#15089: contrib.sites and multitenancy
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Reporter: legutierr | Owner: apollo13
Type: New feature | Status: new
Component: contrib.sites | Version:
Severity: Normal | Resolution:
Keywords: | Triage Stage: Design
Has patch: 1 | decision needed
Needs tests: 0 | Needs documentation: 0
Easy pickings: 0 | Patch needs improvement: 1
| UI/UX: 0
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Comment (by anonymous):
I like the latest patch as it's lightweight and somehow mitigates the
issue, it'll reduce to the minimum the number of hacks required to achieve
multitenancy.
It's worth noting that there are a few places in django that use
SiteManager.get_current() instead of get_current_site(). A quick scan gave
me sitemaps, comment feeds and comment moderation. These are usually from
functions that don't have access to the request. I'd say this patch should
include some refactoring to completely remove get_current() usage. It
should probably be documented that any use of get_current() in third-party
apps will break multitenancy, instead of recommending get_current() as
it's currently the case, it should be strongly advised against.
Proper multitenancy is still not achieved, even with this patch, because
it doesn't address things like MEDIA_ROOT, MEDIA_URL,
EMAIL_SUBJECT_PREFIX, DEFAULT_FROM_EMAIL that are needed for most
multitenant usages.
For completeness I'll also mention TIME_ZONE, LANGUAGE_CODE and
ROOT_URLCONF that are important elements of multitenancy as well, even
though it's already possible to affect their value on a per request basis
without resorting to terrible hacks.
To solve this issue some people resort to wrapping settings and storing
their values in threaded locals, at one point or another it breaks as some
code don't like wrapped values. Since django is fundamentally broken when
it comes to multitenancy I suggest to people that really need it and that
can afford single-thread installations to simply modify settings on the
fly. It's frowned upon but other solutions are just as bad.
--
Ticket URL: <https://code.djangoproject.com/ticket/15089#comment:36>
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