add a migration to catalog-backend to alter target column of locations table to type text

Signed-off-by: Kashish Mittal <kmittal@redhat.com>

plugins/catalog-backend/migrations/20200511113813_init.js

@@ -36,7 +36,7 @@ exports.up = async function up(knex) {
           .comment('Auto-generated ID of the location');
         table.string('type').notNullable().comment('The type of location');
         table
-          .text('target')
+          .string('target')
           .notNullable()
           .comment('The actual target of the location');
       })

plugins/catalog-backend/migrations/20241003170511_alter_target_in_locations.js

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// @ts-check
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = async function up(knex) {
+  await knex.schema.alterTable('locations', table => {
+    table.text('target').alter();
+  });
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = async function down(knex) {
+  await knex.schema.alterTable('locations', table => {
+    table.string('target').alter();
+  });
+};

plugins/catalog-backend/src/tests/migrations.test.ts

@@ -308,4 +308,26 @@ describe('migrations', () => {
       await knex.destroy();
     },
   );
+
+  it.each(databases.eachSupportedId())(
+    '20241003170511_alter_target_in_locations.js, %p',
+    async databaseId => {
+      const knex = await databases.init(databaseId);
+
+      await migrateUntilBefore(
+        knex,
+        '20241003170511_alter_target_in_locations.js',
+      );
+
+      await migrateUpOnce(knex);
+      const columnInfo = await knex('locations').columnInfo();
+      expect(columnInfo.target.type).toBe('text');
+
+      await migrateDownOnce(knex);
+      const revertedColumnInfo = await knex('locations').columnInfo();
+      expect(revertedColumnInfo.target.type).toBe('varchar');
+
+      await knex.destroy();
+    },
+  );
 });