#convert postdata to queryset
    def get_queryset(self, postdata, character):
        #get starter queryset based on planet
        planet = self.cleaned_data["planet"]
        if planet:
            try:
                pk = int(planet)
                if pk > 0:
                    location = Planet.objects.get(pk=pk)
                    qs = Ship.objects.filter(character=character, location=location)
                    location = location.name
                else:
                    location = "Every Planet"
                    qs = Ship.objects.filter(character=character)
            except Planet.DoesNotExist, ValueError:
                location = "Every Planet"
                qs = Ship.objects.filter(character=character)
        else:
            qs = Ship.objects.filter(character=character)