#29001: postgres connection hstore support can disappear in low memory
situations
-------------------------------------+-------------------------------------
Reporter: Ronan Klyne | Owner: (none)
Type: Bug | Status: new
Component: contrib.postgres | Version: 1.8
Severity: Normal | Resolution:
Keywords: postgres hstore | Triage Stage:
signal weakref | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Ronan Klyne):
I honestly don't know enough about the GC to explain this properly in the
docs but I have seen the problem happen in django-hstore. I was reading
the Django code and saw the same pattern so I pushed the same fix as a PR
here. At the very least it seemed like a more explicit description of the
desired effect - I don't think we would ever want this signal handler to
be garbage collected.
Django itself is using a module level function and django-hstore uses a
module level singleton callable class. That's close enough that I would
imagine that it's vulnerable to whatever peculiarity was breaking django-
hstore, though I can't explain why the garbage collector would collect it.
When this problem occurs it manifests as an hstore field being set to a
string value on the Model - the dictionary deserialisation is never
triggered.
Maybe you just want to archive this until that situation arises in the
wild?
--
Ticket URL: <https://code.djangoproject.com/ticket/29001#comment:3>
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