Is there a simple way to do the following that I'm just not seeing, or
am I looking at trying to write a custom tag? The functionality I
need is similar to {% regroup %} but not quite the same...
My app currently has a custom admin view in which I've defined a whole
bunch of different lists, which are all objects of the same model,
filtered according to different options of a field called "Type".
(eg. type_A_list = mymodel.objects.filter(Type="A"); type_B_list =
mymodel.objects.filter(Type="B"); etc.)
I've realised that the number of database hits this involves is
inefficient, and it would be cleaner to have a single list of objects
and try to perform the logic I need at the template level.
What I'd like to be able to do is, for a single variable,
"object_list", define subsets of this list containing objects that
meet a certain condition. So, to filter by the field "Type", I could
define lists called "type_A_list", "type_B_list", etc, that could be
iterated through in the same way as the original list.
The reason I need to do this is to be able to use the {% if
type_A_list %} tag in order to flag when there are NO objects of a
given type. This is why (as far as I can see) the {% regroup %} tag
won't quite work, as it only lists the groups that actually have
members.
Output would look something like:
Type 1:
Object 1, Object 5, Object 6
Type 2:
There are no objects of Type 2
Type 3:
Object 2, Object 4
Does anyone have any suggestions?
Thanks,
Bianca
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