Django Model Use Text Choices From Another Model

Question

In my Django model, I want to use the text choices from another model, but I don't want to use it as a foreign key, because I want the whole list of weekdays before any Day object exists.

If I use it as a foreign key, I will need to create Day object first.

Can anyone help to solve this?

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

You can reuse the Weekdays from the Day model, with:

class Day(models.Model):
    # …
    pass


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

Since the choices do not really "belong" to any of the two models, it might make more sense to define these outside the two class, so:

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)