from django.db import models class Signup(models.Model): email = models.EmailField() created_at = models.DateTimeField(auto_now_add=True) anonymized_ip = models.GenericIPAddressField() user_agent = models.CharField(max_length=255, blank=True) geoip = models.JSONField(null=True, blank=True) referrer = models.CharField(max_length=255, blank=True) class Meta: constraints = [ models.UniqueConstraint(name="unique_email", fields=["email"]), ] def __str__(self): return self.email def place_name(self): if geoip := self.geoip: return "{}, {}".format(geoip["city"], geoip["country_name"]) return "??"