submitter = models.ForeignKey(User, related_name="product vendor")

class Product(models.Model):
    title = models.CharField(max_length=100)
    slug = models.SlugField(unique=True)
    image = models.ImageField(verbose_name=u'Image', upload_to="product_pic", blank=True)
    catalog = models.ForeignKey(Catalog)
    subcatalog = models.ManyToManyField(Subcatalog)
    description = models.TextField(blank=True, help_text="Describe product")
    submitter = models.ForeignKey(User, related_name="shop_submitter")
    price = models.DecimalField(max_digits=15, decimal_places=2)
    sale_price = models.DecimalField(max_digits=15, decimal_places=2)
    is_active = models.BooleanField(default=True)
    is_featured = models.BooleanField(default=False)
    quantity = models.IntegerField()
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    shop = models.ForeignKey(Shop)
    
    def __unicode__(self):
        return self.title