ImportError：Django中没有名为函数的模块

Question

How to add functions in my model?

from django.db.models.functions import TruncMonth
ImportError: No module named functions

    report.objects.filter(r_id=id, r_checkin_date__gte=checkin_date)
        .annotate(month=ExtractMonth('timestamp')) 
        .values('month')                          
        .annotate(count=Count('id'))                  
        .values('month', 'count') 

Answer 1

What version on Django are you using:

from django.db.models.functions.datetime import TruncMonth is only available in version 1.10 and dev

here is source code link