Map DTOs to Entities in Symfony with ObjectMapper

Symfony’s ObjectMapper eliminates repetitive DTO-to-entity code by mapping objects directly (no array round-trip), supports updates to existing entities, and offers fine-grained control via #[Map] for renaming, transforming, and conditional mapping. It plays nicely with modern workflows (#[MapRequestPayload] for DTOs, then map to domain), keeps controllers lean, improves testability in hexagonal architectures, and can ease legacy refactors. Use the Serializer for format conversion; use ObjectMapper for object-to-object. Although currently experimental, it already delivers cleaner, faster, and more maintainable API layers.