#13781: select_related and multiple inheritance
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Reporter: | Owner: nobody
shauncutts | Status: reopened
Type: Bug | Component: Database layer
Milestone: | (models, ORM)
Version: 1.2 | Severity: Normal
Resolution: | Keywords:
Triage Stage: Accepted | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
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Changes (by srmerritt):
* cc: srmerritt (added)
* easy: => 0
Comment:
I am getting a separate error from the same issue (select_related failing
to handle multiple inheritance), in v1.2.
My traceback looks like this:
* /django/db/models/query.py", line 335, in get\n num = len(clone)\n',
* /django/db/models/query.py", line 80, in __len__\n
self._result_cache = list(self.iterator())\n',
* /django/db/models/query.py", line 273, in iterator\n
only_load=only_load)\n',
* /django/db/models/query.py", line 1279, in get_cached_row\n
setattr(rel_obj, rel_field.attname, getattr(obj, rel_field.attname))\n',
And my error is of this format: AttributeError: "'Parent2' object has no
attribute 'Parent1Attribute'". This section of get_cached_row clearly
assumes it is dealing with single inheritance, whereas in my case 'obj' is
not an instance of 'rel_model'.
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Ticket URL: <http://code.djangoproject.com/ticket/13781#comment:8>
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