hibernate/hibernate-orm · error · TransformationException

Error transforming <many-to-one/> : {}

Error message

Error transforming <many-to-one/> : {}

What it means

Error "Error transforming <many-to-one/> : {}" thrown in hibernate/hibernate-orm.

Source

Thrown at hibernate-core/src/main/java/org/hibernate/boot/jaxb/hbm/transform/HbmXmlTransformer.java:2191

						"<dynamic-component/> mappings not supported for transformation [name=%s]",
						name
				);
			}
			else if ( hbmAttributeMapping instanceof JaxbHbmOneToOneType hbmOneToOne ) {
				try {
					final var propertyInfo = managedTypeInfo.propertyInfoMap().get( hbmOneToOne.getName() );
					transferOneToOne( hbmOneToOne, propertyInfo, attributes );
				}
				catch (Exception e) {
					throw new TransformationException( "Error transforming <one-to-one/> : " + hbmOneToOne.getName(), e, origin() );
				}
			}
			else if ( hbmAttributeMapping instanceof JaxbHbmManyToOneType hbmManyToOne ) {
				try {
					transferManyToOne( managedTypeInfo, attributes, hbmManyToOne );
				}
				catch (Exception e) {
					throw new TransformationException( "Error transforming <many-to-one/> : " + hbmManyToOne.getName(), e, origin() );
				}
			}
			else if ( hbmAttributeMapping instanceof JaxbHbmAnyAssociationType any ) {
				try {
					final var propertyInfo = managedTypeInfo.propertyInfoMap().get( any.getName() );
					attributes.getAnyMappingAttributes().add( transformAnyAttribute( any, propertyInfo ) );
				}
				catch (Exception e) {
					throw new TransformationException( "Error transforming <any/> : " + any.getName(), e, origin() );
				}
			}
			else if ( hbmAttributeMapping instanceof PluralAttributeInfo hbmCollection ) {
				final var propertyInfo = managedTypeInfo.propertyInfoMap().get( hbmCollection.getName() );
				if ( hbmCollection.getElement() != null || hbmCollection.getCompositeElement() != null ) {
					try {
						attributes.getElementCollectionAttributes().add( transformElementCollection( roleBase, hbmCollection, propertyInfo ) );
					}
					catch (Exception e) {

View on GitHub (pinned to fad1729dce)

Solutions

1. Check the <many-to-one/> element attributes (class, column, not-null, fetch) for correctness.
2. Verify the referenced target entity class is mapped and the column names are valid.
3. Review the causal exception to pinpoint the failing attribute.

When it happens

Trigger: The hbm.xml to mapping.xml transformer hits an unexpected structure.

Common situations: Converting legacy hbm.xml documents containing constructs the transformer does not handle.

AI-assisted analysis of hibernate/hibernate-orm@fad1729dce (2026-08-22). Data as JSON: /api/errors/53bf4c8e78b7683f. Report an issue: GitHub.