Handle manually mandatory field

wsme have a couple of bugs:
 https://bugs.launchpad.net/wsme/+bug/1227004
 https://bugs.launchpad.net/wsme/+bug/1227039

This patch workaround these bugs by doing input validation manually

Change-Id: Id16655ce4c5546b1caededad70a6b9a238e4be20

ceilometer/api/controllers/v2.py

@@ -943,8 +943,19 @@ class AlarmThresholdRule(_Base):
 
     @staticmethod
     def validate(threshold_rule):
+        #note(sileht): wsme mandatory doesn't work as expected
+        #workaround for https://bugs.launchpad.net/wsme/+bug/1227004
+        for field in ['meter_name', 'threshold']:
+            if not getattr(threshold_rule, field):
+                error = _("threshold_rule/%s is mandatory") % field
+                pecan.response.translatable_error = error
+                raise wsme.exc.ClientSideError(unicode(error))
+
+        #note(sileht): wsme default doesn't work in some case
+        #workaround for https://bugs.launchpad.net/wsme/+bug/1227039
         if not threshold_rule.query:
             threshold_rule.query = []
+
         #note(sileht): _query_to_kwargs implicitly call _sanitize_query
         #that add project_id in query
         _query_to_kwargs(threshold_rule.query, storage.SampleFilter.__init__,
@@ -1007,6 +1018,13 @@ class AlarmCombinationRule(_Base):
 
     @staticmethod
     def validate(combination_rule):
+        #note(sileht): wsme mandatory doesn't works as expected
+        #workaround for https://bugs.launchpad.net/wsme/+bug/1227004
+        if not combination_rule.alarm_ids:
+            error = _("combination_rule/alarm_ids is mandatory")
+            pecan.response.translatable_error = error
+            raise wsme.exc.ClientSideError(unicode(error))
+
         for id in combination_rule.alarm_ids:
             auth_project = acl.get_limited_to_project(pecan.request.headers)
             alarms = list(pecan.request.storage_conn.get_alarms(
@@ -1097,11 +1115,19 @@ class Alarm(_Base):
 
     @staticmethod
     def validate(alarm):
+        #note(sileht): wsme mandatory doesn't work as expected
+        #workaround for https://bugs.launchpad.net/wsme/+bug/1227004
+        for field in ['name', 'type']:
+            if not getattr(alarm, field):
+                error = _("%s is mandatory") % field
+                pecan.response.translatable_error = error
+                raise wsme.exc.ClientSideError(unicode(error))
+
         if alarm.threshold_rule and alarm.combination_rule:
             error = _("threshold_rule and combination_rule "
                       "cannot be set at the same time")
             pecan.response.translatable_error = error
-            raise wsme.exc.ClientSideError(error)
+            raise wsme.exc.ClientSideError(unicode(error))
         return alarm
 
     @classmethod

tests/api/v2/test_alarm_scenarios.py

@@ -203,6 +203,52 @@ class TestAlarms(FunctionalTest,
         self.assertEqual(one['alarm_id'], alarms[0]['alarm_id'])
         self.assertEqual(one['repeat_actions'], alarms[0]['repeat_actions'])
 
+    def test_post_alarm_wsme_workaround(self):
+        jsons = {
+            'type': {
+                'name': 'missing type',
+                'threshold_rule': {
+                    'meter_name': 'ameter',
+                    'threshold': 2.0,
+                }
+            },
+            'name': {
+                'type': 'threshold',
+                'threshold_rule': {
+                    'meter_name': 'ameter',
+                    'threshold': 2.0,
+                }
+            },
+            'threshold_rule/meter_name': {
+                'name': 'missing meter_name',
+                'type': 'threshold',
+                'threshold_rule': {
+                    'threshold': 2.0,
+                }
+            },
+            'threshold_rule/threshold': {
+                'name': 'missing threshold',
+                'type': 'threshold',
+                'threshold_rule': {
+                    'meter_name': 'ameter',
+                }
+            },
+            'combination_rule/alarm_ids': {
+                'name': 'missing alarm_ids',
+                'type': 'combination',
+                'combination_rule': {}
+            }
+        }
+        for field, json in jsons.iteritems():
+            resp = self.post_json('/alarms', params=json, expect_errors=True,
+                                  status=400, headers=self.auth_headers)
+            self.assertEqual(
+                resp.json['error_message'],
+                '{"debuginfo": null, "faultcode": "Client", "faultstring": '
+                '"%s is mandatory"}' % field)
+        alarms = list(self.conn.get_alarms())
+        self.assertEqual(4, len(alarms))
+
     def test_post_invalid_alarm_period(self):
         json = {
             'name': 'added_alarm_invalid_period',
@@ -261,6 +307,7 @@ class TestAlarms(FunctionalTest,
             'name': 'added_alarm',
             'type': 'threshold',
             'threshold_rule': {
+                'meter_name': 'ameter',
                 'query': [{'field': 'meter',
                            'value': 'ameter'}],
                 'comparison_operator': 'gt',
@@ -271,10 +318,15 @@ class TestAlarms(FunctionalTest,
 
             }
         }
-        self.post_json('/alarms', params=json, expect_errors=True, status=400,
-                       headers=self.auth_headers)
+        resp = self.post_json('/alarms', params=json, expect_errors=True,
+                              status=400, headers=self.auth_headers)
         alarms = list(self.conn.get_alarms())
         self.assertEqual(4, len(alarms))
+        self.assertEqual(
+            resp.json['error_message'],
+            '{"debuginfo": null, "faultcode": "Client", "faultstring": '
+            '"threshold_rule and combination_rule cannot '
+            'be set at the same time"}')
 
     def test_post_alarm_defaults(self):
         to_check = {