game/models.py with TeeBall

models.py

from django.utils.translation import gettext_lazy as _

class Game(models.Model):
    
    TEEBALL_INTRODUCED_VERSION = "1.1.0"

    class GameType(models.TextChoices):
        BASEBALL = "BB", _("Baseball")
        SOFTBALL = "SB", _("Softball")
        TEEBALL = "TB", _("Tee-ball")

    type = models.CharField(
        max_length=2,
        choices=GameType.choices,
        default=GameType.BASEBALL,
    )