Question

CHOICES = (('Earned Leave','Earned Leave'),('Casual Leave','Casual Leave'),('Sick Leave','Sick Leave'),('Paid Leave','Paid Leave'))
STATUS_CHOICES = (('0', 'Rejected'),('1', 'Accepted'),)

class Leave(models.Model):

    employee_ID = models.CharField(max_length = 20)
    name = models.CharField(max_length = 50)
    user = models.ForeignKey(User, on_delete = models.CASCADE, null =True)
    type_of_leave = models.CharField(max_length = 15, choices = CHOICES)
    from_date = models.DateField()
    to_date = models.DateField()
    status = models.CharField(max_length = 15, choices = STATUS_CHOICES)

class History(models.Model):

    name = models.CharField(max_length = 50)
    employee_ID = models.CharField(max_length = 20)
    earned_leave = models.IntegerField()
    casual_leave = models.IntegerField()
    sick_leave = models.IntegerField()
    paid_leave =models.IntegerField()

    def __str__(self):
        return self.name

我只想在name之后将值employee_ID和Leave从模型History存储到模型status == 1中。我对django还是很陌生，请帮助我。

Answer 1

如果您想将一个模型与另一个模型相关联，则可以根据关系使用OneToOneField，ManyToManyField，ForeignKey等

您要做的是，您有一个模型Leave，其中包含字段employee_ID，name和user

另一个模型History，具有字段employee_ID，name，user（从Leave继承）和emp_ID，full_name。这只是扩展该模型类并创建新的模型对象。两者将仅无关。（我没有足够的经验来告诉您确切的/详细的行为）

因此，根据您的情况，您可以从历史记录模型中获取一个OneToOneField（或其他基于您的业务逻辑的东西）来保留类似这样的模型。

class Leave(models.Model):
    employee_ID = models.CharField(max_length = 20)
    name = models.CharField(max_length = 50)
    user = models.ForeignKey(User, on_delete = models.CASCADE, null =True)


class History(models.Model):
    emp_ID = models.CharField(('employee ID'),max_length = 25)
    full_name = models.CharField(('Name'),max_length = 40)
    leave = models.OneToOneField(Leave, on_delete = models.SET_NULL)

然后您可以按以下方式保存数据：

# I am assuming you're inside some view and you want to create leave for the user who is logged in, refactor based on your requirements
leave = Leave.objects.create(employee_ID="EMPLOYEEID", name="EMPLOYEENAME", user=request.user)
# here pass the leave that we have created previously
history = History.objects.create(emp_ID="EMPLOYEEID", full_name="EMPLOYEEFULLNAME", leave=leave)

我假设您还有休假开始datetime字段。我认为您还应该研究为什么两个模型都重复使用员工ID。

如果您有任何疑问/疑问，请告诉我。谢谢〜

如何在Django中将值从一个模型存储到另一个模型？

1 个答案: