from django.db import models


class RateLimitBucket(models.Model):
    """Fixed-window counter used by core.ratelimit. One row per key."""

    key = models.CharField(max_length=255, unique=True)
    window_start = models.DateTimeField()
    count = models.PositiveIntegerField(default=0)

    def __str__(self):
        return f"{self.key}: {self.count}"