roman numbers template filter
dirt and simple template filter to convert a number to its roman value. taken from dive into python http://www.diveintopython.org/unit_testing/stage_5.html
- template
- filter
- filters
- roman
- numbers
Snippet List
Currency Fields with newforms
The newforms package allows you to simply add new field types to your forms. This snippet shows the addition of a new type of field, to make sure the user enters sensible currency values (either with no decimal, or two-decimal places), and a custom widget to make sure that the value is displayed correctly when the user sees the form. The CurrencyInput widget simply tries to display the current value in floating point 2-decimal places format (and gives up if it can't). The CurrencyField makes sure that the input value matches a regular expression, and when it is asked to clean the value it converts it to a float. The regex here limits the amount to 99,999.99 or less. This is within the bounds of accuracy of python's float value. If you want to use truly huge values for the amount, then you'll face problems with the floating point not being able to represent the values you enter, and so the conversion to floating point in the field will fail. In this case it would be better to use python longs, and used a fixed point interpretation.
- newforms
- validation
- currency
- form
- widgets
Import mail into a Django model
A mildly crufty script to slurp mail from an mbox into a Django model. I use a variant of this script to pull the contents of my scammy-spam mbox into the database displayed at <http://purportal.com/spam/>
- faceless
- utility
use oldforms validators in newforms forms
Using the `run_oldforms_validators` function, you can run oldforms validators in your newforms `clean_XXX` methods. Usage example: class PasswordForm(forms.Form): password = forms.CharField(widget=forms.PasswordInput()) def clean_password(self): validator_list = [ isStrongPassword, isValidLength, SomeValidators( num_required=3, validator_list=[hasLower, hasUpper, hasNumeric, hasSpecial], error_message="Password must contain at least 3 of: lowercase, uppercase, numeric, and/or special characters." ) ] run_oldforms_validators('password', self, validator_list) return self.clean_data['password'] Above, `isStrongPassword`, `isValidLength`, etc. are oldforms validators. If you are interested in seeing the implementation of `isStrongPassword`, please see my [Using CrackLib to require stronger passwords](http://gdub.wordpress.com/2006/08/26/using-cracklib-to-require-stronger-passwords/) blog post.
- newforms
- validators
- oldforms
MediaWiki Markup
This is a copy paste job of mediawiki's syntax parser built in Python. You'll probably have to edit it to fit your needs MediaWiki-style markup parse(text) -- returns safe-html from wiki markup code based off of mediawiki
- markup
- mediawiki
Captcha Middleware (Template)
A middleware we are using to stop "spam" on Curse. It makes the user fill in a captcha box whenever they submit a form unless a cookie is set (which expires by default after 6 hours) See also [the python script](http://www.djangosnippets.org/snippets/127/)
- captcha
- anti-spam
Django Using Stored Procedure
Here is an clean example of using stored procedure using django. It sounds pretty weird "stored procedures in django" but for legacy database system we still need a clean approach to implement stored procedures using django. In this example, I've implemented logic inside models.py by creating a dummy class, i.e a django table (which is comparable to package in your database) and inside this package/class i added stored procedure wrappers. I tested it with boulder-oracle-sprint branch, there is minor issues with LazyDate in db/backend/oracle/base.py but it still working after minor edits in base.py. It worked absolutely fine with MySQL and MSSQL. View is pretty straight forward. Dont forget to create form.html as template and in body just put {{ form }}
- django
- stored
- procedures
- oracle
- mysql
Use dateutil's relativedelta to sort an arbitrary list of Django objects by date
Sometimes you'll have a list of ORM objects that aren't in a QuerySet, but you still want to sort them by date. For instance, you have a list of shows with a date_time attribute. Maybe you used a list comprehension to filter them...who knows. Regardless, you have a list (not a QuerySet) of Django objects.
- date
- dateutil
- sort
SQL Log Middleware
This middleware will add a log of the SQL queries executed at the bottom of every page. You can (should) use BeautifulSoup to place this in a specific location. Note: If you serve non-html content, it would be wise to do a mimetype check.
- sql
- middleware
- log
Selectively change fields, widgets or labels in forms created from models
Allows you to override form fields created by form_for_model or form_for_instance, without having to redefine whole fields for example in form.base_fields.
- newforms
- forms
Function to create resized versions of an image from a URL and saving it to a local path
This is a really useful function I used to create the resized preview images you can see on the [homepage of my site](http://www.obeattie.com/). Basically, it takes the original URL of an image on the internet, creates a resized version of that image by fitting it into the constraints specified (doesn't distort the image), and saves it to the MEDIA_ROOT with the filename you specify. For example, I use this by passing it the URL of a Flickr Image and letting it resize it to the required size, and then saving it to a local path. It then returns the local path to the image, should you need it. I however just construct a relative URL from the image_name and save that to the database. This way, it's easy to display this image. Hope it's useful!
- image
- pil
- thumbnail
- resize
ForeignKey dropdown selector
Most of the time when you want a dropdown selector based on a ForeignKey, you'll want to use [snippet #26](http://www.djangosnippets.org/snippets/26/) Here's an alternative approach, perhaps useful when you want to define choices once and reuse it in different views without overriding Form `__init__`.
- dynamic
- foreignkey
- dropdown
- choices
- property
Using the built-in slugify filter outside a template
This is just a very short (and mostly useless on it's own) example of how the built in slugify filter can be used in a Python script to generate slugs. It was pulled from a script I've written to pull in items from Upcoming.org's API. I post it because "sunturi" posted [Snippet #29](http://www.djangosnippets.org/snippets/29/), which duplicates the functionality of the built-in slugify filter. In the comments of that snippet, santuri (and others) seem to believe that template filters can only be used within templates. This is incorrect, and I think it's important people understand they can be used elsewhere. sunturi's snippet does remove prepositions from values before slugifying them, so if you need that, his code will work work. But if all you need is slugification, the built-in slugify filter will work fine -- in a Python script, as well as in a template.
- template
- filter
- django
- slug
- built-in
Get the full request path
The result maybe: http://localhost/test/ And for request.path, it will not include the domain field(http://localhost).
- request-path
assign fields dynamically in newforms
DynamicFieldSnippetForm demonstrates how to dynamically assign fields in newforms. 1. weight is a required static field 2. height is an optional dynamic field This example uses `request_height` as an optional keyword argument to declare whether the `height` field should be added to the form, but it's just there for demonstration purposes. If you decide to use a keyword argument in your code, be sure to pop it off (as demonstrated in the code) or you'll get an *unexpected keyword argument* error.
- newforms
- dynamic
- fields
3110 snippets posted so far.