And add a method to the repository: List<LoginProjection> findAllProjectedBy(); The method name can be simplified to findBy() to match the documentation example at https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#projections
Yes wrapper for javax.mail.Header is needed, in general you cannot persist directly arbitrary classes, especially not the ones that are not Serializable. Also they cannot be elements of list that designs relationship between entities. Value of mappedBy is name of the field that is owning side of bidirectional relationship. For a sake of example, let’s … Read more
DELETE (and INSERT) do not cascade via relationships in JPQL query. This is clearly spelled in specification: A delete operation only applies to entities of the specified class and its subclasses. It does not cascade to related entities. Luckily persist and removal via entity manager do (when there is cascade attribute defined). What you can … Read more
Use the following form: SELECT e FROM Employee e WHERE e.active = TRUE See the docs for more info.
I faced similar experience when using postgresql json function in native JPA query. select * from component where data ::json ->> ?1 = ?2 JPA will throw error that i have not set the named parameter :json. The solution: “select * from component where data \\:\\:json ->> ?1 = ?2”
Until Eclipse Dali gets a generic JPQL editor you can use Hibernate Tools. Hibernate Tools works with Dali and provides a HQL/JPQL query editor which uses Hibernate to execute the queries. An alternative would be to use the JPA Query Tool [JQT], an Interactive JPA query editor and runner. It might be closer to what … Read more
Your JPQL is invalid, remove the brackets List<String> logins = em.createQuery(“SELECT a.accountManager.loginName ” + “FROM Account a ” + “WHERE a.id IN :ids”) .setParameter(“ids”,Arrays.asList(new Long(1000100), new Long(1000110))) .getResultList();
Try this parameter description: List<ShopOrder> getShopOrder(@Param(“id”) long id);
You need to test it with IN and subquery since both do work in JPQL (according to syntax reference they do work together). You may also look at MEMBER OF expressions. But there is a better approach in my opinion. Such queries are called correlated sub-queries and one can always re-write them using EXISTS: SELECT … Read more
Instead of root.join(…) you can use root.fetch(…) which returns Fetch<> object. Fetch<> is descendant of Join<> but it can be used in similar manner. You just need to cast Fetch<> to Join<> it should work for EclipseLink and Hibernate … Join<MyEntity, RelatedEntity> join = (Join<MyEntity, RelatedEntity>)root.fetch(“relatedEntity”); …