How to use projections and specifications with spring data jpa?
The ability to mix Projections and Specifications are not yet supported. There is a bug tracking this.
hibernate
How is a blob column annotated in Hibernate?
@Lob should do the trick for blob and clob (use String as type) @Column( name = “FILEIMAGE” ) @Lob(type = LobType.BLOB) private byte[] fileimage;
How can I use Maven to get the latest Hibernate release?
JBoss have started synchronising their own repo with Maven central as posted on the JBoss community blog , therefore hibernate artifacts are now available without the need to add the JBoss repository to your pom.xml or repository manager. Search result for hibernate-core: To add the Hibernate Core 3.6.3 to your project, just add the following … Read more
Hibernate field naming issue with Spring Boot (naming strategy)
SINCE SPRING-BOOT 1.4 Starting from 1.4, because of the switch to Hibernate 5, the naming strategy has been updated to SpringPhysicalNamingStrategy which should be very close to 1.3 defaults. See also: Spring’s naming strategy PREVIOUS VERSION Spring Boot provides the ImprovedNamingStrategy as default naming strategy, which makes Hibernate search for a team_id column (inferred from … Read more
How to map postgresql “timestamp with time zone” in a JPA 2 entity
I eventually made this “work” – in a hackish sort of way – by turning off schema validation. Previously, I had <property name=”hibernate.hbm2ddl.auto” value=”validate”/>”hibernate.hbm2ddl.auto” in my persistence.xml. When I commented out this property, my app server started and the model “worked”. The final form of my entity was: @Entity @Table(schema = “content”, name = “theme”) … Read more
What does relationship owner means in bidirectional relationship?
Your first example is normal and correct bidirectional one-to-many/many-to-one mapping. Setting Question to Choice-attribute (“owning side”) is enough to have relationship persisted. Entity graph in memory will be messed until other side of the relationship is read from database again. From the database point-of-view owner is the entity that is persisted to table that have … Read more
Hibernate – AnnotationConfiguration deprecated
“All functionality has been moved to Configuration”: http://docs.jboss.org/hibernate/core/3.6/javadocs/org/hibernate/cfg/AnnotationConfiguration.html And here is Configuration: http://docs.jboss.org/hibernate/core/3.6/javadocs/org/hibernate/cfg/Configuration.html
JPA/hibernate sorted collection @OrderBy vs @Sort
If you want to avoid non-standard annotations, you could make kittens use some sorted Collection implementation. This would ensure that kittens is always in sorted order. Something like this: @Entity public class Cat { @OneToMany(mappedBy = “cat”, cascade = CascadeType.ALL) @OrderBy(“name ASC”) private SortedSet<Kitten> kittens = new TreeSet<>(); } Note that this approach also requires … Read more
HQL query with LIKE having issues
Parameters inside string literals are not resolved. You need to add %s to parameter values with string concatenation – either at the program side String QUERY = “FROM Person as p WHERE p.createUser = : createUser AND p.personId in ” + “(SELECT pn.personId FROM PersonName pn ” + “WHERE pn.personNameType=”FIRST” ” + “AND pn.name LIKE … Read more
How to use hibernate criteria to return only one element of an object instead the entire object?
I think you could do that with Projections, something like Criteria.forClass(bob.class.getName()) .add(Restrictions.gt(“id”, 10)) .setProjection(Projections.property(“id”)) );