Model常用查询语句

数量

models.info.objects.filter(xxx=True).order_by('id').count()

set_res = models.info.objects.filter(xxx=True).order_by('id')[offset:offset+i_amount_per_page].values('xx', 'xxx', 'xxxx')
lst_res = list(set_res)

不为空

filter(xxx__isnull=False)