Code

Let’s say I have the following model:

class Course(models.Model):

    title = models.CharField(max_length=48)

    YEAR_CHOICES = [(r, r) for r in range(
            datetime.date.today().year-1, datetime.date.today().year+2
        )
    ]
    year = models.IntegerField(_('year'), choices=YEAR_CHOICES)

Question

Will the datetime.date.today() statements be evaluated right when the model is migrated, or will they be evaluated whenever the user accesses a form to set the year value for the Course model?

In other words, is my YEAR_CHOICES code above frozen to when I migrated my model or will it dynamically update as the years go by?