Question

[Solved] org.hibernate.AnnotationException: No identifier specified for entity – even when it was

I have the following configuration:

<bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="jpaDataSource" />
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
        </property>
        <property name="jpaProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <property name="packagesToScan">
        <list>
            <value>com.example.domain</value>
            <value>com.example.repositories</value>
        </list>
    </property>
</bean>

I have my Geoname class in com.example.domain:

@Entity
@Table(name="geonames")
public class Geoname implements Serializable {

    @Id
    @Column(name="geonameid")
    private Long geonameid = null;
}

yet, when running, I get the following exception:

Caused by: org.hibernate.AnnotationException: No identifier specified
for entity: com.example.domain.Geoname at
org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:277)
at
org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:224)
at
org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:664)
at
org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3449)
at
org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3403)
at
org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1330)
at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1730)

Any ideas why?

side note: I am combining both mongodb and hibernate/ mysql on this project.

Solution #1:

I had the following

import org.springframework.data.annotation.Id;

Naturally, it should be:

import javax.persistence.Id;

Thanks to @JB Nizet

Respondent: checklist

Solution #2:

I faced the same error.I solved it and figured out i didn’t put @Id annotations in id field in my Entity class.

@Entity
@Table(name="geonames")
public class Geoname implements Serializable {

    @Column(name="geonameid")
    private Long geonameid = null;
}
Respondent: checklist

Solution #3:

try this

  @Column(name="geonameid",unique=true,nullable=false)
Respondent: Kunal Hazard

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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