class Athena::ORM::Mapping::MetadataCache
inherits Reference

Class metadata built by one entity manager, reused by others on the same database.

Without a cache, each entity manager builds the metadata of an entity class the first time it needs it. AORM::EntityManagerFactory shares one cache between the entity managers it creates. When creating entity managers directly, pass the same cache to each of them:

cache = AORM::Mapping::MetadataCache.new

em = AORM::EntityManager.new connection, metadata_cache: cache

Metadata depends on the database platform (e.g. which ID generator is used), so a cache must not be shared between databases.