Custom Model Manager Chaining
Using Python mixins, you can chain methods on your queryset.
- orm
- manager
- queryset
Snippet List
SearchableManager
A drop-in chainable manager for providing models with basic search features such as +/- modifiers, quoted exact phrases and ordering by relevance.
- search
- model
- manager
- queryset
Sign a string using SHA1, then shrink it using url-safe base65
Sometimes it's useful to sign data to ensure the user does not tamper with it - for example, cookies or hidden form variables. SHA1 is cryptographically secure but weighs in at 40 characters, which is pretty long if you're going to be passing the data around in a URL or a cookie. These functions knock an SHA1 hash down to just 27 characters, thanks to a base65 encoding that only uses URL-safe characters (defined as characters which are unmodified by Python's urllib.urlencode function). This compressed hash can then be passed around in cookies or URLs, and uncompressed again when the signature needs to be checked. UPDATE: You probably shouldn't use this; see [http://fi.am/entry/urlsafe-base64-encodingdecoding-in-two-lines/](http://fi.am/entry/urlsafe-base64-encodingdecoding-in-two-lines/) for a smarter approach based on Python's built-in base64 module.
- security
- base65
- signing
- cookies
- hashlib
- hashes
- sha1
Another Memcache Status View
This was inspired by [this memcache status snippet](http://www.djangosnippets.org/snippets/54/) However, this version uses the quasi-internal cache._cache.get_status(), and it compiles a list of stats for each server that you specify in your CACHE_BACKEND setting.
- memcache
newforms and ModelForm
I noticed that form_for_* in newforms now carry deprecation warnings. This code is a minimal demonstration of how to use ModelForm as a replacement. Full information can be found on [Stereoplex](http://www.stereoplex.com/two-voices/django-modelform-and-newforms). Hope this helps you.
- newforms
- form_for_instance
- modelclass
- form_for_class
- deprecated
Search in a model spanning relations
By popular demand an example of search in models that spans more realtions. Keep a list of Q, filter the None away, feed the rest to .filter() Credit goes to Carlo C8E Miron for the idea... cheers buddy! ;)
- search
Form row filter
I love newforms. But sometimes using ``{{ form }}`` within a template doesn't give you enough flexibility. The other option, manually defining the markup for each field, is tedious, boring and error-prone. This is an example of how you can use a template filter to get the best of both worlds. Use it like this to render an entire form: ``{% for field in form %}`` {{ field|form_row }} ``{% endfor %}`` Or use it on a per-field basis: ``<fieldset>`` {{ form.first_name|form_row }} {{ form.last_name|form_row }} ``</fieldset>``
- newforms
- forms
- templates
- filters
template + cache = crazy delicious
A couple of utility `Node` subclasses that will automatically cache thier contents. Use `CachedNode` for template tags that output content into the template: class SomeNode(CachedNode): def get_cache_key(self, context): return "some-cache-key" def get_content(self, context): return expensive_operation() Use `CachedContextUpdatingNode` for tags that update the context: class AnotherNode(CachedContextUpdatingNode): # Only cache for 60 seconds cache_timeout = 60 def get_cache_key(self, context); return "some-other-cache-key" def get_content(self, context): return {"key" : expensive_operation()}
- tag
- templatetag
- cache
Simple Syslog Logging Class with Decorator
Simple logging decorator. Logs the function name along with the message. `Jul 14 16:10:42 mtzion test_func: 1 two` Define SYSLOG_FACILITY in settings.py. import syslog SYSLOG_FACILITY = syslog.LOG_LOCAL1
- decorator
- logging
- syslog
TestCase base class to easily temporarily change module values
1. Base your test case off `ModuleTestCase` and set a class attribute containing a dictionary of modules which you want to be able to revert the values of. 2. Use `self.modulename.attribute = something` in your `setUp` method or test cases to change the module's attribute values. 3. The values will be automatically restored when each test case finishes. For the common case of reverting the settings module, just use the `SettingsTestCase` as your base class.
- tests
(en-US) Humanized Decimal Field
Simple DecimalField class extension that automatically adds formatting and validation for comma-separated "decimals". Works wonderfully for price fields. Could be extended to strip dollar signs or to be locale-agnostic.
- form
- humanize
- field
- comma
- decimal
- thousands
- separator
- input
django-techblog fields.py for use with postgresql
This snippet applies the improved pickledobject snippet http://djangosnippets.org/snippets/1694/ to django-techblog's "fields.py" file. Necessary for using postgresql/psycopg2.
Template filter to turn Twitter names into links
Quick and simple twitterize filter to turn Twitter usernames into profile links on your own sites. Add the filter code to your own template tags (http://docs.djangoproject.com/en/dev/howto/custom-template-tags/).
- twtterize
Partial Tag
Lets you include another template and pass in named variables. Use like: {% partial field_template field=form.city %} If no key is specified, it will use "item" instead. You may pass in multiple variables as comma-separated key=value pairs.
- context
- partial
- include
- ssi
Fetching top items
This is a method from the custom manager for the Snippet model used on this site; the basic idea is to be able to ask for the top `n` "foo", where "foo" is something related to Snippet. For example, you can use `top_items('tag')` to get the top Tags ordered by how many Snippets are associated with them. I have a feeling that I could get this down to one query, but haven't yet put in the time for it.
- snippets
- sql
- managers
- group-by