When you call model.changed_columns() you get a dict of all changed values. When you call model.is_dirty() you get boolean whether or not the object has been changed since last save Based on an answer here:http://stackoverflow.com/questions/110803/dirty-fields-in-django but fixed and added is_dirty
A simple context_processor to include location info. Useful for permalinks, site name references, and navigation bars. For example: {% if location.path|match:"/$" %} class="current"{% endif %} See also my [match filter](/snippets/1686/).
A filter that re.matches a regex against a value. Useful for nav bars as follows: {% if location.path|match:"/$" %} class="current"{% endif %} For `location.path` see my [location context_processor](/snippets/1685/).
Ripped this out of a project I'm working on. The field renders as two <select> elements representing the two-level hierarchy organized events Facebook uses. Returns the id's Facebook wants.
Limit ManyToMany fields in forms. Hide the field, if only one item can be selected. e.g. For limit sites choices only to accessible sites. Also available via django-tools: http://code.google.com/p/django-tools/
When debugging/developing you want to be able to refresh your views every time you make a little change. But when in production mode you might want to cache these views because they contain long and resource hungry calculations or something. By putting this above "hack" in after importing `cache_page` you only cache the views in production mode.
Shell example: >>> pprint.pprint(settings.FORUM_TAGS) ((u'x11', 'Xorg'), (u'pacman', 'Pacman'), (u'aur', 'AUR'), (u'abs', 'ABS'), (u'howto', 'HOWTO'), (u'instalacja', 'Instalacja'), (u'offtopic', 'Offtopic')) >>> t = Thread.objects.all()[0] >>> pprint.pprint(t.tags) [{'slug': u'pacman', 'title': 'Pacman'}, {'slug': u'abs', 'title': 'ABS'}, {'slug': u'howto', 'title': 'HOWTO'}, {'slug': u'instalacja', 'title': 'Instalacja'}, {'slug': u'offtopic', 'title': 'Offtopic'}] >>> t.tags = [{'slug': 'abs'}, {'slug': 'howto'} >>> t.save() >>> t = Thread.objects.get(pk=t.pk) >>> pprint.pprint(t.tags) [{'slug': u'abs', 'title': 'ABS'}, {'slug': u'howto', 'title': 'HOWTO'}] >>> t.tags = ['Offtopic', 'HOWTO'] >>> t.save() >>> t = Thread.objects.get(pk=t.pk) >>> pprint.pprint(t.tags) [{'slug': u'howto', 'title': 'HOWTO'}, {'slug': u'offtopic', 'title': 'Offtopic'}]
This is simple validation weather a string is close enough to what we want. First param is keyword we are comparing to Second is user's input and third is tolerance level. Its very rudimentary. I have my mind fixed upon some imperfections. I am trying to make it good for human like(crazy keyboard) error.
By default all forms created using inlineformset_factory are displayed as tables (because there is only a .as_table method) and there are no .as_p or .as_ul methods in them, so you need to do that by hand.
This is useful to run before you add a unique key to a character field that has duplicates in it. It just adds numbers to the end of the contents, so they will be unique. It takes a model class and a field name. The model class can be a South fake orm object, so this can be used inside data migrations.
Template filter to add the given number of tabs to the beginning of each line. Useful for keeping markup pretty, plays well with Markdown. Usage: {{ content|indent:"2" }} {{ content|markdown|indent:"2" }}
This will reload the translation file for every request if you add it as a middleware in settings.MIDDLEWARE_CLASSES.
Hi, I made some small custom psycopg2 backend that implements persistent connection using global variable. With this I was able to improve the amout of requests per second from 350 to 1600 (on very simple page with few selects) Just save it in the file called base.py in any directory (e.g. postgresql_psycopg2_persistent) and set in settings DATABASE_ENGINE to projectname.postgresql_psycopg2_persistent This code is threadsafe, however because python don't use multiple processors with threads you won't get bit performance boost with this one. I really recommend using it in daemon mode. In apache mod_wsgi just set processes=8 threads=1
Search engines might conclude there's duplicate content if `/some_view/` and `/some_view/?page=1` returns the same results. This middleware redirects `?page=1` to the URL without the page parameter. You can set the name of the parameter in settings.py as `PAGE_VAR`. See [here](http://www.muhuk.com/2009/08/a-civilized-way-display-lots-of-data/) for more details.
This function lets you save an instance of a model to another database based on a connection argument. Useful when doing data migrations across databases. Connection is anything that would work as a django.db.connection I'm not sure if this handles proxy models or model inheritance properly, though.