These are the database objects used while finding the regression range. 1/3

appengine/findit/model/base_analysis.py

Index: appengine/findit/model/base_analysis.py
diff --git a/appengine/findit/model/base_analysis.py b/appengine/findit/model/base_analysis.py
new file mode 100644
index 0000000000000000000000000000000000000000..cf54b4685cffc8b4743292f9e69befce13078cc4
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+++ b/appengine/findit/model/base_analysis.py
@@ -0,0 +1,46 @@
+# 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
+
+from model import analysis_status
+
+
+class BaseAnalysis(ndb.Model):
+  """Represents a build analysis of a builder in a Chromium waterfall."""
+
+  @property
+  def completed(self):
+    return self.status in (
+        analysis_status.COMPLETED, analysis_status.ERROR)
+
+  @property
+  def duration(self):
+    if not self.completed or not self.end_time or not self.start_time:
+      return None
+    return int((self.end_time - self.start_time).total_seconds())
+
+  @property
+  def failed(self):
+    return self.status == analysis_status.ERROR
+
+  @property
+  def status_description(self):
+    return analysis_status.STATUS_TO_DESCRIPTION.get(self.status, 'Unknown')
+
+  # The url path to the pipeline status page.
+  pipeline_status_path = ndb.StringProperty(indexed=False)
+
+  # The status of the analysis.
+  status = ndb.IntegerProperty(default=analysis_status.PENDING, indexed=False)
+  # When the analysis was requested.
+  request_time = ndb.DateTimeProperty(indexed=False)
+  # When the analysis actually started.
+  start_time = ndb.DateTimeProperty(indexed=False)
+  # When the analysis actually ended.
+  end_time = ndb.DateTimeProperty(indexed=False)
+  # When the analysis was updated.
+  updated_time = ndb.DateTimeProperty(indexed=False, auto_now=True)
+  # Record which version of analysis.
+  version = ndb.StringProperty(indexed=False)