Fundamentals | MikroORM

📄️ Identity Map

MikroORM uses identity map in background, so we will always get the same instance of one entity.

Every single entity relation is mapped to an entity reference. Reference is an entity that has

OneToMany and ManyToMany properties are stored in a Collection wrapper.

Entity Repositories are thin layers on top of EntityManager. They act as an

Starting v3.4, transactions are also supported in MongoDB driver.

Mapped Superclasses

From v4.2, cascade merging is no longer configurable (and is kept enabled for all relations).

MikroORM has the ability to pre-define filter criteria and attach those filters

Under the hood, MikroORM uses ts-morph to read

or EntityRepository to have access to createQueryBuilder() method.

MikroORM has simple result caching mechanism. It works with those methods of

For development purposes it might come handy to enable logging and debug mode: