Support subscription to worklists in the API

This doesn't yet cause notifications to be recieved for changes to
worklists. That can be a change for a later patch, and should be
configurable.

Change-Id: I14b0b4ddd6138ac23f9e1c10d0de2419f8e8cb4b

storyboard/db/api/subscriptions.py

@@ -26,7 +26,8 @@ SUPPORTED_TYPES = {
     'project': models.Project,
     'project_group': models.ProjectGroup,
     'story': models.Story,
-    'task': models.Task
+    'task': models.Task,
+    'worklist': models.Worklist
 }
 
 

storyboard/db/migration/alembic_migrations/versions/058_allow_subscription_to_worklists.py

@@ -0,0 +1,46 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+
+"""Allow subscription to worklists
+
+Revision ID: 058
+Revises: 057
+Create Date: 2016-06-01 13:28:19.033906
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '058'
+down_revision = '057'
+
+
+from alembic import op
+import sqlalchemy as sa
+
+old_type_enum = sa.Enum('task', 'story', 'project', 'project_group')
+new_type_enum = sa.Enum(
+    'task', 'story', 'project', 'project_group', 'worklist')
+
+
+def upgrade(active_plugins=None, options=None):
+    op.alter_column('subscriptions',
+                    'target_type',
+                    existing_type=old_type_enum,
+                    type_=new_type_enum)
+
+
+def downgrade(active_plugins=None, options=None):
+    op.alter_column('subscriptions',
+                    'target_type',
+                    existing_type=new_type_enum,
+                    type_=old_type_enum)

storyboard/db/models.py

@@ -511,7 +511,8 @@ class Comment(FullText, ModelBuilder, Base):
 # Subscription and notifications
 
 class Subscription(ModelBuilder, Base):
-    _SUBSCRIPTION_TARGETS = ('task', 'story', 'project', 'project_group')
+    _SUBSCRIPTION_TARGETS = ('task', 'story', 'project', 'project_group',
+                             'worklist')
 
     user_id = Column(Integer, ForeignKey('users.id'))
     target_type = Column(Enum(*_SUBSCRIPTION_TARGETS))