6.5.0 (2025-08-27)

https://mikro-orm.io/blog/mikro-orm-6-5-released

Bug Fixes

• core: allow querying embeddables for null values via collection operators (d7b25a7), closes #6736
• core: do not fail version mismatch checks when getting the current version fails (086d767), closes #6765
• core: do not propagate changes to collections when partially loaded (7068b35), closes #6732 #6734
• core: ensure em.transactional context propagation won't result in breaking identity map (2b608fc), closes #6764
• core: ensure correct runtime value of decimal and float properties (#6807) (7cd8b1c), closes #6806 #6806
• core: fix extra updates after em.refresh on nested entities with embeddables (640985c), closes #6705
• core: fix fetching of autoincrement PK when upserting without a unique value (0dccac7), closes #6755
• core: fix hydration with select-in strategy and PKs with custom types (#6808) (4770462), closes #6726
• core: fix querying by a nested FK as PK (c2c5bfd)
• core: hydrate persisted getters without setters unless explicitly disabled (459329a), closes #6723
• core: ignore properties with hydrate: false from change tracking (4a6fb9b), closes #6723
• core: improve detection of empty flush (6debac9)
• core: respect joined filters in em.count (323ffef), closes #6666
• core: respect logger context in queries from flush and others (#6777) (083a1ee), closes #6776
• core: support cursor based pagination with ScalarReference properties (84d20b1), closes #6793
• core: use default for missing values in multi insert for custom types (eae635f), closes #6727
• postgres: quote string array values with '' instead of \' (4bc1c9e)
• postgres: support primary key with generated identity columns (382d5b3), closes #6693
• query-builder: fix qb.leftJoinAndSelect with a subquery on M:N relations (aa52abb)
• query-builder: fix hydrating 1:1 inverse side via joined strategy (d48359c)
• query-builder: support group operators inside join conditions (#6796) (efe5a56), closes #6795
• reflection: unwrap runtimeType to support correct hydration of scalar references (ff6a7ae), closes #5557
• reflection: unwrap ScalarRef<T> and EntityRef<T> type (6b1a349), closes #5557
• schema: properly handle array defaults in mysql (#6703) (534193c), closes #6688
• sql: correctly handle lazy scalar properties with custom types (#6715) (c8add75)
• sql: fix computing order by clause when ordering by a not populated relation (b8a7984), closes #6757

Features

• core: add balanced loading strategy (#6787) (a7bff86), closes #6129
• core: add loadOrFail to ScalarReference wrapper (#6716) (dcff19f)
• core: add RequiredNullable helper type (#6756) (71f5153), closes /github.com/mikro-orm/mikro-orm/discussions/6744#discussioncomment-13766303
• core: add comprehensive transaction propagation support (#6802) (19ebac4), closes #6788
• core: allow defining entities with inferred interfaces (#6253) (1e6961a), closes #6242
• core: allow triggering onCreate hooks during em.create (#6263) (1a2cc2e)
• core: support contextName in @Transactional decorator (#6719) (9ce9499)
• schema: allow disabling foreign key constraint creation, per relation (#6702) (79e6cb0), closes /github.com/mikro-orm/mikro-orm/issues/2548#issuecomment-2765607556
• schema: allow wilcard-schema friendly index expression (#6706) (688043a), closes #6446
• sql: refactor handling of filters on relations (2d1b889), closes #6760 #6784

Performance Improvements

• core: make em.refresh faster for reloading large entity graphs (a44f671)
• sql: speed up hydration of large to-many collections with joined strategy (#6801) (5faf30c)