Kutt/server/migrations/20200730203154_expire_in.ts

import { Knex } from "knex";

export async function up(knex: Knex): Promise<any> {
  const hasExpireIn = await knex.schema.hasColumn("links", "expire_in");
  if (!hasExpireIn) {
    await knex.schema.alterTable("links", table => {
      table.dateTime("expire_in");
    });
  }
}

export async function down(): Promise<any> {
  return null;
}