[英]Django restframework - how to combine two queryset to Serialize in order of priority?
這是我的原始查詢: Movie.objects.filter(releaseday__gte=past_month.date(),releaseday__lte=today.date(),movie__movietime__gte=today).extra({'vrank': 'CASE WHEN hotrank=0 THEN 4 WHEN hotrank >=4 THEN 4 ELSE hotrank END'}).distinct().order_by('vrank','-releaseday')
但是結果重復了。
我看了看文件,說問題是一起使用order_by()
和distinct()
所以現在我需要按順序組合queryset1
和queryset2
。 首先顯示queryset1
的結果,
然后queryset2
請幫我謝謝
views.py:
class MovieList(MovieMixin, generics.ListAPIView):
serializer_class = MovieSerializer
def get(self, request, *args, **kwargs):
if request.GET.get("top"):
self.top(top)
return super(MovieList, self).get(request, *args, **kwargs)
def top(self,top):
queryset1 = Movie.objects.filter(releaseday__gte=past_month.date(),releaseday__lte=today.date(),movie__movietime__gte=today,hotrank__lte=3).exclude(hotrank=0).distinct().order_by('hotrank')
queryset2 = Movie.objects.filter(releaseday__gte=past_month.date(),releaseday__lte=today.date(),movie__movietime__gte=today).exclude(hotrank__lte=3,hotrank__gte=1).distinct().order_by('-releaseday')
self.queryset =( queryset1 | queryset2 )
您可以嘗試使用此
from itertools import chain
....
self.queryset = sorted(chain(queryset1, queryset2),
key=lambda instance: instance.releaseday)
這將組合queryset1和queryset2,然后按值realaseday
對其進行排序。
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