jpa-2.1

I have a Lazy collection that I want to initialize at will in my service/controller. At this moment I can do: Hibernate.initialize( myEntity.getListOfThings() ); This command is hibernate dependent and does not make the implementation of JPA transparent. Is there a JPA elegant way of doing this? Master Slave No, there's no JPA equivalent. You can learn if the object is loaded and than use one of the two options, either accessing the properties while the object is still attached to persistence context, what I typically see is calling size, just for the sake of initializing the collection

There are two tables in MySQL database user_table feedback The relationship between them is intuitive - one to many from user_table to feedback . I need to fetch only a list of selected columns from these tables which are From feedback feedbackId (java.lang.Long) feedbackTitle (java.lang.String) feedbackDescription (String, decorated by @Lob ) feedbackDate (org.joda.time.DateTime) testimonial (java.lang.Boolean) From user_table userId (java.lang.Long) firstName (java.lang.String) These many fields out of many others are required to get by executing a query. The criteria query is as follows.

I am doing a prototype using Spring Boot on an existing project with many Hibernate dependencies. I am trying to define a custom LocalEntityManagerFactoryBean and it is here that I get this error: java.lang.NoSuchMethodError: javax.persistence.JoinColumn.foreignKey()Ljavax/persistence/ForeignKey; I have tried updating my hibernate versions (could not use all latest versions due to project backward compatibility causing many other compile errors) but with the following hibernate dependency graph could get it to compile but still get this runtime dependency error. When I searched for this error

I try to map a native query to a non-Entity class. I have the following Entity: @Entity @Table(name = "Groups") @SqlResultSetMapping(name = "groupList", classes = { @ConstructorResult(targetClass = GroupListEntry.class, columns = { @ColumnResult(name = "id", type = Long.class), @ColumnResult(name = "name", type = String.class), @ColumnResult(name = "typeId", type = Long.class), @ColumnResult(name = "lastUpdateDate", type = Date.class) }) }) public class GroupEntity implements Serializable { ... } I expected that calling final Query query = getEntityManager().createNativeQuery(q.toString(),

I'd like to add support for the Java 8 Date/Time API (JSR-310) in my JPA-enabled application. It's clear that JPA 2.1 does not support the Java 8 Date/Time API . As a workaround, the most common advise is to use an AttributeConverter . In my existing application, I changed my entities to use LocalDate / LocalDateTime types for the column mapping fields and added legacy setter/getters for java.util.Date to them. I created corresponding AttributeConverter classes. My application does now fail when using Query.setParameter() with java.util.Date instances (it worked before the transition to the

I want to convert my sql query from SQL to CriteriaQuery, I have this sql query: 1) SELECT * FROM table AS t WHERE id = (SELECT MAX(id) FROM table AS t WHERE t.element_id = 354 AND (name <> 'foo' OR (name = 'bar' AND event = 'foo'))); 2) SELECT tr1.* FROM table AS tr1 INNER JOIN (SELECT MAX(id) AS id FROM table AS tr WHERE tr.element_id = 354 AND (name <> 'foo' OR (name = 'bar' AND event = 'foo'))) AS tr2 ON tr1.id = tr2.id; How is the best way to do this ? public Predicate createsubqueryDateGreaterThanTest(CriteriaBuilder cb, Root<? extends Entity> root, Date inputDate){ // create the outer

I have two entities parent and child with a unidirectional relationship class Parent { @Id @GeneratedValue(strategy= GenerationType.AUTO) private Long id; } and class Child { @Id @GeneratedValue(strategy= GenerationType.AUTO) private Long id; @ManyToOne(optional = false) @JoinColumn(name = "parent_id") @OnDelete(action = OnDeleteAction.CASCADE) private Parent parent; } In the application.properties file I have configured spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect spring.jpa.database-platform = org.hibernate.dialect.MySQL5InnoDBDialect But when I run the