ProtoRPC type miss match

[protodmorgan]

I'm using Google NDB, to do a post put hook to generate a search Index. However, I am receiving the error below when it attempts to generate the document. I'm not sure why I am getting this as all my types. All the types are already in Unicode when checking the type. Unsure if this should be here or elsewhere...

GAE Standard, Py27

My Model:

class DirectionModel(ndb.Model):
    created_at = ndb.DateTimeProperty(auto_now_add=True)
    deviceId = ndb.StringProperty()
    deviceName = ndb.StringProperty()
    updated_at = ndb.DateTimeProperty(auto_now=True)
    settings = ndb.StringProperty(indexed=False)
    keywords = ndb.StringProperty(repeated=True)
    testId = ndb.StringProperty()

    def _post_put_hook(self, future):
        doc = search.Document(doc_id=self.key.id(), fields=[
            search.TextField(name='deviceId', value=self.deviceId),
            search.TextField(name='deviceName', value=self.deviceName),
            search.TextField(name='settings', value=self.settings),
            search.TextField(name='testId', value=self.testId)
        ])
        search.Index('cookingDirections').put(doc)

Encountered unexpected error from ProtoRPC method implementation: TypeError (coercing to Unicode: need string or buffer, long found) (/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/protorpc-1.0/protorpc/wsgi/service.py:191)
Traceback (most recent call last):
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/protorpc-1.0/protorpc/wsgi/service.py", line 181, in protorpc_service_app
    response = method(instance, request)
  File "/base/data/home/apps/s~hyperwave-168417/cookingdirections:20180309t143359.408189414954364822/lib/endpoints/api_config.py", line 1272, in invoke_remote
    return remote_method(service_instance, request)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/third_party/protorpc-1.0/protorpc/remote.py", line 414, in invoke_remote_method
    response = method(service_instance, request)
  File "/base/data/home/apps/s~hyperwave-168417/cookingdirections:20180309t143359.408189414954364822/main.py", line 135, in create
    keywords=keywords.split(',')).put()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 3458, in _put
    return self._put_async(**ctx_options).get_result()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 383, in get_result
    self.check_success()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 378, in check_success
    self.wait()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 362, in wait
    if not ev.run1():
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/eventloop.py", line 268, in run1
    delay = self.run0()
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/eventloop.py", line 230, in run0
    callback(*args, **kwds)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 533, in _on_future_completion
    self._help_tasklet_along(ns, ds_conn, gen, val)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 444, in _help_tasklet_along
    self.set_result(result)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 327, in set_result
    callback(*args, **kwds)
  File "/base/data/home/apps/s~hyperwave-168417/cookingdirections:20180309t143359.408189414954364822/main.py", line 59, in _post_put_hook
    search.TextField(name='testId', value=unicode(self.testId))
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/api/search/search.py", line 1926, in __init__
    doc_id = _ConvertToUnicode(doc_id)
  File "/base/alloc/tmpfs/dynamic_runtimes/python27/a7637d5531ec9deb_unzipped/python27_lib/versions/1/google/appengine/api/search/search.py", line 247, in _ConvertToUnicode
    return unicode(some_string, 'utf-8')
TypeError: coercing to Unicode: need string or buffer, long found