ModelMapper failed to convert java.util.List to java.util.List

Question

I tried to convert a @Entity into a DTO using ModelMapper, so i got this error:

org.modelmapper.MappingException: ModelMapper mapping errors:

1) Converter org.modelmapper.internal.converter.CollectionConverter@f3e6876 failed to convert java.util.List to java.util.List.

1 error

Someone can help me?

.....so the error you're getting is that you cannot convert from a Data Type to the same Data Type? — J. Murray
– J. Murray, Commented Oct 5, 2019 at 14:35
We will need to see more than the error messages you've provided to be able to tell you what is happening. Where is your source code? — J. Murray
– J. Murray, Commented Oct 5, 2019 at 14:36

Gabriel Menezes · Accepted Answer · 2019-10-05 13:48:32Z

5

the real problem was:

Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.example.backapi.aviso.domain.Aviso.links, could not initialize proxy - no Session

Resolved with: @ElementCollection(fetch = FetchType.LAZY)

answered Oct 5, 2019 at 13:48

Gabriel Menezes

1031 gold badge2 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

razvang Over a year ago

Got this exception too. And indeed that was the root cause.

Collectives™ on Stack Overflow

ModelMapper failed to convert java.util.List to java.util.List

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related