Hi,
I have a model with a PointField, created with the spatial_index set as True
(the default value). Doing a \d table_name on postgresql revealed the index
that was created, as expected.
I updated the spatial_index to False and ran the migrations, which *did not*
drop the index in the db.
I was also able to repro this with a PointField created with spatial_index as
False. When the field was updated to set spatial_index as True, an index was
not created in the database. Looks like AlterField migration is not working
with PointField and spatial_index.
I'm running Django 1.9.9 and PostgreSQL 9.5.1
Best,
Arjun