Missing CrudRepository#findOne method
Please see DATACMNS-944 which is associated to this commit which has the following renames
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║ Old name ║ New name ║
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║ findOne(…) ║ findById(…) ║
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║ save(Iterable) ║ saveAll(Iterable) ║
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║ findAll(Iterable) ║ findAllById(…) ║
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║ delete(ID) ║ deleteById(ID) ║
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║ delete(Iterable) ║ deleteAll(Iterable) ║
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║ exists() ║ existsById(…) ║
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Note that findById
is not an exact replacement for findOne
, it returns an Optional
instead of null
.
Being not very familiar with new java things it took me a little while to figure out, but this turns the findById
behavior into the findOne
one:
return rep.findById(id).orElse(null);
We had many hundreds of usages of the old findOne()
method. Rather than embark on a mammoth refactor, we ended up creating the following intermediary interface and had our repositories extend it instead of extending JpaRepository
directly
@NoRepositoryBean
public interface BaseJpaRepository<T, ID> extends JpaRepository<T, ID> {
default T findOne(ID id) {
return (T) findById(id).orElse(null);
}
}