Add description field to executions_v2 table

Partially Implements: blueprint mistral-execution-description

Change-Id: I3ecb9c0a76c9d1244e14359e41d57e269a681b1b

mistral/db/sqlalchemy/migration/alembic_migrations/versions/004_add_description_for_execution.py

@@ -0,0 +1,36 @@
+# Copyright 2015 OpenStack Foundation.
+#
+# 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.
+
+"""add description for execution
+
+Revision ID: 004
+Revises: 003
+Create Date: 2015-06-10 14:23:54.494596
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '004'
+down_revision = '003'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column(
+        'executions_v2',
+        sa.Column('description', sa.String(length=255), nullable=True)
+    )

mistral/db/v2/sqlalchemy/models.py

@@ -95,6 +95,7 @@ class Execution(mb.MistralSecureModelBase):
     # Main properties.
     id = mb.id_column()
     name = sa.Column(sa.String(80))
+    description = sa.Column(sa.String(255), nullable=True)
 
     workflow_name = sa.Column(sa.String(80))
     spec = sa.Column(st.JsonDictType())

mistral/tests/unit/db/v2/test_sqlalchemy_db_api.py

@@ -709,7 +709,8 @@ WF_EXECS = [
         'updated_at': None,
         'context': None,
         'task_id': None,
-        'trust_id': None
+        'trust_id': None,
+        'description': None,
     },
     {
         'spec': {},
@@ -720,7 +721,8 @@ WF_EXECS = [
         'updated_at': None,
         'context': {'image_id': '123123'},
         'task_id': None,
-        'trust_id': None
+        'trust_id': None,
+        'description': None,
     }
 ]