Assign delivery_status type to existing callbacks

migrations/versions/0206_assign_callback_type.py

@@ -0,0 +1,21 @@
+"""
+
+Revision ID: 0206_assign_callback_type
+Revises: 0205_service_callback_type
+Create Date: 2018-07-18 10:43:43.864835
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = '0206_assign_callback_type'
+down_revision = '0205_service_callback_type'
+
+
+def upgrade():
+    op.execute("update service_callback_api set callback_type = 'delivery_status' where callback_type is null")
+
+
+def downgrade():
+    pass