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POdjango admin filters cascading
 

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    <p>I've got a question - can Django Admin interface be customized in such a way, that it presents only those filter options that occur in the subset of data matching currently selected filters?</p> <p>Say I have a db of three objects:</p> <pre><code>a.Foo = "One" a.Bar = "Drink" b.Foo = "One" b.Bar = "Shot" c.Foo = "Two" c.Bar = "Shot" </code></pre> <p>And a django admin interface with filters on 'Foo' and 'Bar'. I want the following behavior: </p> <ul> <li>If no filters are chosen, 'Foo' lists "One","Two"; 'Bar' lists "Drink", "Shot"</li> <li>If 'Foo' filter is set to "One", 'Bar' lists both "Drink" and "Shot"</li> <li>If 'Foo' filter is set to "Two", 'Bar' lists only "Shot"</li> <li>If 'Bar' filter is set to "Shot", 'Foo' lists both "One" and "Two"</li> <li>If 'Bar' filter is set to "Drink", 'Foo' lists only "One"</li> </ul> <p>Cheers!</p> <hr> <p>To be more specific - after reading some docs:</p> <pre><code>from django.contrib.admin import SimpleListFilter class SomeFilter(SimpleListFilter): title = "Foo" parameter_name="Some" def lookups(self, request, model_admin): qs = model_admin.queryset(request) print qs.query return (('Foo', 'Bar')) def queryset(self, request, queryset): if (self.value()): return queryset.filter(Some=self.value()) else: return queryset </code></pre> <p>What it does, however, is gets the 'queryset' as it would've been without other filters. How can I pass it through other filters?</p> <hr> <p>I could theoretically parse the request and filter manually - but there surely needs to be a way to pipe all filters.</p>
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    1. COAdded more information after some research - I can't quite figure out how to get the queryset after all other filters have piped through it.
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