old_contents: """Models."""
  from django.db import models
  from django.contrib.auth.models import User
  
  
  # Create your models here.
  
  
  class ImagerProfile(models.Model):
      """Imager Profile Model."""
  
      camera_model = models.CharField(max_length=200)
      photography_type = models.TextField()
      # friends = models.ManyToManyField('self')
      region = models.CharField(max_length=200)
      user = models.OneToOneField(User, unique=True, null=False)
  
      def is_active(self):
          """Return if the user can log in."""
          return self.user.is_active
  
  
  class ActiveUserManager(models.Manager):
      """Manager to grab active users."""
  
      def get_query_set(self):
          """Return only active users."""
          return super(ActiveUserManager, self).get_query_set().filter(user.is_active())
  
  
  
  
  
  
  
new_contents: """Models."""
  from __future__ import unicode_literals
  
  from django.db import models
  from django.contrib.auth.models import User
  
  
  # Create your models here.
  
  
  class ActiveUserManager(models.Manager):
      """Manager to grab active users."""
  
      def get_query_set(self):
          """Return only active users."""
          return super(ActiveUserManager, self).get_query_set().filter(user.is_active)
  
  
  class ImagerProfile(models.Model):
      """Imager Profile Model."""
  
      camera_model = models.CharField(max_length=200)
      photography_type = models.TextField()
      # friends = models.ManyToManyField('self')
      region = models.CharField(max_length=200)
      user = models.OneToOneField(User, unique=True, null=False)
  
      # Need to have models.Manager since we overwrote default with ActiveUser
      # Without it, we would have lost reference to 'objects'
      objects = models.Manager()
      active = ActiveUserManager()
  
      @property
      def is_active(self):
          """Return all instances of active ImagerProfile."""
          return self.user.is_active
  
  
  
  
  
  
  
  
  # We control the profile, don't have code for user
  # If profile is deleted, user is deleted. We want the opposite.
  # How do we do that?
  # Idea of Signals (pyramid also has)
  # Signals hook into the listener pattern (like event listeners)
  # Imager profile exists, and gets removed (handelers.py)
  # first arg(sender(class that sent signal), **kwargs)
  # Must ensure errors aren't raised. Log problem, do nothing.
  # If errors are raised, it will prevent other things from happening
  # Must put signal code into a place where Django can execute it.
  # in apps.py def ready(self): from imager_profile import handlers (will register handlers)
  # In init.py add default_app_config = 'imager_rofile.apps.ImagerProfileConfig'
  # now Django knows about handlers
  
subject: Add ability to access all 'objects' and only 'active' users