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BackupCode model — recovery codes for MFA.
Maps to AGENT.md DBML: `backup_codes` table (Lines 237-243).
"""
from django.conf import settings
from django.db import models
from core.models import BaseModel
class BackupCode(BaseModel):
"""
One-time backup codes for MFA recovery.
Codes are stored as hashes. Once used, `used_at` is set and the code
cannot be reused.
"""
user = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.CASCADE,
related_name="backup_codes",
)
code_hash = models.CharField(max_length=255)
used_at = models.DateTimeField(null=True, blank=True)
class Meta:
db_table = "backup_codes"
ordering = ["created_at"]
def __str__(self) -> str:
status = "used" if self.used_at else "available"
return f"BackupCode for {self.user_id} [{status}]"
@property
def is_used(self) -> bool:
return self.used_at is not None
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