Hyperlink read-only ForeignKey objects in admin to their change pages
If you set a ForeignKey field in the admin to read-only, you can use this snippet to automatically create a hyperlink to that object.
- admin
Snippet List
Class-based process form view.
Class based view returns json serialized saved data or form errors.
- process_view
- class-based-views
Updated: GeoJSON Serializer for GeoDjango (gis)
Unfortunately the built in Django JSON serialzer encodes GeoDjango GeometyrField as WKT text. This snippet extends django's serializer and adds support for GEOJson format. Built in JSON serializer output: [{"pk": 1, ... "geopoint": "POINT (-76.5060419999999937 44.2337040000000030)" ... }] GeoJSON serializer ouput: [{"pk": 1, ... "geopoint": {"type": "Point", "coordinates": [-76.503296000000006, 44.230956999999997], "__GEOSGeometry__": [ "__init__", [ "SRID=4326;POINT (-75.5129950000000036 44.2442360000000008)" ] ] }] Note: the "__GEOSGeometry__" is a class hint as defined by JSON-RCP and used during deserilization.
- GeoJson
- Serializer
- Deserializer
Get Client IP Behind Proxy
If your application server is behind a proxy, `request.META["REMOTE_ADDR"]` will likely return the proxy server's IP, not the client's IP. The proxy server will usually provide the client's IP in the `HTTP_X_FORWARDED_FOR` header. This util function checks both headers. I use it behind Amazon's Elastic Load Balancer (ELB).
- request
- ip
Filter by taggit tags in the admin
A FilterSpec that can be used to filter by taggit tags in the admin. To use, simply import this module (for example in `models.py`), and add the name of your TaggableManager field in the list_filter attribute of your ModelAdmin class.
- filter
- admin
- taggit
User groups template tag
This snippet is an improved version of the [ifusergroup](http://djangosnippets.org/snippets/1576/) tag that allows spaces in any of the group names. It also fixes a small bug where if a group didn't exist none of the subsequent groups would be checked.
- tag
- templatetag
- user
- auth
- group
- permissions
- access-control
easy signal registration
Django signals can live anywhere you like. I like them in *app/signals.py* file. This snippet imports signal modules from all installed apps.
- registration
- signal
Adding Fields to Registration Form [or Multiple Inheritance of forms]
A simple way to add fields to an existing form, demonstrated using `django-registration`.
- forms
- django-registration
- multiple-inheritance
Math Captcha Field and Widget
This math captcha field and widget was inspired by Justin Quick's django-math-captcha, but I wanted to make it into one form field and not have anything in settings.py. I removed the division and modulo operators to avoid people having to input fractions, and just randomly select the operator. It leverages Django's built-in MultiValueField to set up the hidden hashed answer to compare the user's input to instead of rendering strings for the fields like django-math-captcha does. Unit tests soon to follow, but this is used in production at: http://btaylorweb.com/. Enjoy!
- simple
- captcha
- field
- widget
- math
- multiwidget
- multifield
When you can't return a response object, throw it
There are cases when rendering had already started, but you have to return Your response nevertheless. A good example is when you have a django-cms plugin and a form in it. You want to redirect after the form was processed, but normally you can't do it. More information here: https://github.com/divio/django-cms/issues/79 http://groups.google.com/group/django-cms/browse_thread/thread/79ab6080c80bbcb5?pli=1
- middleware
- redirect
- django-cms
keeping filter states after edits
When saving an edit to an object from a filtered list view you are, by default, returned to list view without any of your filters applied. This solves that problem, keeping the filtered view in a session variable until you reach a point where the session key is deleted. The solution presented here is hugely based off of other's work with most of the solution gained from: [Admin: return to change_list with filter and pagination applied](http://djangosnippets.org/snippets/2415/ "Admin: return to change_list with filter and pagination applied") This solution offered the best approach in our mind over the others listed here on snippets since the solution didn't require changes to template code...this is completely self contained within your own admin.py files. The advantage to our solution over the above linked solution is that under different use cases the user may or may not be redirected to the filtered list_view. For example, if you edit an object and click the save and continue button, then you would lose the filter when you finally finished editing the object and clicked save. Added on here is a delete of the session key when users add objects, the reasoning we're going this route is we don't want to return users to filtered views when they just added a new object. Your mileage may vary and if so, it's easy enough to fit your own needs. HTHs
- filter
- admin
- change_list
datemate
This wil format the date to today at 1:03 pm , yesterday at 9:13 pm, 22 August at 10:08 pm
- datetime
- date
- date-format
Cache view by user (and anonymous)
Use this decorator in your views to cache HttpResponse per user, so each user has his own cache, instead of a shared one as `from django.views.decorators.cache.cache_page` does. Add this to use: from somewhere import cache_per_user @cache_per_user(ttl=3600, cache_post=False) def my_view(request): return HttpResponse("LOL %s"%(request.user)) All documentation inside the decorator are in brazilian portuguese, feel free to translate to english
- views
- cache
- decorator
Method Caching
A very simple decorator that caches both on-class and in memcached: @method_cache(3600) def some_intensive_method(self): return # do intensive stuff` Alternatively, if you just want to keep it per request and forgo memcaching, just do: @method_cache() def some_intensive_method(self): return # do intensive stuff`
- memcache
- cache
- decorator
- memcached
- decorators
- caching
Django using admin horizontal filter in forms
This snippet uses the admin FilterSelectMultiple widget in normal forms. Earlier I tried this without the **internationalization javascript** and failed, so I looked around the web and found couple of posts, they worked but suggest many customizations. I learnt from them that they had this *jsi18n* javascript included. I included it with mine and it worked. I have written a [detailed post](http://www.rohanjain.in/coding/2011/06/20/django-using-admin-horizontal-filter-in-forms/) about this.
- admin
- forms
- widget