如何在Django中生成包含5位数字的uniquie ID

我目前正在使用Django创建一个网站，我已经让管理表单按照我的意愿运行，所以当我创建所有者Django时，它会生成一个包含特定数量数字的随机ID，并将该ID显示在所有者的名字和姓氏旁边。以下是django中使用的models.py：

class Owner(models.Model):
First_Name = models.CharField(max_length=100)
Last_Name = models.CharField(max_length=100)
email = models.CharField(max_length=100)
phone = models.IntegerField()
street_address = models.CharField(max_length=30)
Suburb = models.CharField(max_length=30)
postcode = models.IntegerField()
owner_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
def __str__(self):
return self.First_Name +" "+ self.Last_Name

class Pet_Description(models.Model):
description_id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
species = models.CharField(max_length=50)
pet_name = models.CharField(max_length=50)
weight_in_kg = models.IntegerField()
height_in_cm = models.IntegerField()
gender = models.CharField(max_length=10)
age = models.IntegerField()
owner_id = models.ForeignKey(Owner, on_delete=models.CASCADE)
overweight = models.CharField(max_length=50)
healthy = models.CharField(max_length=50)
indoor_or_outdoor = models.CharField(max_length=50)
def __str__(self):
return self.pet_name
class Booking(models.Model):
booking_ID = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
date = models.DateField()
time = models.TimeField()
owner_id = models.ForeignKey(Owner, on_delete=CASCADE)
def __unicode__(self):
return self.booking_ID 

class Payment(models.Model):
payment_ID = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
payment_type = models.CharField(max_length=50)
booking_ID = models.ForeignKey(Booking, on_delete=CASCADE)
def __unicode__(self):
return self.payment_ID
class Pet_Illness(models.Model):
pet_ID = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
owner_id = models.ForeignKey(Owner, on_delete=CASCADE)
type_of_illness = models.CharField(max_length=50)
description_of_illness = models.CharField(max_length=200)
def __str__(self):
return self.type_of_illness + ": " + self.description_of_illness
class Pet_History(models.Model):
pet_history_ID = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
pet_ID = models.ForeignKey(Pet_Description, on_delete=CASCADE)
Visited_vet_before = models.CharField(max_length=50)
First_time_of_illness = models.DateField()
Special_Medication = models.CharField(max_length=50)
Medication_Description = models.CharField(max_length=50)
def __unicode__(self):
return self.pet_history_ID