Upgrade schema to store organisations clusters

migrations/versions/20170209144136_create_organisations_clusters_table.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'db02d759783f'
+down_revision = u'f35805a0a00f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table('organisation_clusters',
+
+        sa.Column('canonical', sa.Text),
+        sa.Column('variations', sa.ARRAY(sa.Text)),
+
+    )
+
+
+def downgrade():
+    op.drop_table('organisation_clusters')