Top "Hibernate" questions

What are the possible values of the Hibernate hbm2ddl.auto configuration and what do they do

I really want to know more about the update, export and the values that could be given to hibernate.hbm2…

java hibernate hbm2ddl

How to fix the Hibernate "object references an unsaved transient instance - save the transient instance before flushing" error

I receive following error when I save the object using Hibernate object references an unsaved transient instance - save the …

java hibernate jpa orm entity

How to solve the “failed to lazily initialize a collection of role” Hibernate exception

I have this problem: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: mvc3.model.Topic.comments, no …

java spring hibernate jsp spring-mvc

could not extract ResultSet in hibernate

I have a problem with Hibernate. I try to parse to List but It throws an exception: HTTP Status 500 - …

java sql hibernate spring-mvc

What's the difference between JPA and Hibernate?

I understand that JPA 2 is a specification and Hibernate is a tool for ORM. Also, I understand that Hibernate has …

java hibernate jpa jakarta-ee orm

Difference between FetchType LAZY and EAGER in Java Persistence API?

I am a newbie to Java Persistence API and Hibernate. What is the difference between FetchType.LAZY and FetchType.EAGER …

java hibernate jpa orm java-persistence-api

Hibernate show real SQL

if I set <property name="show_sql">true</property> in my hibernate.cfg.xml configuration file …

java sql hibernate orm

What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association

What is the difference between: @Entity public class Company { @OneToMany(cascade = CascadeType.ALL , fetch = FetchType.LAZY) @JoinColumn(name = "companyIdRef", referencedColumnName = "…

java hibernate jpa orm one-to-many

How to fix org.hibernate.LazyInitializationException - could not initialize proxy - no Session

I get the following exception: Exception in thread "main" org.hibernate.LazyInitializationException: could not initialize proxy - no Session at …

java hibernate session orm lazy-loading

PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate

I have a JPA-persisted object model that contains a many-to-one relationship: an Account has many Transactions. A Transaction has one …

java hibernate jpa entity persist