Django查詢用戶按月增長

Question

有沒有辦法根據使用Django ORM按年/月分組的date_joined得到User count（）的方法？

我能得到我的Django的/的Postgres項目像這樣使用原始SQL這樣的數據：

from django.db import connection 
...  
    cursor = connection.cursor() 
    cursor.execute(''' 
     SELECT 
      to_char(date_joined, 'YYYY/MM') as month, 
      cast(count(id) as int) as total 
     FROM users_user 
     GROUP BY month 
     ORDER BY month DESC 
     ''') 

返回我的列表如下： [('2015/12', 105), ('2016/01' , 78), ('2016/02', 95)...]

Answer 1

嘗試：

from django.contrib.auth.models import User 
from django.db.models import Count 

User.objects.all() \ 
     .extra({'created': "to_char(date_joined, 'YYYY/MM')"}) \ 
     .values('created') \ 
     .annotate(created_count=Count('id')) \ 
     .order_by('-created')