djangosnippets: All snippets written in Python

Currency Widget

This is a simple TextInput widget that uses my [Currency object](http://www.djangosnippets.org/snippets/1525/). I placed my Currency object in the Django utils directory because I integrated a set of currency objects into the Admin app ( [here](http://www.djangosnippets.org/snippets/1529/) ) and it was just easier to have everything within Django. The rest of the series: [Currency Object](http://www.djangosnippets.org/snippets/1525/), [Currency Form Field](http://www.djangosnippets.org/snippets/1527/), [Currency DB Field](http://www.djangosnippets.org/snippets/1528/), [Admin Integration](http://www.djangosnippets.org/snippets/1529/)

internationalization
i18n
currency
babel
decimal

Sun 11 Jul 2010 Read More

Currency Object

This object stitches together the [Babel](http://babel.edgewall.org/) number formating and the Decimal object, with a little of my own hand rolled validation for parsing. Note the comment at the end of the code. It contains two lines to add to your settings.py. CURRENCY_LANGUAGE_CODE = 'pt_BR' CURRENCY_CODE = '' # If one exists like 'USD', 'EUR' UPDATE 06-03-2009: Now with rounding UPDATE 07-14-2009: Now with - More graceful handling of missing settings variables - Support for negatives (small oversight) - More flexible format strings - Thorough doctest tests UPDATE 07-30-2009: Added the parse_string argument to the `__new__()` method. This fixes a bug when importing data using `manage.py loaddata`. I have not yet updated the tests to reflect the change. The rest of the series: [Currency Widget](http://www.djangosnippets.org/snippets/1526/), [Currency Form Field](http://www.djangosnippets.org/snippets/1527/), [Currency DB Field](http://www.djangosnippets.org/snippets/1528/), [Admin Integration](http://www.djangosnippets.org/snippets/1529/)

internationalization
i18n
currency
babel
decimal

Sun 11 Jul 2010 Read More

limit view request rate decorator

Limit rate request decorator for view. Authenificated user can't request decorated view often then timeout. Usage: @limit_request_rate(time_beetween_request_sec) def my_view(request): ... get_cell_value from [here](http://code.activestate.com/recipes/439096/)

django
cache
view
decorator
limit-request-rate
closure
cell

Sun 11 Jul 2010 Read More

StaticField for non-changing text data in forms

This Field, Widget and the three lines of code in the form's clean method allow an easy (and hopefully general) way to add simple, unchangable text to a form. Example use: class OnlyTextForm(forms.ModelForm): points = StaticField(label=_('Points')) reviewer = StaticField(label=_('Reviewer')) def clean(self): for name, field in self.fields.items(): if isinstance(field, StaticField): self.cleaned_data.update({name: self.initial[name]}) return self.cleaned_data

forms
field
widget

Sun 11 Jul 2010 Read More

pavement file for deploying django projects

This is the pavement file I use to deploy a django site. It's in early stages. Right now it copies everything up to the desired server over scp. But I think I'll change it to rsync in the future. It requires pavement, and pexpect. The pavement file takes slight instruction from your settings.py file. For server information, and "lib_apps" to copy into the lib directory. An example of a settings file that I use with this pavement file: http://gitweb.codeendeavor.com/?p=django_empty.git;a=blob_plain;f=settings.py;h=23bda7d2a1eb2a52ca0859004ecccd206dade4ec;hb=5d672178dab282caeed5ff0de7ed807c72e44f74 Specifically, check out the bottom for two vars: "LIB_APPS" and "DEPLOYMENTS" A good example of my empty django project is here: http://gitweb.codeendeavor.com/?p=django_empty.git;a=tree;h=5d672178dab282caeed5ff0de7ed807c72e44f74;hb=5d672178dab282caeed5ff0de7ed807c72e44f74 I think the one thing that's missing is a way to re-spawn fcgi processes. Which I'll hopefully get around to adding sometime soon. Also, I need to do a little work at making sure source control files don't get pushed through scp.

django
python
deploy
paver
pavement

Sun 11 Jul 2010 Read More

HTML Hex Color Field

A custom form field than validates html hex color fields

fields
forms
color
hex

Sun 11 Jul 2010 Read More

range tag

Create a list containing an arithmetic progression that can be iterated through in templates. Emulate the [range](http://docs.python.org/library/functions.html#range) syntax. You can use either numbers or variables. Syntax: {% num_range [start] stop [step] as some_range %} {% for i in some_range %} ... do something {% endfor %} **About the author**: Take a look at [my website](http://www.marcofucci.com)

template
tag
django

Sun 11 Jul 2010 Read More

"an" filter

A template filter which returns "a" or "an" depending on the phonetic value of given text.

template-filter
grammar

Fri 24 Apr 2020 Read More

Absolute URL Templatetag

The {% url %} templatetag is awesome sometimes it is useful to get the full blown URL with the domain name - for instance for links in emails. The **{% absurl %}** templatetag mirrors the behaviour of {% url %} but inserts absolute URLs with the domain of the current Site object. Usage: {% absurl viewname %} >>> http://www.example.org/my/view/

url
templatetags
absolute
uri

Fri 24 May 2013 Read More

Link TemplateTag that checks for permissions and url address

This template tag was built to be used in web applications that are permission based. It renders the html for an html link tag if the user has permissions to access the view (if not, returns an empty string). It also checks if the current token is the active url address and, if so, adds class="active" to the html link for presentation purposes. Example usage: 1. {% url home as home_url %} {% get_link_if_allowed home_url "Home" %} 2. {% url project_dashboard project.id as project_dashboard_url %} {% get_link_if_allowed project_dashboard_url "Projects" %}

template
url
permissions
address

Sun 11 Jul 2010 Read More

Word-boundary-aware string truncation template filter

This is a custom template filter that allows you to truncate a string to a maximum of num characters, but respecting word boundaries. So, for example, if `string = "This is a test string."`, then `{{ string|truncatechars:12 }}` would give you "This is a..." instead of "This is a te".

template
filter
truncate
words

Sun 11 Jul 2010 Read More

Extend simplejson to understand closures, functors, generators and iterators

For most applications, simplejson.dumps() is enough. But I’m especially fond of iterators, generators, functors (objects with a `__call__()` method) and closures, dense components that express one thought well: the structure of a tree, or the rows of a database, to be sent to the browser. The routine dumps() doesn’t understand any of those things, but with a simple addition, you can plug them into your code and be on your way without headache. Dumps() just calls JSONEncoder(), and JSONEncoder has a routine for extending its functionality. The routine is to override a method named default() (why “default?” I have no idea) and add the object types and signatures you want to send to the browser. Normally, this exists for you to provide custom “object to JSON” handlers for your objects, but there’s nothing custom about iterators, generators, functors and closures. They are native Python objects. This snippet provides the functionality needed by JSONEncoder to correctly dereference these useful Python objects and render their contents. (Originally posted [here](http://www.elfsternberg.com/2009/05/20/fixing-an-omission-from-djangos-simplejson-iterators-generators-functors-and-closures/) )