*_set (ForeignKey accessors) broken?
m h
into this? Any hints, suggestions?
http://code.djangoproject.com/ticket/2297
I revved to v3278 and my app broke. In my view I adjust some fields of
the model.
My model looks something like this (quite simplified)
class Foo(models.Model):
name = models.CharField(maxlength=30)
class Bar(model.Model):
foo = models.ForeignKey(Foo)
data = models.CharField(maxlength=30)
later on I iterate over my bars and try and get my foos from them. ie
for foo in bar.foo_set.all():
#do something with foo
I now get an attribute error when trying to do this:
AttributeError at /fooapp/
'Bar' object has no attribute 'foo_set'
Request Method: GET
Request URL: http://localhost:8000/fooapp/
Exception Type: AttributeError
Exception Value: 'Bar' object has no attribute 'foo_set'
Just wondering if there was a change that broke then _set functionality recently
I apologize for how vague this is. I have another model that has a
foreign key and code similar to the above still works with that. I've
briefly diffed the sources didn't chance on anything that looked to
cause this change....
-matt
Malcolm Tredinnick
> I'll just post the contents of my bug report. Has anyone else ran
> into this? Any hints, suggestions?
>
>
> http://code.djangoproject.com/ticket/2297
This isn't a bug. You are using foo_set incorrectly (it is not an
attribute on the Bar model, as the error indicates). Either bar.foo or
foo_instance.foo_set is what you want to use.
Regards,
Malcolm
m h
foo nor bar).
I have a Component object, a Version object and a Data object (that
holds additional data about the version object). They look like
this::
class Component(models.Model):
name = models.CharField(maxlenth=30)
...
class Version(models.Model):
component = models.ForeignKey(Component)
version = models.CharField(maxlength=30)
...
class Data(models.Model):
meta_data = models.CharField(maxlength=30)
version = models.ForeignKey(Version)
Now given a component, I want to get all the version instances and
alll the data associated with it. So I do something like this:
for version in component_instance.version_set.all():
for data in version.data_set.all():
#adjust meta_data on data
AttributeError at /myapp/
'Version' object has no attribute 'data_set'
Request Method: GET
Request URL: http://localhost:8000/myapp/
Exception Type: AttributeError
Exception Value: 'Version' object has no attribute 'data_set'
Exception Location: /home/matt/.views.py in _add_metadata, line 293
So this is the weird thing. Accessing _set.all() works on the
component_instance, but fails on the next line... Is _set.all() no
longer returning instances? Again, this worked before updating svn.
-matt
Curtis
After updating to the most recent version in svn, I used your example
and it works for me. Could the problem be in part of your model that
you're not showing?
In [3]: c = Component.objects.all()[0]
In [4]: for version in c.version_set.all():
...: for data in version.data_set.all():
...: print data
...:
Data object
Cheers,
-Curt