Django 模型使用來自另一個模型的文本選擇

Question

在我的 Django 模型中，我想使用另一個模型中的文本選擇，但我不想將它用作外鍵，因為我想要在任何 Day 對象存在之前的整個工作日列表。

如果我將它用作外鍵，則需要先創建 Day 對象。

任何人都可以幫助解決這個問題嗎？

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

您可以重用Day模型中的Weekdays ，包括：

class Day(models.Model):
    # …
    pass


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

由於這些選擇並不真正“屬於”兩個模型中的任何一個，因此在兩個類之外定義它們可能更有意義，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)