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Questions tagged jpa

279 questions · page 3 of 6

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16
votes
11
answers

How do you keep clean layers separation with Hibernate/ORM?

java hibernate jakarta-ee jpa orm
asked 2011-11-04T16:25:46.363
37
votes
4
answers

How to create join table with JPA annotations?

java database jakarta-ee jpa orm
asked 2011-11-02T11:13:16.277
33
votes
3
answers

Multiple writable mappings exception in EclipseLink

jpa orm ejb jpa-2.0 eclipselink
asked 2011-10-31T09:55:15.617
10
votes
4
answers

JPA lazy at simple byte[] field level

hibernate jpa nhibernate-mapping lazy-loading jpa-2.0
asked 2011-10-26T11:58:23.593
10
votes
3
answers

How to get rid of 'java.lang.IllegalArgumentException: Unknown entity' while running a simple hibernate app?

hibernate jakarta-ee jpa
asked 2011-10-25T09:50:13.390
16
votes
4
answers

Is it good practice to initialize fields inside a JPA entity getter?

java jpa
asked 2011-10-17T08:44:32.877
8
votes
1
answers

Clearing session, flushing, refreshing, after hibernate bulk updates?

java hibernate jakarta-ee jpa orm
asked 2011-10-13T16:25:16.690
12
votes
3
answers

How to audit JPA without Hibernate Envers

jpa eclipselink audit entitylisteners show-sql
asked 2011-10-13T14:09:18.257
18
votes
4
answers

JPA/Hibernate: @ManyToOne and @OneToOne relationships tagged as FetchType.LAZY and optional = false not loading lazily on em.find()?

java hibernate jpa lazy-loading relationships
asked 2011-10-11T23:30:34.963
39
votes
13
answers

How to silently truncate strings while storing them when they are longer than the column length definition?

java jpa eclipselink
asked 2011-10-04T10:35:39.303
15
votes
2
answers

JPA 2.0 / Hibernate and "orphanRemoval": Just replacing an entity does not remove the old one

java hibernate jpa orphan
asked 2011-09-22T06:20:25.963
9
votes
2
answers

Hibernate: Change instance of base class to subclass

java hibernate jpa
asked 2011-09-17T19:00:59.173
270
votes
5
answers

Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate

java hibernate jpa persistence hibernate-annotations
asked 2011-09-16T02:20:11.957
72
votes
4
answers

UnsupportedOperationException merge-saving many-to-many relation with hibernate and JPA

hibernate jpa many-to-many
asked 2011-09-15T08:40:25.957
16
votes
3
answers

Immutable Value objects and JPA

java hibernate jpa domain-driven-design final
asked 2011-08-28T16:53:55.990
10
votes
2
answers

JPA query for day ignoring the time

jpa jpa-2.0
asked 2011-08-27T18:28:50.270
14
votes
1
answers

Hibernate JPA: How to control "Not-Found" behavior when lazy loading a ManyToOne relation?

hibernate jpa lazy-loading
asked 2011-08-22T03:22:12.823
12
votes
2
answers

Hibernate OneToOne automatic join fetching (resolving n+1 problem)

java hibernate jpa
asked 2011-08-11T12:09:07.903
18
votes
4
answers

"No Persistence Unit Found" error

java hibernate spring jpa
asked 2011-08-08T16:35:28.253
24
votes
1
answers

How to get SELECT values and COUNT value with JPA GROUP BY?

jpa
asked 2011-08-05T12:07:36.857
41
votes
9
answers

Is Select EXISTS() possible in JPQL?

jpa jpql jpa-2.0
asked 2011-07-24T00:01:40.160
10
votes
1
answers

JPA - defining multi-column unique constraints

java jpa persistence
asked 2011-07-11T13:11:57.363
16
votes
1
answers

JPA/Hibernate - Prevent deletion in PreRemove handler?

java hibernate jpa
asked 2011-07-11T05:12:00.443
9
votes
3
answers

How do I query UUIDs stored as binary in a database (JPA/Hibernate/MySQL)

hibernate jpa binary uuid
asked 2011-07-08T18:57:27.070
10
votes
1
answers

In JPQL, how do you access properties of named parameters?

hibernate jakarta-ee jpa jpa-2.0 jpql
asked 2011-07-06T19:02:43.987
28
votes
5
answers

Single Table Inheritance WITHOUT Discriminator column

java hibernate jpa
asked 2011-07-04T14:31:45.680
48
votes
4
answers

Testing an EJB with JUnit

jpa jakarta-ee junit java-ee-6
asked 2011-06-24T15:07:29.177
15
votes
1
answers

Polymorphic CriteriaQuery without inverse relationship

java inheritance jpa criteriaquery
asked 2011-06-21T14:39:15.033
11
votes
6
answers

Using JPA entities in JSF. Which is the best strategy to prevent LazyInitializationException?

hibernate jsf jpa lazy-initialization
asked 2011-06-15T07:11:16.173
16
votes
1
answers

When is it appropriate to use a bidirectional association and when is it not?

hibernate orm jpa entity-relationship
asked 2011-06-13T06:52:03.637
16
votes
2
answers

Update value with join

java hibernate jpa jpql
asked 2011-06-01T13:26:19.613
9
votes
2
answers

Id not being set when calling EntityManager.merge()

java hibernate jpa
asked 2011-06-01T07:46:12.883
53
votes
7
answers

What is the difference between LocalContainerEntityManagerFactoryBean and LocalEntityManagerFactoryBean?

spring hibernate jpa entitymanager spring-orm
asked 2011-05-27T19:28:44.697
17
votes
3
answers

Ordering a join fetched collection in JPA using JPQL/HQL

java jpa hql jpql
asked 2011-05-05T20:38:18.450
24
votes
6
answers

Compare date only (without time) in JPA2 (JPQL)

datetime jpa date jpa-2.0 jpql
asked 2011-05-04T15:39:23.730
16
votes
3
answers

Should I let JPA or the database cascade deletions?

sql jpa jpa-2.0 eclipselink cascading-deletes
asked 2011-04-26T08:04:26.127
18
votes
6
answers

Oracle treating empty string as NULL problem for a Java / JPA programmer

java oracle-database hibernate jpa jpa-2.0
asked 2011-04-01T07:48:19.833
17
votes
3
answers

How do I count the number of rows returned by subquery?

jpa jpa-2.0 jpql criteria-api
asked 2011-03-24T18:44:40.560
30
votes
6
answers

EntityManager persist() not saving anything to database

java hibernate spring jpa
asked 2011-03-20T19:06:29.737
11
votes
4
answers

help me avoid connection timeout with JPA, Hibernate & MySQL

java hibernate jpa jakarta-ee connection-pooling
asked 2011-03-09T15:54:22.120
20
votes
7
answers

@GeneratedValue(strategy = GenerationType.AUTO) not working as thought

hibernate jpa jboss derby
asked 2011-02-26T20:30:45.907
144
votes
3
answers

Mapping many-to-many association table with extra column(s)

hibernate jpa mapping many-to-many join
asked 2011-02-26T13:20:10.717
15
votes
2
answers

JPA: How can an @Embeddable object get a reference to its owner?

java hibernate jpa
asked 2011-02-20T23:33:58.150
37
votes
2
answers

How to write java.sql.Blob to JPA entity?

java jpa blob
asked 2011-02-17T16:19:24.240
11
votes
1
answers

Case-insensitive Query

jpa case-insensitive
asked 2011-02-17T01:28:30.617
21
votes
2
answers

JPA / @PostPersist @PostUpdate - transaction

java jpa transactions
asked 2011-02-04T08:15:58.507
9
votes
2
answers

No autodetection of JPA Entities in maven-verify

java jpa build maven
asked 2011-02-03T11:58:07.947
14
votes
4
answers

Google App Engine App with JPA deployment hangs

java google-app-engine jpa datanucleus
asked 2011-01-31T19:57:31.830
15
votes
3
answers

JPA / Hibernate unidirectional one-to-one mapping with shared primary key

java hibernate jpa jakarta-ee one-to-one
asked 2011-01-21T07:58:20.750
9
votes
3
answers

JPA query language criteriaBuilder

java jpa glassfish ejb jpa-2.0
asked 2011-01-19T19:51:55.863
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