Django 如何访问一个抽象的 Base 模型局部变量

Django how to access an abstract Base model local variables

我定义了这个抽象基础模型如下:

class ActivityAbstractBaseModel(models.Model):
    POOR = 'PR'
    FAIR = 'FA'
    MEDIOCRE = 'ME'
    GOOD_ENOUGH = 'GE'
    GOOD = 'GO'
    VERY_GOOD = 'VG'
    EXCELLENT = 'EX'

    STATE = [
        (POOR, 'Poor'),
        (FAIR, 'Fair'),
        (MEDIOCRE,'Mediocre' ),
        (GOOD_ENOUGH, 'Good Enough' ),
        (GOOD, 'Good'),
        (VERY_GOOD, 'Very Good'),
        (EXCELLENT, 'Excellent'),
    ]

    speaking = models.CharField(max_length=50, choices=STATE, default=GOOD)

然后我如下继承这个抽象模型并添加新字段writing

class Fluency(ActivityAbstractBaseModel):
    writing = models.CharField(max_length=50, choices=STATE, default=GOOD)

现在,这个新字段 writing 正在尝试访问在摘要 class 中创建的变量 GOODSTATE 但我有 NameError 异常。有没有办法获取这些变量?

虽然您的 class 将继承那些 class 变量,但是您不能在定义 class 的地方直接引用它们的代码(因为它们不存在于该范围内)。相反,您可以在 class 声明中将它们称为 ActivityAbstractBaseModel.GOOD 等。

class Fluency(ActivityAbstractBaseModel):
    writing = models.CharField(max_length=50, choices=ActivityAbstractBaseModel.STATE, default=ActivityAbstractBaseModel.GOOD)

print(Fluency.GOOD) # This works properly