Questions tagged [jpa]
The Jakarta Persistence API (formerly Java Persistence API) (JPA) is a Java specification for accessing, persisting, and managing data between Java objects/classes and a relational database. JPA was defined as part of the EJB 3.0 specification as a replacement for the EJB 2 CMP Entity Beans specification. JPA is now considered the standard industry approach for Object to Relational Mapping (ORM) in the Java Industry.
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Why Join attribute appending with join column?
I have two entity
@Entity
@Table(name = "Student")
class Student{
@Id
@Column(name = "Id")
private Integer id;
@Column(name = "name")
private String name;
@OneToMany(...
- 361
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Joining Entities by a Range - Hibernate
I have a question regarding Hibernate that's been bothering me for some time.
Consider I have two entities:
@Entity
public class Statement {
@Id
@Column
private int id;
@Column
...
- 561
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Column <name> is of type json but expression is of type smallint[]
There is field of json type in postgres db named data_processing_steps.
It's defined in category entity as
@Type(JsonType.class)
@Column(columnDefinition = "json")
private Set<...
- 3,301
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How to reduce time taken by createEntityManagerFactory
I'm setting up unit tests for my company application. It's set up to create a new docker container of the database for every test, so each test has a fresh database to work with. However, I get an IO ...
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record content lost with jooq 18 + spring boot 3.2 + jpa annotations [updated]
I'm working on a small tutorial project that will have both jooq and various spring database implementations. The idea is to demonstrate a core module with nearly everything plus minimal, easily ...
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JPA repository findBy return different result when using H2 and MySQL
This is the simply version of my application.
I have 2 entity.
Customer.java
package com.udacity.jdnd.course3.critter.user;
import java.util.List;
import java.util.ArrayList;
import com.udacity.jdnd....
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[spring-boot]open api can't be stored in mysql database
bonjour,
I have a unsolvable problem ... help me
I downloaded XML open api file and parsed that in spring boot.
Even though mysql db was successfully connected, data wasn't stored in my db table.
Only ...
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JPA entity ID field with a SQL Server 2022 Sequence
I am trying to connect my Spring Boot service to a SQL Server 2022 database, but I am having issues with a sequence:
public class SomeEntity {
@Id
@SequenceGenerator(name = "some_seq"...
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1
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Spring JPA JoinTable
I have three entities. I want to save a survey. The survey will contain all the data that is neccessary:id,section, questions.
The survey_section_question table is created successfully and when I want ...
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Consider defining a bean named 'entityManagerFactory' in your configuration, required a bean named 'entityManagerFactory' that could not be found
I'm getting the below error when I try to run a Spring Boot web application. This is a web application which having thymeleaf and JPA.
Description:
Field checkListRepository in com.example.demo....
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Aggregated One-to-many field not being saved properly into the database with Spring Data
I'm trying to make a simple restful app and got stuck on testing the repo level.
For the educational purpose it's not allowed to use Spring Boot.
I need to have a One-to-many, Many-to-Many, Many-to-...
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3
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92
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one-to-many: JPA generates wrong FK while using ddl-auto=create-drop
It seems that I made a mistake somewhere but I can not see where.
JPA insists on generating a unique constraint on a FK of one-to-many relationship on the child side. This constraint prevents me from ...
- 21.9k
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Why is spring not inserting value into ID column
I am trying to successfully map two classes in an OneToOne relationship; mainly because my User class needs two Ids that are GeneratedValue. I've used Lombok for getter setters and constructors ; I'm ...
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JPA console error in IntelliJ IDEA 2024.1.4
I try to select entity in IntelliJ IDEA Ultimate, but I get error:
java.lang.ClassNotFoundException: jakarta.json.bind.JsonbException PluginClassLoader(plugin=PluginDescriptor(name=Jakarta EE: ...
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Java Spring Boot JPA database connection issue
Im working on Java Spring Boot application, and have a problem with connection to database via JPA. JPA cannot connect to my db. I tried many url configurations, but connection failed and such ...
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