#373: Django lacks support for multiple-column primary keys
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Reporter: jacob | Owner: adrian
Type: defect | Status: reopened
Priority: low | Milestone:
Component: Metasystem | Version:
Severity: normal | Resolution:
Keywords: database |
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Changes (by jacob):
* resolution: wontfix =>
* status: closed => reopened
Comment:
This is something that gets asked about a lot, so I'm going to reopen this
ticket as a place to keep track of it.
Personally I don't have time to work on this, but if the LazyWeb can work
up a patch, it would be quite nice to have. From an email I wrote a while
back, here are the issues (that I'm aware of) that would need to be solved
to make this work:
There's three basic problems in dealing with composite primary keys in
Django.
The first is that a number of APIs use "obj._meta.pk" to access the
primary key field (for example, to do "pk=whatever" lookups). A composite
PK implementation would need to emulate this in some way to avoid breaking
everything.
Second, a number of things use (content_type_id, object_pk) tuples to
refer to some object -- look at the comment framework, or the admin log
API. Again, a composite PK system would need to somehow not break this.
Finally, there's the issue of admin URLs; they're of the form
"/app_label/module_name/pk/"; there would need to be a way to map URLs to
objects in the absence of a primary key.
--
Ticket URL: <http://code.djangoproject.com/ticket/373>
Django <http://code.djangoproject.org/>
The web framework for perfectionists with deadlines.
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