add indexes to make deleting faster

aeromancer/db/alembic/versions/a3d002d161a_add_indexes.py

@@ -0,0 +1,24 @@
+"""add indexes
+
+Revision ID: a3d002d161a
+Revises: 22e0aa22ab8e
+Create Date: 2014-11-24 14:24:29.824147
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'a3d002d161a'
+down_revision = '22e0aa22ab8e'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.create_index('file_project_idx', 'file', ['project_id'])
+    op.create_index('line_file_idx', 'line', ['file_id'])
+
+
+def downgrade():
+    op.drop_index('line_file_idx', 'line')
+    op.drop_index('file_project_idx', 'file')