Using AsyncLocalStorage

info

Since v5 AsyncLocalStorage is used inside RequestContext helper so this section is no longer valid.

In v4 and older versions, the domain api was used in the RequestContext helper. Since v4.0.3, we can use the new AsyncLocalStorage too, if we are on up-to-date node version:

const storage = new AsyncLocalStorage<EntityManager>();

const orm = await MikroORM.init({
  context: () => storage.getStore(),
  // ...
});

app.use((req, res, next) => {
  storage.run(orm.em.fork({ useContext: true }), next);
});