Showing correctly errors from API

-showing errors that API throw in stack-create action, there
 are lot of possible errors that needs to be exposed to the
 user
-fixed worklow actions contributions to correct ones

Change-Id: I0a352d0aac814864da1f40de05d1f91dc5ed9630

tuskar_ui/api.py

@@ -210,10 +210,7 @@ class Overcloud(base.APIResourceWrapper):
         # state of all inner entities and operations correctly.
         # Then also delete the try/except, it should not be caught on this
         # level.
-        try:
         return heat.stack_get(self._request, 'overcloud')
-        except heatclient.exc.HTTPNotFound:
-            return None
 
     @cached_property
     def stack_events(self):

tuskar_ui/infrastructure/overcloud/workflows/undeployed.py

@@ -11,9 +11,9 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-
+from django.core import exceptions as django_exceptions
 from django.utils.translation import ugettext_lazy as _
-from horizon import exceptions
+
 import horizon.workflows
 
 from tuskar_ui import api
@@ -33,11 +33,14 @@ class Workflow(horizon.workflows.Workflow):
     success_url = 'horizon:infrastructure:overcloud:index'
 
     def handle(self, request, context):
-        success = True
         try:
             api.Overcloud.create(self.request, context['role_counts'],
                                  context['configuration'])
-        except Exception:
-            success = False
-            exceptions.handle(request, _('Unable to start deployment.'))
-        return success
+        except Exception as e:
+            # Showing error in both workflow tabs, because from the exception
+            # type we can't recognize where it should show
+            self.add_error_to_step(unicode(e), 'undeployed_overview')
+            self.add_error_to_step(unicode(e), 'deployed_configuration')
+            raise django_exceptions.ValidationError(unicode(e))
+
+        return True

tuskar_ui/infrastructure/overcloud/workflows/undeployed_configuration.py

@@ -260,12 +260,12 @@ class Action(horizon.workflows.Action):
         for name, data in parameters:
             self.fields[name] = make_field(name, **data)
 
-    def handle(self, request, context):
-        context['configuration'] = self.cleaned_data
-        return context
-
 
 class Step(horizon.workflows.Step):
     action_class = Action
     contributes = ('configuration',)
     template_name = 'infrastructure/overcloud/undeployed_configuration.html'
+
+    def contribute(self, data, context):
+        context['configuration'] = data
+        return context

tuskar_ui/infrastructure/overcloud/workflows/undeployed_overview.py

@@ -90,16 +90,6 @@ class Action(horizon.workflows.Action):
                     _("Can't deploy nodes without a node profile assigned."))
         return self.cleaned_data
 
-    def handle(self, request, context):
-        counts = {}
-        for key, value in self.cleaned_data.iteritems():
-            if not key.startswith('count_'):
-                continue
-            count, role_id, profile = key.split('__', 2)
-            counts[role_id, profile] = int(value)
-        context['role_counts'] = counts
-        return context
-
 
 class Step(horizon.workflows.Step):
     action_class = Action
@@ -110,3 +100,13 @@ class Step(horizon.workflows.Step):
     def get_free_nodes(self):
         """Get the count of nodes that are not assigned yet."""
         return len(api.Node.list(self.workflow.request, False))
+
+    def contribute(self, data, context):
+        counts = {}
+        for key, value in data.iteritems():
+            if not key.startswith('count_'):
+                continue
+            count, role_id, profile = key.split('__', 2)
+            counts[role_id, profile] = int(value)
+        context['role_counts'] = counts
+        return context