Questions tagged [spring-data-jpa]

Spring Data - JPA is part of the Spring Data umbrella project which makes it easy to implement JPA based repositories

Spring Data JPA, part of the larger spring-data family, makes it easy to easily implement jpa based repositories. This module deals with enhanced support for jpa based data access layers. It makes it easier to build Spring-powered applications that use data access technologies.

spring-data is based on the concepts of Aggregates, Aggregate Roots and Repositories. It works best if these concepts are considered when you design your domain model. You might want to look into "Advancing Enterprise DDD" to learn what that actually means.

Please note that Spring Data doesn't try to abstract over the underlying technology. This means as a user you still have to understand it. In the case of Spring Data JPA this means you need to understand JPA in order to properly work with Spring Data JPA. This applies especially to the workings of the 1st level cache.

Useful links

Popular Questions

What is Spring Data JPA (good for)

Common questions

Are you supposed to have one repository per table in JPA?
Using generics in Spring Data JPA repositories
setMaxResults for Spring-Data-JPA annotation?
JPA Query to handle NULL parameter value and similarly How to query a column which value is null in JPA?
Controlling eager/lazy loading for queries: Hibernate Spring JPA load only specific lazy relationship
How to create a dynamic where clause as one needs for search dialogs for example: Dynamic spring data jpa repository query with arbitrary AND clauses.
Can't create custom query method in Spring Data Repository
Spring Boot, Spring Data JPA with multiple DataSources
Spring data jpa - How to combine multiple And and Or through method name
Spring Data JPA Update @Query not updating?

22458 questions

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Spring Data JPA loads one to one relationship in two queries

I have following classes: @Data @Entity @Table(name = "user_info") public class UserIdentity implements UserDetails { @Id private Long id; private String username; private String password; private String facebookId; private String…

java spring hibernate spring-data-jpa

asked Jan 10 '18 at 21:23

Alex

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JPA One to One mapping with inheritance: 2 Queries for what should be one

I have a one to one relationship between a Media entitiy and a MediaAnalysis entity where the Media entity is an abstract base class: News Report Entity @Entity @DiscriminatorValue("N") public class NewsReport extends Media { @Column(name =…

spring hibernate spring-data-jpa jpql

asked Jan 09 '18 at 13:50

Eduardo

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1 answer

2 Hikari CPs with different datasource configurations?

Has anyone successfully configured two hikari connection pools with different datasources in a spring boot application? How do I do it using application.properties?

spring-boot db2 spring-data-jpa informix hikaricp

asked Jan 08 '18 at 15:46

gcpdev-guy

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0 answers

Data base pessimistic locks with Spring data JPA (Hibernate under the hood)

I need some help with pessimistic entity locking. I'm using PostgreSQL and Spring data JPA (hibernate 5 under the hood) in my application. So, I want to show a task I've faced with. I have some user accounts with money: @lombok.Data //Used to…

spring hibernate jpa locking spring-data-jpa

asked Jan 05 '18 at 15:13

Bohdan Petrenko

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1 answer

hibernate lazy load exception after deep clone using Serialization

TLDR: I am using Spring-jpa and Hibernate in my project, My problem occured only after I'm trying to get a List of objects that defined as Lazy in the entity that I deep cloned using org.apache.commons.lang3.SerializationUtils.clone() method. I get…

java spring hibernate spring-data spring-data-jpa

asked Dec 27 '17 at 09:28

Ron Badur

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5 answers

Spring Dependency Injection into JPA entity listener

I need to have a Spring dependency injected into a JPA entity listener. I know I can solve this using @Configurable and Spring's AspectJ weaver as javaagent, but this seems like a hacky solution. Is there any other way to accomplish what I'm trying…

java spring jpa spring-data spring-data-jpa

asked Dec 22 '17 at 12:38

Krzaku

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1 answer

Using Spring JPA to setup a Aggregate Function for STRING_AGG with Postgresql for a Group_By

I am trying to setup a repository call to retrieve the ID's of a list of test results ids used in the GROUP_BY. I can get this to work using createNativeQuery but I am unable to get this to work using Spring's JPA with the FUNCTION call. …

java spring jpa spring-data-jpa aggregate-functions

asked Dec 19 '17 at 01:27

ALM

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Automatically Add criteria on each Spring Jpa Repository call

I'm writing a library that wraps the JpaRepository interface of Spring Data Jpa because I want to add the same criteria automatically to all JpaRepository DB calls (something like and where t > something). For example findById function of…

java spring spring-data spring-data-jpa jpql

asked Dec 11 '17 at 11:06

Ron Badur

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Spring Data JPA save list entity return list in same the order?

Does the method in Spring-Data-JPA's CrudRepository ~~Iterable ~~saveAll(Iterable ~~entities) return list in the same order ?~~~~~~

java spring jpa orm spring-data-jpa

asked Dec 06 '17 at 17:06
tsarenkotxt

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Order by multi-column that include sort by field collection size spring jpa repository

I don't think it is duplicate of Order by count using Spring Data JpaRepository. Let me explain my problem:- I have a domain object called Account that consists of name, status, list of group objects, list of membership objects. for…

java spring hibernate spring-data-jpa querydsl

asked Dec 05 '17 at 08:12
Vikas Verma

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Understanding Optional.map()

Reviewing an example use of Optional where the optional is first loaded with a database call and then mapped to a Spring security UserDetails instance. The code looks like this: Optional user =…

java java-8 spring-data-jpa

asked Nov 29 '17 at 16:08
Ole

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Why Spring Data JPA's save() is slow when called on a single record vs calling it on a list of records?

I'm experiencing a major time reduction when using save function from SimpleJpaRepository on a single record vs calling save on a list of records. The loop below takes 10 times longer than the list. for (Record r : csvRecords) { …

java transactions spring-data-jpa spring-transactions

asked Nov 24 '17 at 10:08
Oleg

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ClassNotFoundException CrudRepository

I'm reading the JPA docs on spring, and i'm trying to restructure my code. What i have now: BrewerRepository @Repository public class BrewerRepository { @PersistenceContext(name = "vivesPU") private EntityManager entityManager; public…

spring spring-mvc spring-data-jpa

asked Nov 20 '17 at 22:38
vixero

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Dealing with m-to-n relations in @RepositoryRestResource

Preface I want to create a sub-resource of another resource in one call. These resources have a @ManyToMany relationship: Users and Groups. I do not want to create first a user, then the group and after that the relation as it is shown in Working…

spring jackson spring-data-jpa spring-data-rest

asked Nov 19 '17 at 13:35
Stefan Falk

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JPA, Hibernate validators - email validator not applying on String

I'm trying to figure out how to validate DTO in my controller Stack: Spring boot 1.5.4, Spring Data JPA, Hibernate Validation 5, PostgreSQL The problem is that I'm still getting exception about missing validators. Any…

spring-data-jpa bean-validation hibernate-validator

asked Nov 15 '17 at 15:28
vlcik

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