CORE-1906: automatically delete job steps when the corresponding job …

…is deleted

migrations/000036_job_steps_fkey.down.sql

@@ -0,0 +1,19 @@
+BEGIN;
+
+SET search_path = public, pg_catalog;
+
+--
+-- Remove the foreign key if it already exists.
+--
+ALTER TABLE IF EXISTS job_steps
+    DROP CONSTRAINT job_steps_job_id_fkey;
+
+--
+-- Add the foreign key back to the table without the cascade.
+--
+ALTER TABLE IF EXISTS job_steps
+    ADD CONSTRAINT job_steps_job_id_fkey
+    FOREIGN KEY (job_id)
+    REFERENCES jobs (id);
+
+COMMIT;

migrations/000036_job_steps_fkey.up.sql

@@ -0,0 +1,19 @@
+BEGIN;
+
+SET search_path = public, pg_catalog;
+
+--
+-- Remove the foreign key if it already exists.
+--
+ALTER TABLE IF EXISTS job_steps
+DROP CONSTRAINT job_steps_job_id_fkey;
+
+--
+-- Add the foreign key back to the table with the cascade.
+--
+ALTER TABLE IF EXISTS job_steps
+ADD CONSTRAINT job_steps_job_id_fkey
+FOREIGN KEY (job_id)
+REFERENCES jobs (id) ON DELETE CASCADE;
+
+COMMIT;