How to setup django-hstore with an existing app managed by south?

Question

I tried to use django-hstore using this nice tutorial. I added two classes to an existing app managed by South:

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Answer 1

Django now includes a migration operation to create the hstore extension in PostgreSQL:

from django.contrib.postgres.operations import HStoreExtension

class Migration(migrations.Migration):
    ...

    operations = [
        HStoreExtension(),
        ...
    ]