用于
django < 2.0
你可以用
Conditional Expressions
和
Sum()
要注释所需的值,请执行以下操作:
from django.db.models import Sum, Case, When
from django.db.models.functions import TruncMonth
queryset = UserProfile.objects.filter(date_created__year='2018').annotate(
date=TruncMonth('date_created'),
).values('date').annotate(
total_entries=Count('id'),
total_male=Sum(Case(When(gender='M', then=1), default=0, output_field=models.IntegerField())),
total_female=Sum(Case(When(gender='F', then=1), default=0, output_field=models.IntegerField())),
)
自
django 2.0
你可以用
Conditional Aggregation
以下内容:
from django.db.models import Count, Q
from django.db.models.functions import TruncMonth
queryset = UserProfile.objects.filter(date_created__year='2018').annotate(
date=TruncMonth('date_created'),
).values('date').annotate(
total_entries=Count('id'),
total_male=Count('id', filter=Q(gender='M')),
total_female=Count('id', filter=Q(gender='F')),
)