text: from django.db import models
  from django.contrib.auth.models import User
  from datetime import datetime
  from django.db.models.signals import post_save
  from taggit.managers import TaggableManager
  
  class Item(models.Model):
      title = models.CharField(max_length=100)
      description = models.TextField(blank=True)
      created_date = models.DateTimeField(default=datetime.now)
      completed_date = models.DateTimeField(blank=True, null=True)
      user = models.ForeignKey(User)
      tags = TaggableManager(blank=True)
  
      def __str__(self):
          return self.title
  
  class Profile(models.Model):
      user = models.OneToOneField(User)
      location = models.CharField(max_length=100, blank=True)
      bio = models.TextField(blank=True)
      gender = models.CharField(max_length=20, blank=True)
      age = models.IntegerField(default=0, blank=True, null=True)
  
  def user_post_save(sender, instance=None, created=False, **kwargs):
      if instance is not None and created:
          Profile.objects.create(user=instance)
  
  post_save.connect(user_post_save, sender=User)
  