Hi,
I have two models, A and B. A.anchor is a foreignkey to B. I
currently have the following code:
B.objects.filter(id__in=[ x.anchor for x in
A.function_that_applies_filter_to_A(data) ])
function_that_applies_filter_to_A is defined elsewhere, and I'm
really not eager to change it (it's generated by about a page of
rather-hairy code; it checks against several other related tables,
including some minor tree-traversal in one table). It returns a
QuerySet. 'data' is some processed form data from a Web POST.
Is there a way to do this entirely in a single query, instead of
hitting the database once, applying a filter in Python, and then
hitting it again?
Thanks,
Adam
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