Misago/misago/threads/models/pollvote.py

from django.conf import settings
from django.db import models
from django.utils import timezone


class PollVote(models.Model):
    category = models.ForeignKey("misago_categories.Category", on_delete=models.CASCADE)
    thread = models.ForeignKey("misago_threads.Thread", on_delete=models.CASCADE)
    poll = models.ForeignKey("misago_threads.Poll", on_delete=models.CASCADE)
    voter = models.ForeignKey(
        settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.SET_NULL
    )
    voter_name = models.CharField(max_length=255)
    voter_slug = models.CharField(max_length=255)
    voted_on = models.DateTimeField(default=timezone.now)
    choice_hash = models.CharField(max_length=12, db_index=True)

    class Meta:
        index_together = [["poll", "voter_name"]]