<filename>learning_greek/models.py
from django.db import models

from django.contrib.auth.models import User


ADOPTION_LEVEL_CHOICES = [
    ("bleeding-edge", "Bleeding Edge"),
    ("early-adopter", "Early Adopter"),
    ("mainstream", "Mainstream"),
]


class Preference(models.Model):
    user = models.OneToOneField(User)
    adoption_level = models.CharField(max_length=20, default="early-adopter", choices=ADOPTION_LEVEL_CHOICES)

<filename>learning_greek/models.py
from django.db import models

from django.contrib.auth.models import User


ADOPTION_LEVEL_CHOICES = [
    ("bleeding-edge", "Bleeding Edge"),
    ("early-adopter", "Early Adopter"),
    ("mainstream", "Mainstream"),
]


class Preference(models.Model):
    user = models.OneToOneField(User)
    adoption_level = models.CharField(max_length=20, default="early-adopter", choices=ADOPTION_LEVEL_CHOICES)
