django模型聚合过滤器按不同时间

Question

型号如下：

class UserInfo(models.Model):

    login_id=models.CharField(db_column='login_id',max_length=50,unique=True)
    passport_name=models.CharField(db_column='passport_name',max_length=50)
    identity_id=models.CharField(db_column='identity_id',max_length=50,null=True)
    company=models.CharField(db_column='company',max_length=50,null=True)

    ctime = models.DateTimeField(db_column='ctime', blank=True, null=True)
    utime = models.DateTimeField(db_column='utime', blank=True, null=True)
    class Meta:
        managed = True
        db_table = "user_info"


class UserViewpoint(models.Model):
    title=models.CharField(db_column='title',max_length=100)
    userid=models.ForeignKey(UserInfo,db_column='userid',to_field='login_id',related_name='rel_tg_viewpoint')
    ctime = models.DateTimeField(db_column='ctime', blank=True, null=True)
    utime = models.DateTimeField(db_column='utime', blank=True, null=True)
    class Meta:
        managed = True
        db_table = "user_viewpoint"



class UserRelationHistory(models.Model):
    """docstring for TgRelationHistory"""

    adviser_id=models.ForeignKey(UserInfo,to_field='login_id',db_column='adviser_id',related_name='rel_tg_relation_history')
    common_id=models.CharField(db_column='common_id',max_length=100)
    ctime = models.DateTimeField(db_column='ctime', blank=True, null=True)
    utime = models.DateTimeField(db_column='utime', blank=True, null=True)
    class Meta:
        managed = True
        db_table = "user_relation_history"

我想得到这样的结果： user_id,count_viewpoint,count_relation_new,count_relation_utilnow

count_realtion_new:new realtions when user_relation.ctime in (start,end)

count_relation_utilnow：user_relation.ctime 的总数

Answer 1

在以下链接中查看此文档： https://docs.djangoproject.com/en/1.9/topics/db/

您可以使用 Django ORM 执行您可以使用关系数据库执行的所有操作。