Add attachemnts table to database

This commit adds a new table to the subunit2sql DB to store
attachments from the database. The schema is very simple and basically
just fk, key, blob to store the attachment, it's label and associate
it to its test_run.

Change-Id: I48fc019cef182c3bedfe62d973f2d4c70b32a6c7

doc/source/data_model.rst

@@ -65,3 +65,15 @@ Properties:
 * **stop_time**: The timestamp when the test finished executing
 * **stop_time_microsecond**: The microsecond component of the timestamp when
                              test execution finished
+
+Attachments
+-----------
+Attachemnts represent the file attachemnts in the subunit stream for a
+particular test_run.
+
+Properties:
+
+* **test_run_id**: The uuid representing the test_run the attachment is
+                   associated with.
+* **label**: The label for the attachment
+* **attachment**: The actual attachment

subunit2sql/db/models.py

@@ -125,3 +125,14 @@ class TestMetadata(BASE, SubunitBase):
     key = sa.Column(sa.String(255))
     value = sa.Column(sa.String(255))
     test_id = sa.Column(sa.String(36), sa.ForeignKey('tests.id'))
+
+
+class Attachments(BASE, SubunitBase):
+    __tablename__ = 'attachments'
+    __table_args__ = (sa.Index('ix_attachemnts_id',
+                               'test_run_id'),)
+    id = sa.Column(sa.String(36), primary_key=True,
+                   default=lambda: str(uuid.uuid4()))
+    test_run_id = sa.Column(sa.String(36))
+    label = sa.Column(sa.String(255))
+    attachment = sa.Column(sa.LargeBinary())

subunit2sql/migrations/versions/487f279b8c78_add_attachments_table.py

@@ -0,0 +1,44 @@
+# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
+#
+# 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 Attachments Table
+
+Revision ID: 487f279b8c78
+Revises: 1679b5bc102c
+Create Date: 2015-05-27 15:18:21.653867
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '487f279b8c78'
+down_revision = '1679b5bc102c'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.create_table('attachments',
+                    sa.Column('id', sa.String(36), primary_key=True,
+                              nullable=False),
+                    sa.Column('test_run_id', sa.String(36),
+                              sa.ForeignKey('test_runs.id'), nullable=False),
+                    sa.Column('label', sa.String(255)),
+                    sa.Column('attachment', sa.LargeBinary()),
+                    mysql_engine='InnoDB')
+
+
+def downgrade():
+    op.drop_table('attachments')