[Findit] Pipeline change to save suspected cls to data store.

appengine/findit/model/wf_suspected_cl.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from google.appengine.ext import ndb
 
 
 class WfSuspectedCL(ndb.Model):
   """Represents suspected cl that causes failures on Chromium waterfall builds.
 
@@ skipping 10 matching lines @@
   # Might not be available for some repo.
   commit_position = ndb.IntegerProperty(indexed=False)
 
   # The list of builds in which the suspected CL caused some breakage.
   builds = ndb.JsonProperty(indexed=False)
 
   # Is the suspected CL the culprit or not.
   is_culprit = ndb.BooleanProperty(indexed=True, default=None)
 
   # From which approach do we get this suspected CL: HEURISTIC, TRY_JOB or BOTH.
-  approach = ndb.IntegerProperty(indexed=True)
+  approach = ndb.IntegerProperty(indexed=True, default=None)
 
   # Failure type: failure_type.COMPILE or failure_type.TEST.
   failure_type = ndb.IntegerProperty(indexed=True)
 
   @property
   def project_name(self):
     return self.repo_name
 
   @classmethod
   def _CreateKey(cls, repo_name, revision):  # pragma: no cover
     return ndb.Key(cls.__name__, '%s/%s' % (repo_name, revision))
 
   @classmethod
   def Create(cls, repo_name, revision, commit_position):  # pragma: no cover
     instance = cls(key=cls._CreateKey(repo_name, revision))
     instance.repo_name = repo_name
     instance.revision = revision
     instance.commit_position = commit_position
     instance.builds = []
     return instance
 
   @classmethod
   def Get(cls, repo_name, revision):  # pragma: no cover
     return cls._CreateKey(repo_name, revision).get()