Use
update()
on QuerySet.
———–
e.g.,
>>>Card.objects.all().update(country=’USA’)
The update() method has a return value which is an integer that represents how many records changed.
Aug 022009
Aug 022009
Use
objects.filter
———
e.g.,
>>>Card.objects.filter(name=’Hot Pot’)
>>>Card.objects.filter(name=’Hot Pot’, city=’San Diego’)
>>>Card.objects.filter(name_contains=’Hot’)
[<Card: Hot Pot>]
Note that here filter() returned a
QuerySet
which is like a list.
Jul 252009
keyword_results=Card.objects.filter(searchkeyword__keyword__in=query.split()).distinct()
if keyword_results.count() == 1:
return HttpResponsRedirect(keyword_results[0].get_absolute_url())
————
results of database queries is special object called
QuerySet
is the class Django uses to represent a database query.
Each QuerySet has methods such as,
filter()
distinct()
count()
etc.
