Allow TOs to be deleted, along with their associated CLINs

alembic/versions/fda6bd7e1b65_clin_delete_cascade.py

@@ -0,0 +1,26 @@
+"""clin delete cascade
+
+Revision ID: fda6bd7e1b65
+Revises: e0c6eb21771f
+Create Date: 2019-08-07 16:37:02.451277
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'fda6bd7e1b65'
+down_revision = 'e0c6eb21771f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_constraint("clins_task_order_id_fkey", "clins")
+    op.create_foreign_key("clins_task_order_id_fkey", "clins", "task_orders", ["task_order_id"], ["id"], ondelete="cascade")
+
+
+def downgrade():
+    op.drop_constraint("clins_task_order_id_fkey", "clins")
+    op.create_foreign_key("clins_task_order_id_fkey", "clins", "task_orders", ["task_order_id"], ["id"], ondelete="no action")