[Needs backend] Couchdb backend for integration with Ubuntu One

I have implemented a Desktop CouchDB backend for GTG that enables UbuntuOne synchronization. It's included in the attached branch.

Any suggestions on how to test this? i.e. is any setup needed? I've got two computers and an UbuntuOne account.

To test the CouchDB backend in this branch, edit ~/.local/share/gtg/projects.xml and change the backend tag so that the value of the module attribute is "couchdb". The next time you open GTG, it will automatically start using the CouchDB backend. If you have UbuntuOne synchronization enabled on your computer, your tasks will be synchronized automatically.

Please note that the program will *not* import your existing tasks into CouchDB. It will leave your existing notes intact on the filesystem.

There's one merge conflict at http://bazaar.launchpad.net/%7Egtg/gtg/trunk/annotate/head%3A/GTG/core/__init__.py#L125

...and I get the following error when creating a new task with the fuzzy due date (later, now, soon) or no due date:

Exception in thread Thread-6:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.6/threading.py", line 477, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/khaeru/Projects/gtg/GTG/core/datastore.py", line 280, in __write
    self.backend.set_task(task)
  File "/home/khaeru/Projects/gtg/GTG/backends/couchdb.py", line 47, in set_task
    self.database.put_record(rec)
  File "/usr/lib/python2.6/dist-packages/desktopcouch/records/server_base.py", line 155, in put_record
    self.db[record_id] = record_data
  File "/usr/lib/pymodules/python2.6/couchdb/client.py", line 327, in __setitem__
    resp, data = self.resource.put(id, content=content)
  File "/usr/lib/pymodules/python2.6/couchdb/client.py", line 989, in put
    **params)
  File "/usr/lib/pymodules/python2.6/couchdb/client.py", line 1000, in _request
    body = json.encode(content).encode('utf-8')
  File "/usr/lib/pymodules/python2.6/couchdb/json.py", line 66, in encode
    return _encode(obj)
  File "/usr/lib/pymodules/python2.6/couchdb/json.py", line 114, in <lambda>
    dumps(obj, allow_nan=False, ensure_ascii=False)
  File "/usr/lib/pymodules/python2.6/simplejson/__init__.py", line 237, in dumps
    **kw).encode(obj)
  File "/usr/lib/pymodules/python2.6/simplejson/encoder.py", line 200, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/pymodules/python2.6/simplejson/encoder.py", line 260, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/pymodules/python2.6/simplejson/encoder.py", line 177, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <GTG.tools.dates.NoDate object at 0xa36e0cc> is not JSON serializable

I've attached a branch which brings this function into sync with the current state of GTG.

i could not get the data to sync:

1 On my desktop i branched the foxxtrot`s code, changed settings in project.xml, started the aplication and added 3 tasks. i have ubuntu one running.
2 On my laptop i branched foxxtrot, stuff, changed settings in project.xml, started the aplication and waited.. no sync.
3 I logged in to ubuntu one website on desktop and laptop. no change.
4 i checked if my local client of "ubuntu one" is running on desktop and laptop. it did.
5 i restarted ./gtg and still no data on laptop.
6 changed to segphault branch, still no change.

Will this Couchdb backend replace the current not scalable XML local backend?

We still have to gauge its performances. The gwibber people have told me that they are having speed issues with couchdb. We will see.

So, if the performance problems of Couchdb are fixed, will the Couchdb backend replace the current not scalable XML local backend? or will you substitute it with another scalable backend like SQLite?

Whether you work on this task?

Seems this bug is no longer even feasible:
"EOL for couchdb and desktopcouch" https://lists.ubuntu.com/archives/ubuntu-desktop/2011-November/003474.html

Closing as invalid.