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All snippets written in Python

2957 snippets

Snippet List

testshell

This commands runs a Python interactive interpreter with test database and data from the given fixture(s). It is usable if you want to play with test database. See also testserver docs

  • fixtures
  • shell
  • testshell
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Generic Permissions

A mixin to define permissions on models. This is more of an abstract model to subclass/customise than a plug-in solution. Explanations are [here](http://www.muhuk.com/2009/05/django-permission-system/).

  • models
  • model
  • permission
  • authorization
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inspectdb fixer

This snippet parses the output file of inspectdb and does some alterations. Mostly useful for people who regenerates models from constantly changing legacy databases. The snippet will: *Add quotes around foreign key classes, so the ordering is not significant *Append a related_name property to each foreign key with the value model class name + db_column name to evade collisions in reverse queries like: example.model: Reverse query name for field 'foreignkey' clashes with related field 'model2.foreignkey'. Add a related_name argument to the definition for 'foreignkey'. There's a slight performance degradation with using quotes class name instead of passing the class though.

  • models
  • inspectdb
  • database-import
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make templates fail loudly in dev

Add the line shown, or something similar, to your settings/dev.py, so that you can more clearly see when django is silently hiding errors in your template tags.

  • template
  • debugging
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Old MySQL Password Hash

A python implementation of the old MySQL PASSWORD() function. This is insecure. There is a reason MySQL changed this in version 4.1. Use it only if you have to!

  • mysql
  • password
  • hash
  • old
  • insecure
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Copy media files to central location for easier sharing

I was in need to have pluggable components that all have more or less some media files. I didn't want to pollute my config with dozens of media paths so I wrote this custom command that copies contents `<appdir>/app_media` to your `MEDIA_ROOT/<appname>` path. In template you will refer your media files like `{{MEDIA_URL}}/appname/<path to media>`

  • media
  • static
  • custom
  • command
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VAT field

VAT field with a field to select the country and a free field for the code

  • django
  • fields
  • forms
  • form
  • field
  • formfield
  • vat
  • tva
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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/) )

  • ajax
  • python
  • json
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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
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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
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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
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