Other fields required when trying to Add/Delete from a set

[dlg]

If I call update_item(attrib, value, action='ADD'), I get an error that an un-related field can't be None. As I read the docs, I only need to set the field I'm updating.

...
user.update_item('attribute_to_update', user_id, action='add')
File "/Users/danielgould/.virtualenvs/tmp_test/lib/python2.7/site-packages/pynamodb/models.py", line 320, in update_item
args, kwargs = self._get_save_args()
File "/Users/danielgould/.virtualenvs/tmp_test/lib/python2.7/site-packages/pynamodb/models.py", line 833, in _get_save_args
serialized = self._serialize(null_check=null_check)
File "/Users/danielgould/.virtualenvs/tmp_test/lib/python2.7/site-packages/pynamodb/models.py", line 994, in _serialize
raise ValueError("Attribute '{0}' cannot be None".format(attr.attr_name))
ValueError: Attribute 'other_attrib' cannot be None

[jlafon]

I'm trying to reproduce this but can't. Can you provide the model definition? I specifically test for this functionality here (model definition here). Thanks.

[jlafon]

Also, what version of PynamoDB are you using?

[dlg]

Thanks for taking a look.

I'm using

boto==2.32.1
pynamodb==1.3.2

I sent you some code off-list. Thanks so much.

[jlafon]

Hi there. I think I've fixed the issue. Can you install from the devel branch on GitHub and retry?

$ pip install git+https://github.com/jlafon/PynamoDB.git@devel#egg=pynamodb

[dlg]

Thanks. In my code I changed
user.update_item('attribute_to_update', user_id, action='add')
to
user.update_item('attribute_to_update', [user_id], action='add')
and the test passed. I'll double-check but I think you got it.

Really appreciate it.

[jlafon]

Glad to hear it. I'll cut a new release soon including this and a few other fixes.