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 Post subject: hibernate does not resolve many-to-one-relation
PostPosted: 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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 Post subject: Re: hibernate does not resolve many-to-one-relation
PostPosted: Thu Jan 04, 2018 7:24 am 
Hibernate Team
Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1630
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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 Post subject: Re: hibernate does not resolve many-to-one-relation
PostPosted: 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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