Hi,

I've created a table in the Google App Engine Datastore. It contains the following FIELDS(GROUPNAME,GROUPID,GROUPDESC). How do I set GROUPID as the primary key?

My code is as follows:

@Entity

@Table(name="group" , schema="PUBLIC")

public class Creategroup {

    @Basic

    private String groupname;

     @Basic   

    private  String groupid;

    @Basic

    private String groupdesc;



 public void setGroupname(String groupname) {

  this.groupname = groupname;

 }

 public String getGroupname() {

  return groupname;

 }

 public void setGroupid(String groupid) {

  this.groupid = groupid;

 }

 public String getGroupid() {

  return groupid;

 }

 public void setGroupdesc(String groupdesc) {

  this.groupdesc = groupdesc;

 }

 public String getGroupdesc() {

  return groupdesc;

 }

 public Creategroup(String groupname, String groupid, String groupdesc
   ) {

  // TODO Auto-generated constructor stub
    this.groupname = groupname;

    this.groupid = groupid;

    this.groupdesc = groupdesc;


 }

}