json error with pyral trying to update collections ( addCollectionItems )

[Eduardo Duran]

I'm getting a json error when trying to add a tag in a PortfolioItem with the addCollectionItems. Code below.

USAGE = """\
Usage: python addtags.py <Feature_id> <tag_name> <tag_name> <tag_name>...
"""

Feature_id = args.pop(0)
tag_names = args[:]
tags = []
response = rally.get('Tag', fetch=True, order="Name", server_ping=False, isolated_workspace=True)
for tag in response:
if tag.Name in tag_names:
tags.append(tag)

Feature = rally.get("Feature", fetch="FormattedID,Name,Description,Tags,_type",
query="FormattedID = %s" % Feature_id, server_ping=False, isolated_workspace=True, instance=True)
Feature_tags = [str(tag.Name) for tag in Feature.Tags]
print("Preexsisting tags : ",Feature_tags)

adds = rally.addCollectionItems(Feature, tags)

I get this error :

Traceback (most recent call last):
File "/ws/eduran-ott/vpython/lib/python3.5/site-packages/pyral/rallyresp.py", line 124, in __init__
self.content = response.json()
File "/ws/eduran-ott/vpython/lib/python3.5/site-packages/requests/models.py", line 897, in json
return complexjson.loads(self.text, **kwargs)
File "/sw/packages/python3/3.5.0/lib/python3.5/json/__init__.py", line 319, in loads
return _default_decoder.decode(s)
File "/sw/packages/python3/3.5.0/lib/python3.5/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/sw/packages/python3/3.5.0/lib/python3.5/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "./add.tag.py", line 102, in <module>
main(sys.argv[1:])
File "./add.tag.py", line 69, in main
adds = rally.addCollectionItems(Feature, tags)
File "/ws/eduran-ott/vpython/lib/python3.5/site-packages/pyral/restapi.py", line 1219, in addCollectionItems
response = RallyRESTResponse(self.session, context, resource, response, "shell", 0)
File "/ws/eduran-ott/vpython/lib/python3.5/site-packages/pyral/rallyresp.py", line 127, in __init__
raise RallyResponseError(problem)
pyral.rallyresp.RallyResponseError: Response for request: PortfolioItem/388668889576/Tags/add either was not JSON content or was an invalidly formed/incomplete JSON structure

Any help is really appreciated.

[Eduardo Duran]

(update) I was able to update the Tags of the portfolioItem using rally.update

seems my mistake was to confuse Tags as collection items (so the use of addCollectionItems is not appropriate)

this does work

updateDict = {
'FormattedID': Feature_id,
'Tags': tags,
}
rally.update('Feature', updateDict)