在Django中是否可以将非模型字段添加到方法体中？

from django.db import models

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    age = models.IntegerField()

    def get_full_name(self):
        return f"{self.name} ({self.age} years old)"

    def get_greeting(self):
        return f"Hello, {self.name}!"

    def calculate_something(self):
        # 使用非模型字段进行计算
        result = self.age * 2 + 10
        return result

m = MyModel(name="John", age=25)
full_name = m.get_full_name()  # 返回 "John (25 years old)"
greeting = m.get_greeting()  # 返回 "Hello, John!"
result = m.calculate_something()  # 返回 60