问Django ArrayField默认值应该是可调用的

EN

我试图在django项目中使用postgresql ArrayField，将其设置为默认设置，但我无法消除警告ArrayField default should be a callable instead of an instance so that it's not shared between all field instances. HINT: Use a callable instead, e.g. use list instead of []

这是我的密码：

def get_default_subscriptions():
    return 'Noticias, Promociones, Pagos, Compras'.split(', ') # this returns a list
 
class myModel(models.model):
    # other fields
    subscriptions = ArrayField(models.CharField(max_length=200), default=get_default_subscriptions()) # this is a callable, so, why the warning?

医生们说：If you give the field a default, ensure it’s a callable such as list (for an empty default) or a callable that returns a list (such as a function). Incorrectly using default=[] creates a mutable default that is shared between all instances of ArrayField.

你能告诉我我做错了什么吗？