Django 模型使用另一个模型的文本选择

Question

在我的 Django 模型中，我想使用另一个模型中的文本选择，但我不想将其用作外键，因为我想要任何 Day 对象存在之前的工作日的完整列表。

如果我使用它作为外键，我需要首先创建 Day 对象。

有人能帮忙解决这个问题吗？

class Day(models.Model):
    class Weekdays(models.TextChoices):
        MONDAY = "Monday"
        TUESDAY = "Tuesday"
        WEDNESDAY = "Wednesday"
        THURSDAY = "Thursday"
        FRIDAY = "Friday"
        SATURDAY = "Saturday"
        SUNDAY = "Sunday"

    store = models.ForeignKey(Store, on_delete=models.DO_NOTHING)
    weekday = models.CharField(max_length=9, choices=Weekdays.choices)


class School(models.Model):
    
    weekday = ???

Answer 1

您可以通过以下方式重用Weekdays模型中Day的：

class Day(models.Model):
    # …
    pass


class School(models.Model):
    weekday = models.CharField(max_length=9, choices=Day.Weekdays.choices)

由于这些选择并不真正“属于”这两个模型中的任何一个，因此在两个类之外定义它们可能更有意义，因此：

class Weekdays(models.TextChoices):
    MONDAY = "Monday"
    TUESDAY = "Tuesday"
    WEDNESDAY = "Wednesday"
    THURSDAY = "Thursday"
    FRIDAY = "Friday"
    SATURDAY = "Saturday"
    SUNDAY = "Sunday"


class Day(models.Model):
    store = models.ForeignKey(Store, on_delete=models.DO_NOTHING)
    weekday = models.CharField(max_length=9, choices=Weekdays.choices)


class School(models.Model):
    weekday = models.CharField(max_length=9, choices=Weekdays.choices)