CODEWITHSUNDEEP
javahibernatejpa
Raghu
Raghu

Reputation: 1324

How to map bean property for one to many in Hibernate

I have two tables vehicleregister and groupdetails for that I have beans as VehicleRegisterBean and GroupDetails common field is groupid. Here 1 group can contains many vehicles for that I am performing OnetoMany relation for that I have defined bean as,

VehicleRegiserBean ,

@Entity
@Table(name = "vehicle_register")
public class VehicleRegisterBean {
 // somefields

@ManyToOne
@JoinColumn(name="groupid", nullable=false)
private GroupDetails groupDetails;

//getter setters
}

and

GroupDetails,

@Entity
@Table(name = "group_details")
public class GroupDetails {

//some fields

@OneToMany(mappedBy="GroupDetails")
private Set<VehicleRegisterBean> vehicleRegisterBean;

//getters setters
}

but I am getting exception as, 

org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: com.abc.its.beans.VehicleRegisterBean.GroupDetails in com.abc.its.beans.GroupDetails.vehicleRegisterBean
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:685)
at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:645)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:65)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1716)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)

can anyone help me to solve this.

Upvotes: 0

Views: 514

Answers (2)

Learner
Learner

Reputation: 21393

The value for mappedBy attribute represents the field in your VehicleRegisterBean class which is groupDetails but you are using GroupDetails in mappedBy.

So hibernate is trying to look for property GroupDetails in VehicleRegisterBean and saying that it is not able to find that property. Thats is what the error says:

mappedBy reference an unknown target entity property: 
com.abc.its.beans.VehicleRegisterBean.GroupDetails

Upvotes: 2

Periklis Douvitsas
Periklis Douvitsas

Reputation: 2491

change

@OneToMany(mappedBy="GroupDetails")

to

@OneToMany(mappedBy="groupDetails")

it is the name that you declare here, 

private GroupDetails groupDetails;

Upvotes: 2

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