Variable 'this.userInfo' is unbound and cannot be determined - spring

Question

I am developing a maven JDO project, but I am getting this error when I am trying to make relation between two tables (user_login, user_role)
User_Login: user_id(primary key), user_name, user_password,user_role_id
User_Role: id(primary key), role
user_role_id is same as id of user_role table
User.java:
#PersistenceCapable(table = "user_login")
public class User {
#PrimaryKey
#Column(name="user_id")
private Integer userId=0;
#Column(name="user_profile_name")
private String userProfileName=null;
#Column(name="user_email")
private String userEmail=null;
#Column(name="user_contact")
private String userContact=null;
#Column(name="user_name")
private String userName=null;
#Column(name="user_password")
private String userPassword=null;
#ManyToOne
#Column(name="user_role_id")
private Integer userRoleId=0;
Role.java:
#PersistenceCapable(table = "user_role")
public class Role {
#PrimaryKey
#Column(name="id")
private Integer id=0;
#Column(name="role")
private String role=null;
#OneToMany
private User userInfo=null;
DAOImpol:
public List<Role> getUser(String username, String userpassword) {
PersistenceManager pm = this.pmf.getPersistenceManager();
Transaction tx = pm.currentTransaction();
JDOPersistenceManager jdopm = (JDOPersistenceManager)pm;
try {
// Start the transaction
tx.begin();
TypesafeQuery<User> tq = jdopm.newTypesafeQuery(User.class);
//QUser user = QUser.candidate();
QRole role = QRole.candidate();
QUser userInfo=role.userInfo;
List<Role> result = tq.filter(userInfo.userName.eq(username).and(userInfo.userPassword.eq(userpassword))).executeList();
//result = tq.executeResultList(true, user.userId);
if(result.size()>0){
log.info(">>>>>00000000"+" "+result.get(0).getUser().getUserEmail());
log.info(">>>>>11111111"+" "+result.get(0).getRoleId()+" "+result.get(0).getRole());
}else{
log.info("<<<<<<<=====000000");
}
// Commit the transaction, flushing the object to the datastore
tx.commit();
return result;
}
finally {
if (tx.isActive())
{
// Error occurred so rollback the transaction
tx.rollback();
}
pm.close();
}
I am getting this error:
javax.jdo.JDOUserException: Variable 'this.userInfo' is unbound and
cannot be determined (is it a misspelled field name? or is not intended
to be a variable?)
NestedThrowables:
org.datanucleus.exceptions.NucleusUserException: Variable
'this.userInfo' is unbound and cannot be determined (is it a
misspelled
field name? or is not intended to be a variable?)

Answer 1

I found that you'll get this error from JDO if you're using progaurd and progaurd renames your private fields. Adding a -keep to the progaurd config to keep the package with your Persistence Capable classes will fix it.
For example, if you keep all of your Persistence Capable classes in com.example.server.orm package you'd add this to progaurd.conf
-keep class com.example.server.orm.** {*;}