Not to discredit Django but if you're already using PostgreSQL you could use http://postgrest.com which is a more tightly knit component for fts.

With PostgREST you can avoid the abstractions overhead and just use plain SQL and REST calls, basically to do a fts using `to_tsquery` you would do:

CREATE TABLE blog_entry( headline text, body_text tsvector );

GET localhost:3000/blog_entry?body_text=fts.Cheese&select=headline