#6706: updating inherited models does not work
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Reporter: dcwatson | Owner: nobody
Status: new | Component: Database wrapper
Version: queryset-refactor | Keywords: model inheritance update
Stage: Unreviewed | Has_patch: 0
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Saving initial instances of inherited models works as expected. However,
when trying to update a field, a `FieldDoesNotExist` exception is thrown.
For example, assume the following models:
{{{
class Location (models.Model):
name = models.CharField( max_length=100 )
class PersonInfo (models.Model):
first_name = models.CharField( max_length=100 )
last_name = models.CharField( max_length=100 )
class Employer (PersonInfo):
title = models.CharField( max_length=100 )
office = models.ForeignKey( Location, related_name='employers' )
}}}
Then try the following:
{{{
office = Location( name='The Office' )
office.save()
boss = Employer( first_name='Dan', last_name='Watson', title='Boss',
office=office )
boss.save()
# the following will break
boss.title = 'Some Other Title'
boss.save()
}}}
This is the traceback I get:
{{{
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/dcwatson/python_packages/django/db/models/base.py", line
268, in save
self.save(raw, parent)
File "/home/dcwatson/python_packages/django/db/models/base.py", line
286, in save
manager.filter(pk=pk_val).update(**dict(values))
File "/home/dcwatson/python_packages/django/db/models/query.py", line
258, in update
query.add_update_values(kwargs)
File
"/home/dcwatson/python_packages/django/db/models/sql/subqueries.py", line
210, in add_update_values
field, model, direct, m2m = self.model._meta.get_field_by_name(name)
File "/home/dcwatson/python_packages/django/db/models/options.py", line
253, in get_field_by_name
% (self.object_name, name))
FieldDoesNotExist: PersonInfo has no field named 'office'
}}}
--
Ticket URL: <http://code.djangoproject.com/ticket/6706>
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