Bytecode Enhancement fails at the Association Management step when there is more than one ToOne relationship with the same mappedBy value, as follows:
At build time Bytecode Enhancement I receive the following error message:
[ERROR] Failed to execute goal org.hibernate.orm.tooling:hibernate-enhance-maven-plugin:5.0.7.Final:enhance (default) on project test-case-template-hibernate-orm5: Unable to enhance class: com.test.entities.Activity: Unable to enhance persistent attribute [com.test.entities.Activity:team]: Could not enhance entity class [com.test.entities.Activity] to add field writer method [$$_hibernate_write_team]: [source error] $$_hibernate_write_member(com.test.entities.Activity) not found in com.test.entities.Team -> [Help 1]
The key part of the error message is: "$$_hibernate_write_member(com.test.entities.Activity)".
It looks for a badly formed method description, the method should receive a com.test.entities.Member instance.
This happens because the association between entities is considering only the mappedBy value, it should also consider the Typing of the variable.
I partially fixed the problem overriding the method getMappedByFromTargetEntity in the org.hibernate.bytecode.enhance.internal.PersistentAttributesHelper class by complementing this test:
This is not a proper solution, just a starting point, it doesn't take into account type hierarchy for example.
Test Case attached, it uses hibernate-enhance-maven-plugin for testing.
It fails at build test step.
The build succeeds when setting "enableAssociationManagement" to false.