Fails exporting more than 1000 records with UUIDs as PKs

[morlandi]

Hello,
I'm receiving the error Object of type UUID is not JSON serializable when selecting more than 1000 records for export.

The offending code is:

request.session[session_key] =  selected

since I'm using UUID as PKs in the exported Model, instead of Integers.

As a workaround, I JSON-serialized the list before saving into the session; see PR #5

Occasionally I saw the following exception:

The request's session was deleted before the request completed. The user may have logged out in a concurrent request, for example.

which I do not explain having little experience with Django sessions; my current settings being:

SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'
CACHES = {
    'default': {
        'BACKEND': 'redis_cache.RedisCache',
        'LOCATION': os.environ.get('REDIS_URL', 'redis://localhost:6379/0'),
        "KEY_PREFIX": INSTANCE_NAME,
    },
}

Thank you for attention ;)

[abidibo]

Hi @morlandi , thanks for your PR, I'll merge it as soon as I can.
I don't know why you're getting this session error, I guess is related to the session being actually deleted before the request succeeds. Did you take a look here https://stackoverflow.com/questions/46982576/the-requests-session-was-deleted-before-the-request-completed-the-user-may-hav ?

[morlandi]

Did you take a look here https://stackoverflow.com/questions/46982576/the-requests-session-was-deleted-before-the-request-completed-the-user-may-hav ?

Thanks; that's interesting, but doesn't apply here: a single user (me) using runserver in localhost 😉

When selecting all records, the selected list could get quite big; I tried with 100K UUIDS: while the export proceeded smoothly (👏 ), I got a significant 17MB session size.

I don't know if this is an issue to worry about; just wonder whether it's worth to delete the key after using it