HOT str_replace raises unicode exception when param is None

Hrm. Thought I could attach a trace too. Here it is if you're interested:

Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/eventlet/wsgi.py", line 384, in handle_one_response result = self.application(self.environ, start_response) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__ resp = self.call_func(req, *args, **self.kwargs) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func return self.func(req, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/heat/common/wsgi.py", line 368, in __call__ response = req.get_response(self.application) File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1296, in send application, catch_exc_info=False) File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1260, in call_application app_iter = application(self.environ, start_response) File "/usr/local/lib/python2.7/dist-packages/keystoneclient/middleware/auth_token.py", line 539, in __call__ return self.app(env, start_response) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__ resp = self.call_func(req, *args, **self.kwargs) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func return self.func(req, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/heat/common/wsgi.py", line 368, in __call__ response = req.get_response(self.application) File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1296, in send application, catch_exc_info=False) File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1260, in call_application app_iter = application(self.environ, start_response) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__ return resp(environ, start_response) File "/usr/local/lib/python2.7/dist-packages/routes/middleware.py", line 131, in __call__ response = self.app(environ, start_response) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__ return resp(environ, start_response) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__ resp = self.call_func(req, *args, **self.kwargs) File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func return self.func(req, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/heat/common/wsgi.py", line 684, in __call__ raise translate_exception(err, request.best_match_language()) StackValidationFailed_Remote: Property error : node1: user_data coercing to Unicode: need string or buffer, NoneType found Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/heat/openstack/common/rpc/amqp.py", line 461, in _process_data **args) File "/usr/lib/python2.7/dist-packages/heat/openstack/common/rpc/dispatcher.py", line 172, in dispatch result = getattr(proxyobj, method)(ctxt, **kwargs) File "/usr/lib/python2.7/dist-packages/heat/engine/service.py", line 60, in wrapped return func(self, ctx, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/heat/engine/service.py", line 273, in create_stack stack.validate() File "/usr/lib/python2.7/dist-packages/heat/engine/parser.py", line 314...

Fix proposed to branch: master
Review: https://review.openstack.org/49443

Reviewed: https://review.openstack.org/49443
Committed: http://github.com/openstack/heat/commit/0becb5f5f58b608b41e8b11d2dbb2da7e3077a5d
Submitter: Jenkins
Branch: master

commit 0becb5f5f58b608b41e8b11d2dbb2da7e3077a5d
Author: Randall Burt <email address hidden>
Date: Tue Oct 1 00:37:54 2013 -0500

    HOT str_replace default to empty string for param

    If a str_replace param cannot be resolved or is None,
    substitute an empty string in order to prevent raising
    an exception during validate.

    Closes Bug: #1234390
    Change-Id: Ica6b84cfc2157b4e1f561f737e9aa67b9f6018ca

Fix proposed to branch: milestone-proposed
Review: https://review.openstack.org/50288

Reviewed: https://review.openstack.org/50288
Committed: http://github.com/openstack/heat/commit/1a7edc6a1f660408d87cabf2569953892eb22604
Submitter: Jenkins
Branch: milestone-proposed

commit 1a7edc6a1f660408d87cabf2569953892eb22604
Author: Randall Burt <email address hidden>
Date: Tue Oct 1 00:37:54 2013 -0500

    HOT str_replace default to empty string for param

    If a str_replace param cannot be resolved or is None,
    substitute an empty string in order to prevent raising
    an exception during validate.

    Closes Bug: #1234390
    Change-Id: Ica6b84cfc2157b4e1f561f737e9aa67b9f6018ca