related.py 文件源码

def get_queryset(self):
        qs = super(AutocompleteLookup, self).get_queryset()
        qs = self.get_filtered_queryset(qs)
        qs = self.get_searched_queryset(qs)
        if connection.vendor == 'postgresql':
            ordering = list(self.model._meta.ordering)
            distinct_columns = [o.lstrip('-') for o in ordering] + [self.model._meta.pk.column]
            return qs.order_by(*ordering).distinct(*distinct_columns)
        else:
            return qs.distinct()