db schema improvements: description is set to text

Helps to capture more details about vim, device and its template.

Change-Id: Ic3aa4ad61e4ba9beb2fca63ef722bf30be9e06ba
Closes-bug: #1587579

tacker/db/migration/alembic_migrations/versions/HEAD

@@ -1 +1 @@
-6e56d4474b2a
+c7cde2f45f82

tacker/db/migration/alembic_migrations/versions/c7cde2f45f82_set_description_to_text.py

@@ -0,0 +1,41 @@
+# Copyright 2016 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.
+#
+
+"""set-description-to-text
+
+Revision ID: c7cde2f45f82
+Revises: 6e56d4474b2a
+Create Date: 2016-06-01 10:58:43.022668
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'c7cde2f45f82'
+down_revision = '6e56d4474b2a'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade(active_plugins=None, options=None):
+    op.alter_column('vims',
+                    'description',
+                    type_=sa.Text)
+    op.alter_column('devices',
+                    'description',
+                    type_=sa.Text)
+    op.alter_column('devicetemplates',
+                    'description',
+                    type_=sa.Text)

tacker/db/nfvo/nfvo_db.py

@@ -39,7 +39,7 @@ VIM_AUTH_ATTRIBUTES = ('auth_url', 'vim_project', 'password', 'auth_cred')
 class Vim(model_base.BASE, models_v1.HasId, models_v1.HasTenant):
     type = sa.Column(sa.String(255), nullable=False)
     name = sa.Column(sa.String(255), nullable=True)
-    description = sa.Column(sa.String(255), nullable=True)
+    description = sa.Column(sa.Text, nullable=True)
     placement_attr = sa.Column(types.Json, nullable=True)
     shared = sa.Column(sa.Boolean, default=True, server_default=sql.true(
     ), nullable=False)

tacker/db/vm/vm_db.py

@@ -47,7 +47,7 @@ class DeviceTemplate(model_base.BASE, models_v1.HasId, models_v1.HasTenant):
 
     # Descriptive name
     name = sa.Column(sa.String(255))
-    description = sa.Column(sa.String(255))
+    description = sa.Column(sa.Text)
 
     # service type that this service vm provides.
     # At first phase, this includes only single service
@@ -99,7 +99,7 @@ class Device(model_base.BASE, models_v1.HasId, models_v1.HasTenant):
     template = orm.relationship('DeviceTemplate')
 
     name = sa.Column(sa.String(255), nullable=True)
-    description = sa.Column(sa.String(255), nullable=True)
+    description = sa.Column(sa.Text, nullable=True)
 
     # sufficient information to uniquely identify hosting device.
     # In case of service VM, it's UUID of nova VM.