old_contents: from __future__ import unicode_literals
  from django.contrib.auth.models import User
  from django.db import models
  import uuid
  from cloudinary.models import CloudinaryField
  
  # Create your models here.
  class Post(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.ForeignKey(User, on_delete=models.CASCADE)
  	markdown = models.BooleanField(default=False)
  	content = models.TextField()
  	#image = models.ImageField(upload_to="images/post", null=True, blank=True)
  	image = CloudinaryField('image', default=None, blank=True)
  	visibility = models.CharField(max_length=30)
  	user_can_view = models.ForeignKey(User, related_name='+', blank=True)
  
  class Author(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.OneToOneField(User, on_delete=models.CASCADE)
  	host = models.CharField(max_length=30)
  	#photo = models.ImageField(upload_to="images/profile", default="socialp2p/images/profile/default-avatar.jpg", null=True, blank=True)
  	photo = CloudinaryField('image', default='image/upload/v1457219004/default-avatar.jpg', blank=True)
  	friends = models.ManyToManyField(User, related_name="friend", blank=True)
  
  class Comment(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.ForeignKey(User, on_delete=models.CASCADE)
  	post = models.ForeignKey(Post, on_delete=models.CASCADE)
  	content = models.TextField()
  	datetime = models.DateTimeField(auto_now=True)
  
  class FriendRequest(models.Model):
  	requester = models.ForeignKey(User,related_name="requester", on_delete=models.CASCADE)
  	receiver = models.ForeignKey(User,related_name="receiver", on_delete=models.CASCADE)
  	accepted = models.BooleanField(default=False)
  	datetime = models.DateTimeField(auto_now=True)
  
    	def __unicode__(self):
  		return self.requester.username + " to " + self.receiver.username
  
new_contents: from __future__ import unicode_literals
  from django.contrib.auth.models import User
  from django.db import models
  import uuid
  from cloudinary.models import CloudinaryField
  
  # Create your models here.
  class Post(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.ForeignKey(User, on_delete=models.CASCADE)
  	markdown = models.BooleanField(default=False)
  	content = models.TextField()
  	#image = models.ImageField(upload_to="images/post", null=True, blank=True)
  	image = CloudinaryField('image', default=None, blank=True)
  	visibility = models.CharField(max_length=30)
  	user_can_view = models.ForeignKey(User, related_name='+', blank=True)
  
  class Author(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.OneToOneField(User, on_delete=models.CASCADE)
  	host = models.CharField(max_length=30, default="http://socialp2p.herokuapp.com")
  	#photo = models.ImageField(upload_to="images/profile", default="socialp2p/images/profile/default-avatar.jpg", null=True, blank=True)
  	photo = CloudinaryField('image', default='image/upload/v1457219004/default-avatar.jpg', blank=True)
  	friends = models.ManyToManyField(User, related_name="friend", blank=True)
  
  class Comment(models.Model):
  	uuid = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
  	user = models.ForeignKey(User, on_delete=models.CASCADE)
  	post = models.ForeignKey(Post, on_delete=models.CASCADE)
  	content = models.TextField()
  	datetime = models.DateTimeField(auto_now=True)
  
  class FriendRequest(models.Model):
  	requester = models.ForeignKey(User,related_name="requester", on_delete=models.CASCADE)
  	receiver = models.ForeignKey(User,related_name="receiver", on_delete=models.CASCADE)
  	accepted = models.BooleanField(default=False)
  	datetime = models.DateTimeField(auto_now=True)
  
    	def __unicode__(self):
  		return self.requester.username + " to " + self.receiver.username
  
subject: add default value to host attribute