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hibernate does not resolve many-to-one-relation

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dobbler

Post subject: hibernate does not resolve many-to-one-relation

Posted: Thu Jan 04, 2018 7:16 am

Newbie

Joined: Tue Nov 28, 2017 9:42 am
Posts: 5

Hi,

I'm currently encountering the following problem:

I have a table with a foreign key e.g.: element *-----1 category ; an element has one category/a category can have many elements.

When I do a from element - HQL statement in the Hibernate Tools in Spring Tools Suite, I get all elements and also the categories. However, when I execute it via Java code the category-references do not get resolved (they are null).

Does anyone know how to solve this?

Thanks,

Regards

Klaus

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vlad

Post subject: Re: hibernate does not resolve many-to-one-relation

Posted: Thu Jan 04, 2018 7:24 am

Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1628
Location: Romania

If you want to fetch them together, use a JOIN FETCH directive:

Code:

select c
from Category c
join fetch c.elements
where c.id = :id

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dobbler

Post subject: Re: hibernate does not resolve many-to-one-relation

Posted: Thu Jan 04, 2018 7:49 am

Newbie

Joined: Tue Nov 28, 2017 9:42 am
Posts: 5

Thank you, it worked.

vlad wrote:

If you want to fetch them together, use a JOIN FETCH directive:

Code:

select c
from Category c
join fetch c.elements
where c.id = :id

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