All Questions
1,976
questions
0
votes
0
answers
13
views
Hibernate duplicates query for non-existing entities with OneToOne relationships
I want to prevent the duplicate SQL queries executed by hibernate, as my underlying relation is a complex view, (although maybe postgresql might cache the result, but still I would vastly prefer if ...
- 24.4k
0
votes
1
answer
35
views
How to establish a one-way OneToOne relationship?
public class User {
@Id
private String user_id;
private String email;
private String password;
@Getter
@ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)...
- 11
1
vote
2
answers
60
views
Getting java.lang.StackOverflowError when two users follow each other
I am working on a Java application using Spring Boot, and I have a UserEntity class where users can follow each other. However, when two users follow each other, I encounter a java.lang....
- 21
1
vote
2
answers
115
views
Hibernate StatelessSession.upsert() based on @NaturalId
I have such entity with surrogate PK and unique key based on 3 varchar columns.
public class InvoiceEntity {
@Id
@GeneratedValue
private UUID id;
@NaturalId
private ...
- 33
0
votes
0
answers
30
views
When using an ORM, when would it be better to add fields to a user object and lazy load them vs making a separate repository query?
I am building out a Spring Boot backend using Hibernate and JPA. I have a user object that I plan to fetch given a JWT per request. But past that I am unsure what would be the best way to fetch ...
- 11
0
votes
1
answer
61
views
Hibernate/JPA: How to properly model unidirectional @ManyToMany relationship for CRUD operations?
I have implemented the following entities:
Teacher:
@Getter
@Setter
@ToString
@Entity
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class Teacher {
@Id
@GeneratedValue(strategy = ...
0
votes
0
answers
37
views
Inaccessible Object Exception when trying to persist data to database
I am building an insurance management program with hibernate and javaFX. I was trying to persist an object to my database when I encountered the following error.
Apr 26, 2024 11:33:44 AM org.hibernate....
0
votes
0
answers
28
views
Exception in thread "main" java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration at hibernatTest.Main.main(Main.java:10)
`i am trying to implement Non-maven project using Hibernate but i keep facing this error
Exception in thread "main" java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration
at ...
0
votes
1
answer
35
views
Java JPA find entity with sub array
I will simplify the task a bit, but the problem is the following, I have an Entity that contains id, name and tags.
@Entity
public class MyEntity {
@Id
@GeneratedValue(strategy = GenerationType....
- 74
0
votes
2
answers
45
views
Why does Hibernate create multiple objects for the same entity?
If you get a child entity through a repo and through a parent entity, these will be two different objects
We will also get a different object if we want to save the child entity through the parent
In ...
- 41
0
votes
0
answers
11
views
Title: Issue with Insert Statement Generation for @ElementCollection Mapping in JPA
I'm encountering difficulties with generating insert statements for an @ElementCollection mapping in my JPA entity. Here's a summary of my setup:
I have an entity class CustomMeal that extends another ...
- 1
0
votes
0
answers
26
views
Spring JPA Data bidirectionality doesn't work
Working on some sort of social media where u can post events in your city. Want to add opportunity to like Events.
Event entity:
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(...
- 1
-1
votes
2
answers
132
views
Hibernate: JOIN inheritance question - why the need for two left joins
I've been reading an article about inheritance strategies in Hibernate.
An Author has publications, and a Publication can be a Book or a BlogPost.
In the join inheritance strategy the following table ...
- 5,020
3
votes
0
answers
61
views
@ElementCollection with @OnDelete(action = OnDeleteAction.CASCADE)
I used to have an @ElementCollection with ON DELETE CASCADE on the database level generated by hibernate as follows:
@ElementCollection
@CollectionTable(name = "project2user", joinColumns = @...
- 1,002
1
vote
2
answers
61
views
Why does Hibernate generate a complex subquery for a bidirectional @OneToMany relationship with @JoinTable?
I am working with Spring Boot and Hibernate, managing entities with a bidirectional @OneToMany relationship joined through an intermediary table. Here are my entity definitions:
@Entity
@Table(name = &...
- 13