}

HttpResponseReload

utils.HttpResponseReload(request)

Reload current page.

def simple_view(request, form_class=CommentForm, template_name='some_template.html'):
    form = CommentForm(request.POST or None)
    if form.valid():
        form.save()
        return HttpResponseReload(request)
    return render(template_name, {'form': form})

str_to_class

utils.str_to_class(class_name)

Returns a class based on class name

get_alphabets

utils.get_alphabets()

Returns pair of english and russian alphabets. Useful for creating filters.

Management utils

handle_lock

management.handle_lock(handle)

Decorate the handle method with a file lock to ensure there is only ever one process running at any one time.

sync_site

sync_site is post syncdb event, that will sync current Site object with settings like SITE_NAME and SITE_DOMAIN

HTML utils

clear_html_code

html.clear.clear_html_code(text)

Clean up HTML code from tags that are not allowed. Structure of allowed tags can be found at needs.cfg. clear.py is generated by html/generator.py with needs.cfg as config file

generator

./generator.py

Will generate clear.py source code file, according to rules specified at needs.cfg. Example of simpler configuration file can be found in example.cfg

Contributing

Development of django-misc happens at github: https://github.com/ilblackdragon/django-misc

License

Copyright (C) 2009-2013 Illia Polosukhin, Vladyslav Frolov This program is licensed under the MIT License (see LICENSE)