[Python] Unknown command: 'update_search_field' with pgfulltext

Following the instructions on https://github.com/linuxlewis/djorm-ext-pgfulltext I added a search_index to one of my existing PostgreSQL models, as follows:

search_index = VectorField()

objects = SearchManager(
fields = ('materials','origin','style'),
config = 'pg_catalog.english',
search_field = 'search_index',
auto_update_search_field = True
)


Using my virtual-env and having pgfulltext installed, with this version djorm-ext-pgfulltext==0.9.3 according to pip freeze, I cd to the directory where manage.pyis located. And tried to run:

./manage.py update_search_field app_name


Which resulted in the following error:

Unknown command: 'update_search_field' Type 'manage.py help' for usage.
​

Am I missing something on how this command is used? Should I add the index directly to my db instance with psql? And if so, how could I achieve this? Any help will be much appreciated.

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