#13155: Iteration of a Many To Many Relationship raises Field Error
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Reporter: callen | Owner: nobody
Status: closed | Milestone:
Component: Database layer (models, ORM) | Version: 1.1
Resolution: duplicate | Keywords: m2m, orm,
field error
Stage: Unreviewed | Has_patch: 0
Needs_docs: 0 | Needs_tests: 0
Needs_better_patch: 0 |
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Changes (by russellm):
* status: reopened => closed
* resolution: => duplicate
Comment:
I'm going to call this a strange presentation of #10405.
If I'm understanding the extremely verbose reproduction instructions, the
root of this problem is a model that is referenced in a m2m that belongs
to an app that isn't (due to some configuration problem) included in
INSTALLED_APPS. Using shell_plus seems to change the way the problem
manifests, but using similar conditions and a normal shell, I get "'str'
object has no attribute '_default_manager'" errors, which is the
presentation under #10405.
I would also note that this particular error case is caught by manage.py
validate. You can't use runserver, syncdb, or most of the other management
commands without triggering a validation error if you have an m2m to a
model in an app that isn't in INSTALLED_APPS.
If I'm misunderstood the root cause here, a *terse* set of reproduction
instructions -- preferably that doesn't involve shell_plus -- would be
helpful.
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Ticket URL: <http://code.djangoproject.com/ticket/13155#comment:11>
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