import datetime import datetime
from django.db import models

class Person(models.Model):
  lat = models.FloatField(verbose_name="latitude")
  lng = models.FloatField(verbose_name="longitude")
  date_created = models.DateTimeField()
  date_modified = models.DateTimeField()

  def save(self, *args, **kwargs):
    if self.date_created == None:
      self.date_created = datetime.now()

    self.date_modified = datetime.now()
    super(Person, self).save(*args, **kwargs)