fts8.py

...
from djorm_pgfulltext.models import SearchManager
from djorm_pgfulltext.fields import VectorField
...
class Post(models.Model):
    """
    Django Model for a blog entry
    """
    title = models.CharField(max_length=250)
    body = models.TextField(blank=True)
    search_index = VectorField()

    objects = models.Manager()
    search_manager = SearchManager(
        fields=('title', 'body'),
        config='pg_catalog.english',
        search_field='search_index',
        auto_update_search_field=True
    )