CODEWITHSUNDEEP
hibernate
Syed
Syed

Reputation: 2607

Select query not working of HQL in Hibernate

I'm trying to fetch results using select query of HQL of Hibernate. However its throwing an error. My code and model class as follows.

package com.chni;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Dashboard {

@Override
public String toString() {
    return "Dashboard [uid=" + uid + ", keyname=" + keyname + ", dbvalue="
            + dbvalue + ", getUid()=" + getUid() + ", getKeyname()="
            + getKeyname() + ", getDbvalue()=" + getDbvalue()
            + ", getClass()=" + getClass() + ", hashCode()=" + hashCode()
            + ", toString()=" + super.toString() + "]";
}

@Id
@GeneratedValue
private int dbid;

private String uid;

private String keyname;

private String dbvalue;

public String getUid() {
    return uid;
}

public void setUid(String uid) {
    this.uid = uid;
}

public String getKeyname() {
    return keyname;
}

public void setKeyname(String keyname) {
    this.keyname = keyname;
}

public Dashboard(String uid, String keyname, String dbvalue) {
    super();
    this.uid = uid;
    this.keyname = keyname;
    this.dbvalue = dbvalue;
}

public String getDbvalue() {
    return dbvalue;
}

public void setDbvalue(String dbvalue) {
    this.dbvalue = dbvalue;
}

}

My code

 String hql = "FROM com.chni.Dashboard where uid = "+userId;
 Query query = session.createQuery(hql);
 System.out.println(query.list());
 List<Dashboard> listUserDetails = query.list();

 for (Dashboard user : listUserDetails) {
    System.out.println(user.getUid());
 }

Error is as follows 

Feb 19, 2016 4:05:37 PM org.hibernate.hql.internal.QueryTranslatorFactoryInitiator initiateService
INFO: HHH000397: Using ASTQueryTranslatorFactory
Hibernate: 
select
    dashboard0_.dbid as dbid1_0_,
    dashboard0_.dbvalue as dbvalue2_0_,
    dashboard0_.keyname as keyname3_0_,
    dashboard0_.uid as uid4_0_ 
from
    Dashboard dashboard0_ 
where
    dashboard0_.uid=2
org.hibernate.InstantiationException: No default constructor for entity:  :  com.intu.Dashboard
 at   org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:81)
at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:101)

I have searched other stack questions with similar errors, but couldn't able to figure it out the exact issue. Am I missing anything in the code or POJO?

Upvotes: 0

Views: 898

Answers (1)

StanislavL
StanislavL

Reputation: 57421

Just add a constructor without parameters

public Dashboard() {}

Upvotes: 1

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