feat: defaultFeedId index

fixes fk constraint slowness on deletion

Author: capJavert

src/entity/user/User.ts

@@ -255,6 +255,7 @@ export class User {
   @Column({ type: 'boolean', default: true })
   followNotifications: boolean;
 
+  @Index('IDX_user_defaultFeedId')
   @Column({ type: 'text', nullable: true })
   defaultFeedId?: string | null;
 

src/migration/1782289467831-UserDefaultFeedId.ts

@@ -0,0 +1,15 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class UserDefaultFeedId1782289467831 implements MigrationInterface {
+  name = 'UserDefaultFeedId1782289467831';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `CREATE INDEX IF NOT EXISTS "IDX_user_defaultFeedId" ON "user" ("defaultFeedId") `,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP INDEX IF EXISTS "IDX_user_defaultFeedId"`);
+  }
+}