fields.py

from django.db import models


PRIVACY_LEVEL_CHOICES = [
    ('me', 'Only me'),
    ('followers', 'Me and my followers'),
    ('instance', 'Everyone on my instance, and my followers'),
    ('everyone', 'Everyone, including people on other instances'),
]


def get_privacy_field():
    return models.CharField(
        max_length=30, choices=PRIVACY_LEVEL_CHOICES, default='instance')