Result cache

MikroORM has simple result caching mechanism. It works with those methods of EntityManager: find(), findOne(), findAndCount(), findOneOrFail(), count(), as well as with QueryBuilder result methods (including execute).

By default, in memory cache is used, that is shared for the whole MikroORM instance. Default expiration is 1 second.

const res = await em.find(Book, { author: { name: 'Jon Snow' } }, {
  populate: ['author', 'tags'],
  cache: 50, // set expiration to 50ms
  // cache: ['cache-id', 50], // set custom cache id and expiration
  // cache: true, // use default cache id and expiration
});

Or with query builder:

const res = await em.createQueryBuilder(Book)
  .where({ author: { name: 'Jon Snow' } })
  .cache()
  .getResultList();

We can change the default expiration as well as provide custom cache adapter in the ORM configuration:

const orm = await MikroORM.init({
  resultCache: {
    adapter: MemoryCacheAdapter,
    expiration: 1000, // 1s
    options: {},
  },
  // ...
});

Custom cache adapters need to implement CacheAdapter interface.