[question] Not a managed type

Hello!

Just stumbled upon your project and it looks quite interesting, however, I’m having a hard time wrapping my head around it. Please, help!

I use spring-data-jpa in my project and everything worked without a glitch before I’ve added blaze-persistence… My entities have UUID PK and while constructing CriteriaBuilderFactory

    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_SINGLETON)
    @Lazy(false)
    public CriteriaBuilderFactory createCriteriaBuilderFactory() {
        CriteriaBuilderConfiguration config = Criteria.getDefault();
        return config.createCriteriaBuilderFactory(entityManagerFactory);
    }

I end up with exception:

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.blazebit.persistence.CriteriaBuilderFactory]: Factory method 'createCriteriaBuilderFactory' threw exception; nested exception is java.lang.IllegalArgumentException: Not a managed type: class java.util.UUID
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE]
	... 44 common frames omitted
Caused by: java.lang.IllegalArgumentException: Not a managed type: class java.util.UUID
	at org.hibernate.jpa.internal.metamodel.MetamodelImpl.managedType(MetamodelImpl.java:210) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]

Please advise how to overcome this issue!

Thanks in advance, Andrey

[beikov]

Thanks 😃 I talked to Markus Winand(author of the article) a few weeks ago, and figured out, that the chosen keyset pagination strategy is not yet perfect, but that will change in the final 1.2.0 version: https://github.com/Blazebit/blaze-persistence/issues/419

[beikov]

f you look into the core documentation there is something called implicit group by generation which is what is causing the group by being generated. This is a post step that just makes your life easier. If you want to have custom grouping or having predicates you can simply add them, on top of that, the rest of the needed group bys is added, skipping duplicates. It is by design that having is only allowed when specifying an explicit group by. Note that you don’t have the specify the full group by, just the item Id is enough.