basic workspace model and repository implementation

alembic/versions/4be312655ceb_add_workspaces_table.py

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+"""add workspaces table
+
+Revision ID: 4be312655ceb
+Revises: 05d6272bdb43
+Create Date: 2018-08-16 09:25:19.888549
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '4be312655ceb'
+down_revision = '05d6272bdb43'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('workspaces',
+    sa.Column('id', postgresql.UUID(as_uuid=True), server_default=sa.text('uuid_generate_v4()'), nullable=False),
+    sa.Column('request_id', postgresql.UUID(as_uuid=True), nullable=False),
+    sa.Column('task_order_id', sa.Integer(), nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.ForeignKeyConstraint(['request_id'], ['requests.id'], ),
+    sa.ForeignKeyConstraint(['task_order_id'], ['task_order.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('name')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('workspaces')
+    # ### end Alembic commands ###