bookmark.py

class Bookmark(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    resource = models.ForeignKey("Resource", on_delete=models.CASCADE, related_name="bookmarks")
    # meta
    created_at = models.DateTimeField(auto_now_add=True)
    modified_at = models.DateTimeField(auto_now=True)

    class Meta:
        unique_together = ('user', 'resource',)
        ordering = ('resource',)

    def __str__(self):
        return "{} | {}".format(self.user, self.resource)

group.py

class BookmarkGroup(models.Model):
    name = models.CharField(max_length=50)
    slug = models.SlugField(null=False, unique=True)
    bookmarks = models.ManyToManyField(Bookmark, related_name='bookmark_groups')
    def __str__(self):
        return self.name

resource.py

class Resource(models.Model):
    """Initial representation of a resource."""
    # ID from fixture resources, for internal dedupe
    internal_id = models.CharField(max_length=20, null=True, blank=True)
    name = models.CharField(max_length=200)
    description = models.TextField(null=True, blank=True)
    categories = models.ManyToManyField("Category")
    neighborhoods = models.ManyToManyField("Neighborhood")
    email_contact = models.EmailField(null=True, blank=True)
    pdf = models.ManyToManyField("PDF")
    phone = models.CharField(max_length=200, blank=True, null=True)
    website = models.URLField(max_length=200, blank=True, null=True)

    # address
    street_address = models.CharField(max_length=400, null=True, blank=True)
    city = models.CharField(max_length=100, null=True, blank=True)
    state = models.CharField(max_length=10, null=True, blank=True)
    latitude = models.FloatField(null=True, blank=True)
    longitude = models.FloatField(null=True, blank=True)
    zip_code = models.CharField(max_length=10, null=True, blank=True)

    # meta
    created_at = models.DateTimeField(auto_now_add=True)
    modified_at = models.DateTimeField(auto_now=True)
    
    def __str__(self):
        return self.name

    def __unicode__(self):
        return u'{}'.format(self.name)

    @property
    def categories_str(self):
        return [str(t) for t in self.categories.all()]

    @property
    def neighborhoods_str(self):
        return [str(t) for t in self.neighborhoods.all() if t] or ["Houston"]

    @property
    def bookmark(self):
        """This is here to make it easier to serialize a standard resource."""
        return getattr(self, "_bookmark", None)

    @bookmark.setter
    def bookmark(self, bookmark):
        self._bookmark = bookmark