update null sign id values to direct sighting

database/src/migrations/20240923161500_update_obs_sign_id.ts

@@ -0,0 +1,23 @@
+import { Knex } from 'knex';
+
+/**
+ * Bug fix:
+ * Observation subcount sign id cannot be null, so this updates observation subcount records to change null values to 'direct sighting'.
+ *
+ * @export
+ * @param {Knex} knex
+ * @return {*}  {Promise<void>}
+ */
+export async function up(knex: Knex): Promise<void> {
+  await knex.raw(`--sql
+    SET SEARCH_PATH=biohub;
+
+    UPDATE observation_subcount
+    SET observation_subcount_sign_id = (SELECT observation_subcount_sign_id FROM observation_subcount_sign WHERE lower(name) = 'direct sighting')
+    WHERE observation_subcount_sign_id IS NULL;
+  `);
+}
+
+export async function down(knex: Knex): Promise<void> {
+  await knex.raw(``);
+}