fix: create separate triggers for insert/update

backend/src/db/migrations/utils/kmsKeySlugNameTransition.ts

@@ -7,29 +7,49 @@ import { TableName } from "@app/db/schemas";
 
 // this is a postgres function to keep name in-sync with slug during transition period
 export const createKmsKeyNameSyncTrigger = async (knex: Knex) => {
-  // create function
+  // function to update name if slug is updated
   await knex.raw(`
-        CREATE OR REPLACE FUNCTION on_sync_kms_key_name() RETURNS TRIGGER AS $$ BEGIN NEW."name" = NEW."slug";
+        CREATE OR REPLACE FUNCTION on_update_kms_key_slug() RETURNS TRIGGER AS $$ BEGIN NEW."name" = NEW."slug";
         RETURN NEW;
         END;
         $$ LANGUAGE plpgsql;
     `);
 
-  // create trigger
+  // function to set name if kms key created with slug
   await knex.raw(`
-        CREATE TRIGGER "${TableName.KmsKey}_name_sync"
+        CREATE OR REPLACE FUNCTION on_insert_kms_key() RETURNS TRIGGER AS $$ BEGIN NEW."name" = coalesce(NEW."name", NEW."slug");
-        BEFORE INSERT OR UPDATE OF "slug" ON ${TableName.KmsKey}
+        RETURN NEW;
+        END;
+        $$ LANGUAGE plpgsql;
+    `);
+
+  // create trigger to update name if slug is updated
+  await knex.raw(`
+        CREATE TRIGGER "${TableName.KmsKey}_update_name"
+        BEFORE UPDATE OF "slug" ON ${TableName.KmsKey}
         FOR EACH ROW
-        EXECUTE PROCEDURE on_sync_kms_key_name();
+        EXECUTE PROCEDURE on_update_kms_key_slug();
+    `);
+
+  // create trigger to set name if key created with slug
+  await knex.raw(`
+        CREATE TRIGGER "${TableName.KmsKey}_set_name"
+        BEFORE INSERT ON ${TableName.KmsKey}
+        FOR EACH ROW
+        EXECUTE PROCEDURE on_insert_kms_key();
     `);
 };
 
 export const dropKmsKeyNameSyncTrigger = async (knex: Knex) => {
-  // drop trigger
+  // drop triggers
-  await knex.raw(`DROP TRIGGER IF EXISTS "${TableName.KmsKey}_name_sync" ON ${TableName.KmsKey}`);
+  await knex.raw(`DROP TRIGGER IF EXISTS "${TableName.KmsKey}_update_name" ON ${TableName.KmsKey}`);
+  await knex.raw(`DROP TRIGGER IF EXISTS "${TableName.KmsKey}_set_name" ON ${TableName.KmsKey}`);
 
-  // drop function
+  // drop functions
   await knex.raw(`
-        DROP FUNCTION IF EXISTS on_sync_kms_key_name() CASCADE;
+        DROP FUNCTION IF EXISTS on_update_kms_key_slug() CASCADE;
+    `);
+  await knex.raw(`
+        DROP FUNCTION IF EXISTS on_insert_kms_key() CASCADE;
     `);
 };