Python 如何在创建模型实例时创建特殊函数？

我正在制作一个系统，当用户创建一个日志时，他会从如何创建日志中获得分数。我该怎么做才能做到这一点呢？我尝试创建一个signal.py函数，但它给了我一个错误“DPRLog”对象没有属性“Points”。我做得对吗？我只想在创建日志时添加点，所以我将其作为signal.py类放置。有人能帮我吗？谢谢

这是我的models.py：

from django.db import models
from profiles.models import User
from django.urls import reverse



# Create your models here.

class Points(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    points = models.IntegerField(default=0, null=False)

    def __str__(self):
        return self.user.username


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image = models.ImageField(default='default.png', upload_to='profile_pics')

    def __str__(self):
        return f'{self.user.username} Profile'


class Manager(models.Model):
    manager = models.OneToOneField(User, on_delete=models.CASCADE)

    def __str__(self):
        return self.manager.full_name


class Member(models.Model):
    manager = models.ForeignKey(Manager, on_delete=models.CASCADE)
    member = models.OneToOneField(User, on_delete=models.CASCADE)
    name = models.CharField(max_length=30, null=True)

    def __str__(self):
        return self.member.full_name


class Job(models.Model):
    manager = models.ForeignKey(Manager, on_delete=models.CASCADE)
    member = models.ForeignKey(Member, on_delete=models.CASCADE)
    title = models.CharField(max_length=30, blank=False, null=False)
    description = models.TextField()
    datePosted = models.DateTimeField(auto_now=True)
    file = models.FileField(null=True, blank=True, upload_to='job_files')

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('job-detail', kwargs={'pk': self.pk})

class DPRLog(models.Model):
    STATUS_CHOICES = (

        ('PENDING', 'PENDING'),
        ('CANCELLED', 'CANCELLED'),
        ('COMPLETED', 'COMPLETED'),


        )
    TASKS_CHOICES = (
        ('TESTS EXECUTION', 'TESTS EXECUTION'),
        ('TESTS DESIGN', 'TESTS DESIGN'),
        ('MOBILE TESTING WORKSHOP', 'MOBILE TESTING WORKSHOP'),
        ('BENCH ACTIVITY', 'BENCH ACTIVITY'),
        ('DEFECT ANALYSIS','DEFECT ANALYSIS'),
    )




    testuser = models.ForeignKey(User,on_delete = models.CASCADE,unique_for_date= 'reportDate')
    status = models.CharField(max_length=30, choices=STATUS_CHOICES,null=True)
    reportDate = models.DateField(blank=False, null=False)
    login = models.TimeField(blank=False, null=False)
    logout = models.TimeField(blank=False, null=False)
    totalHours = models.DecimalField(max_digits=4,decimal_places=2,null=True)
    OTHours = models.DecimalField(max_digits=4,decimal_places=2,null=True)
    mainTasks = models.CharField(max_length=50, blank=False, choices=TASKS_CHOICES, null=True)
    remarks = models.CharField(max_length=30,null=True)

    def __str__(self):
        return f'{self.testuser.full_name} DPR Log'

    @property
    def CalculateTotalHours(self):
        self.totalHours = self.logout.timeDelta - self.login.TimeDelta
        return self.TotalHours

    @property
    def OTHours(self):
        if self.totalHours > 9.00:
            self.OTHours = self.totalHours-9.00

和Signals.py：

@receiver(post_save, sender=DPRLog)
def add_point(sender, instance, created, **kwargs):
    instance.Points+=1

---

DPRLog

表上没有

点

字段。我猜您想通过

DPRLog->User>points

增加

points

模型上的

字段，因此，除非您在一对一字段中定义相关的\u名称，否则ORM将使用小写的模型名称访问相关对象：

instance.testuser.points.points +=1
instance.testuser.points.save()

所以我必须为DPRLog中的点添加一个OTM？我只想像你说的那样访问它。我的问题是，当我执行a.save（）时，它会创建另一个points实例吗？或者只是将其添加到现有实例上？嘿，它可以工作，谢谢，但当我添加.save（）时，它会给我一个错误，即“int”对象没有属性“save”，我想知道模型是否已更改？您可以简单地做一点-将
相关的\u name
参数添加到
Points
model
user
字段中，然后您就可以以更简单的方式写回引用，比如
instance.testuser.user\u Points.save（）
我将其更改为：
（instance.testuser.points.points+=1 instance.testuser.points.save（））
'code'