change name of request relationship to legacy task order

alembic/versions/1c1394e496a7_change_request_foreign_key_to_task_order.py

@@ -0,0 +1,32 @@
+"""change request foreign key to task order
+
+Revision ID: 1c1394e496a7
+Revises: 3dc8b7961bd1
+Create Date: 2018-12-12 14:39:25.325640
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '1c1394e496a7'
+down_revision = '3dc8b7961bd1'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column("requests", "task_order_id", new_column_name="legacy_task_order_id")
+    op.drop_constraint('requests_task_order_id_fkey', 'requests', type_='foreignkey')
+    op.create_foreign_key("requests_legacy_task_order_fkey", 'requests', 'legacy_task_orders', ['legacy_task_order_id'], ['id'])
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column("requests", "legacy_task_order_id", new_column_name="task_order_id")
+    op.drop_constraint("requests_legacy_task_order_fkey" 'requests', type_='foreignkey')
+    op.create_foreign_key('requests_task_order_id_fkey', 'requests', 'legacy_task_orders', ['task_order_id'], ['id'])
+    # ### end Alembic commands ###