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


class UserLabRedemption(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    lab_instance = models.OneToOneField(
        "labs.LabInstance",
        on_delete=models.CASCADE,
        null=True,
        blank=True,
    )
    lab_code = models.CharField(max_length=100, null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = "user_lab_redemptions"
        unique_together = ("user", "lab_instance")