hibernate-annotations

问题 How do you map a single value from a column in another table to the current object? Example: class Foo { @Id @Column(name="FOO_ID") private String fooId; @Column(name="FOO_A") private String fooA; //Column to map to another table? //is a one to one mapping - but don't want a separate object for this. private String barCode; } Table: Fields Foo: FOO_ID, FOO_A Bar: FOO_ID, BAR_CODE How do I retrieve the BAR_CODE field without creating a separate object (or a secondary table) using JPA

问题 Is there a setting in hibernate to ignore null values of properties when saving a hibernate object? NOTE In my case I am de-serializing JSON to a Hibernate Pojo via Jackson. The JSON only contains some of the fields of the Pojo. If I save the Pojo the fields that were not in the JSON are null in the Pojo and hibernate UPDATES them. I came accross the setting updateable=false , but this isn't a 100% solution. http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#entity

问题 I have a compound Primary Key (IDHOLIDAYPACKAGE, IDHOLIDAYPACKAGEVARIANT) in table HolidayPackageVariant where IDHOLIDAYPACKAGE refers to entity HolidayPackage with a Many to One relationship between HolidayPackageVariant and HolidayPackage . When I try to do the compund PK mapping in HolidayPackageVariant, I get the following error: Initial SessionFactory creation failed.org.hibernate.annotations.common.AssertionFailure: Declaring class is not found in the inheritance state hierarchy: org

问题 How do I generate hibernate domain classes from tables with annotations at field level? I used Hibernate Tools project and generated domain classes from the tables in the database. The generated classes have annotations on the getter methods rather than at the field level. Kindly advice a way to generate domain classes that have the fields annotated. Is there any refactoring facility available in eclipse/IDEA etc.. to move the annotations from method level to field level? Appreciate your help

问题 Why am I getting this exception? package com.domain.idea; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.JoinColumn; import javax.persistence.OneToOne; import javax.persistence.Table; import org.hibernate.annotations.AccessType; /** * object model for the view [InvestmentReturn].[vMAE_MFE] */ @Entity @Table(name="vMAE_MFE", schema="InvestmentReturn") @AccessType("field") public class MAE_MFEView { /** * trade

问题 I'm using Hibernate Annotations. In all my model classes I annotate like this: @Entity @Table public class SomeModelClass { // } My hibernate.cfg.xml is <hibernate-configuration> <session-factory> <!-- some properties --> <mapping package="com.fooPackage" /> <mapping class="com.fooPackage.SomeModelClass" /> </session-factory> </hibernate-configuration> For every class I add to the com.fooPackage I have to add a line in the hibernate.cfg.xml like this: <mapping class="com.fooPackage

问题 I am getting the below error. But i am unable to find what the error is. Caused by: java.lang.NullPointerException at org.hibernate.cfg.Configuration.processFkSecondPassInOrder(Configuration.java:1481) at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1419) at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1375) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:717) at org.springframework.orm

问题 My pom.xml is : <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>HibernateOneToOneMapping</groupId> <artifactId>HibernateOneToOneMapping</artifactId> <version>0.0.1-SNAPSHOT</version> <build> <sourceDirectory>src</sourceDirectory> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId>

问题 I am asking because I would like to use code generation for the getters/setter. And also because I would prefer the mapping annotations to appear at the top of the class, where I declare the fields. I wonder if this approach is correct: @Entity @Table(name = "test") // @Access(AccessType.PROPERTY) // cannot use this, because hibernate complains that no public class Test implements Serializable { @Id // I hope this results in property access for all of the other // properties as well, but I am

问题 I'm using Wicket in combination with Spring and Hibernate, at least that's what I'm trying to do, the problem comes with auto generating the tables with Hibernate annotations. I've been trying many changes in the configuration but can't seem to figure out why my configuration doesn't generate any tables. And I'm hoping someone can point me in the right direction, even about the Spring configuration I'm not sure. I've included all the files I'm using to try to make this work in links, so that