zappyzep/backend/src/migrations/1608692857722-FixStarboardReactionsIndices.ts

import { MigrationInterface, QueryRunner, TableIndex } from "typeorm";

export class FixStarboardReactionsIndices1608692857722 implements MigrationInterface {
  public async up(queryRunner: QueryRunner): Promise<any> {
    // Remove previously-added duplicate stars
    await queryRunner.query(`
        DELETE r1.* FROM starboard_reactions AS r1
        INNER JOIN starboard_reactions AS r2
          ON r2.guild_id = r1.guild_id AND r2.message_id = r1.message_id AND r2.reactor_id = r1.reactor_id AND r2.id < r1.id
      `);

    await queryRunner.dropIndex("starboard_reactions", "IDX_dd871a4ef459dd294aa368e736");
    await queryRunner.createIndex(
      "starboard_reactions",
      new TableIndex({
        isUnique: true,
        columnNames: ["guild_id", "message_id", "reactor_id"],
      }),
    );
  }

  public async down(queryRunner: QueryRunner): Promise<any> {
    await queryRunner.dropIndex("starboard_reactions", "IDX_d08ee47552c92ec8afd1a5bd1b");
    await queryRunner.createIndex("starboard_reactions", new TableIndex({ columnNames: ["reactor_id", "message_id"] }));
  }
}