auto-flush.ts

// querying for author will trigger auto-flush if we have new author persisted
const a1 = new Author(...);
em.persist(a1);
const r1 = await em.find(Author, {});

// querying author won't trigger auto-flush if we have new book, but no changes on author
const b4 = new Book(...);
em.persist(b4);
const r2 = await em.find(Author, {});

// but querying for book will trigger auto-flush
const r3 = await em.find(Book, {});