Recent questions tagged JPA

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jpa - JPQL equivalent of SQL query using unions and selecting constants

I've written a SQL query that basically selects from a number of tables to determine which ones have rows that ... 's possible either. Thoughts? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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680 views

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jpa - MappedSuperclass Alternatives in Grails

In many past projects, I used this JPA / Hibernate approach to add auditing capabilities to a system. It's very ... type of auditing in Grails? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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680 views

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jpa - Returning a numeric value with hibernate @NamedNativeQuery

I've this question: "... if the query just returns a number (i.e., the query is something like select ... is the proper way of doing this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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jpa - spring-orm-4.2.6 incompatible to hibernate-orm-5.2.0

Latest Hibernate ORM release (5.2.0) renders Spring ORM (4.2.6, latest) incompatible because Hibernate had to ... with Hibernate 5.2.0? Bye See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

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jpa - orm.xml does not override annotations

I ran into an issue where JPA on Derby defaults the BLOB size to 64KB. I can resolve this by setting the ... ? Shouldn't this be simple? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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779 views

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jpa - Date literals in Hibernate

I wonder how to use date literals in Hibernate query language. I did as follows in my JPA project (as ... provider for my JPA project. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jpa - Spring data Pageable and LIMIT/OFFSET

i'm looking at migrating our traditional jpa/dao solution to Spring Data. However, one of our front-ends is SmartGWT, ... , limit 5 to a page. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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677 views

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jpa - EntityManager trying to insert entities without being prompted

Perhaps I'm over-simplifying this by only giving you a small snippet of code (and I'll post more if that ... -syncing would do the same thing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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954 views

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jpa - Hibernate relation OneToMany with non unique key

I am not able to describe my problem, I try it again with example: I have two entities (tables): Department ... loading, cascase persist ...) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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jpa - Hibernate changes @Table(name) to lowercase

I have a Table Per Class Inheritance in Hibernate. @Entity @Inheritance(strategy=InheritanceType.TABLE_PER_CLASS) public ... can avoid it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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736 views

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jpa - OptimisticLockException not thrown when version has changed in spring-boot project

Model structure: @MappedSuperclass public class BaseModel<K extends Comparable> implements Serializable, Comparable<Object> ... webmvc project. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

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jpa - requestfactory and findEntity method in GWT

I am trying to use RequestFactory. My ORM provider is JPA. I have a method to retrieve a list of entity called ... for each item in the list? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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jpa - Spring Boot 1.4 : class path resource [] cannot be resolved to URL because it does not exist

The project without JPA works fine with 1.3, but throws the following exception with 1.4: 2016-07-31_19:29:21 ... ] ... 31 common frames omitted See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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jpa - hibernate - how to save parent with detached child

I am sending an object from UI. This object is going to be created with a reference to an existing child. This ... , but none of them worked. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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jpa - Cannot use an EntityTransaction while using JTA

I'm receiving this error: javax.servlet.ServletException: java.lang.IllegalStateException: Exception Description: Cannot use ... in advance, AN See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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609 views

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jpa - envers multi level entity revision howto

User have n Contacts. A Contact can have a localized Comment (Comments are shared between Contacts). Java Beans: @Audited ... I do this? :D Thxs See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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795 views

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jpa - Fix for Hibernate error "Use of the same entity name twice"

How you fix the following Hibernate error: What does "Use of the same entity name twice". See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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773 views

1 answer

jpa - Returning a numeric value with hibernate @NamedNativeQuery

I've this question: "... if the query just returns a number (i.e., the query is something like select ... is the proper way of doing this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

953 views

1 answer

jpa - JPQL equivalent of SQL query using unions and selecting constants

I've written a SQL query that basically selects from a number of tables to determine which ones have rows that ... 's possible either. Thoughts? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

648 views

1 answer

jpa - MappedSuperclass Alternatives in Grails

In many past projects, I used this JPA / Hibernate approach to add auditing capabilities to a system. It's very ... type of auditing in Grails? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

491 views

1 answer

jpa - Configuring EJB on JBoss AS 7 using JTA datasources: every statement is commited

everybody! I've been trying to find the answer for some time but I didn't manage. I try to configure my ... to any ideas. Thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

1 answer

jpa 2.0 - JPA2 Criteria queries on entity hierarchy

suppose i have the following entity domain: @Entity @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name=" ... , 1)); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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650 views

1 answer

jpa - How to get DataSource or Connection from JPA2 EntityManager in Java EE 6

I have a working application where I use Java EE 6 with EclipseLink for persistence and a PostgreSQL database ... to protect against injections? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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989 views

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jpa - EclipseLink native query result into POJO - Missing descriptor for [Class]

I'm using EclipseLink to run some Native SQL. I need to return the data into a POJO. I followed the ... ; return query.getResultList(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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589 views

1 answer

jpa - How to get DataSource or Connection from JPA2 EntityManager in Java EE 6

I have a working application where I use Java EE 6 with EclipseLink for persistence and a PostgreSQL database ... to protect against injections? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

918 views

1 answer

jpa - EclipseLink native query result into POJO - Missing descriptor for [Class]

I'm using EclipseLink to run some Native SQL. I need to return the data into a POJO. I followed the ... ; return query.getResultList(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

1 answer

jpa 2.0 - Perform UPDATE without SELECT in eclipselink

Is is possible (without writing custom SQL) to have Eclipselink trust me as to whether to perform an update ... I am missing something obvious! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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565 views

1 answer

jpa - WildFly + Hibernate

I've been struggling for days with configuring Hibernate and run it on WildFly. Here is my code: META-INF/ ... am using IntelliJ for testing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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