I have a spring-hibernate application which work fine with JPA anotations, but I want to change anotations with xml configuration, but but I get this error:
org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [FROM User]
java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [FROM User]
User.java
package com.fp.models;
public class User implements UserDetails {
private long id;
private String username;
private String password;
private Set<Role> authorities;
public User() {
}
User.hbm.xml
<?xml version = "1.0" encoding = "utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.fp.models.User" table="users">
<id name="id" type="long" column="user_id">
<generator class="native"/>
</id>
<property name="username" column="username" type="string"/>
<property name="password" column="password" type="string"/>
<set name="authorities" table="users_roles"
inverse="false" lazy="true" fetch="select" cascade="all" >
<key>
<column name="user_id" not-null="true" />
</key>
<many-to-many entity-name="com.fp.models.Role">
<column name="role_id" not-null="true" />
</many-to-many>
</set>
</class>
</hibernate-mapping>
HibernateConfiguration.java -> https://pastebin.com/DrcGSBAp
this is the configuration which i use with the anotations
Method for test:
#Override
public int listAllUsers() {
try (Session session = sessionFactory.openSession()) {
String hql = "FROM User";
Query query = session.createQuery(hql);
if (query.list().size() == 0) {
return 0;
} else {
return 1;
}
} catch (HibernateException he) {
System.out.println(he.getMessage());
throw he;
}
}
Related
I am trying to retrieve a list of products with they're associated offers. After iterating through the result of the query I want to be able to use the getters/setters from the products class but I know it's not working because the query is not returning an instance of Product.
function to grab the products:
public List<Product> getProducts() {
factory = (new Configuration()).configure().buildSessionFactory();
Session session = factory.getCurrentSession();
session.beginTransaction();
List<Product> products = new ArrayList<Product>();
Query query = session.createQuery("from Product p INNER JOIN p.offers");
//The castList is declared and explained at the bottom of listing
List<Product> list = query.list();
Iterator<Product> iter = list.iterator();
while (iter.hasNext()) {
Product product = iter.next();
System.out.println(product);
}
}
Hibernate mapping for Offer:
<hibernate-mapping>
<class name="shoppingbasket.Offer" table="offers">
<id name="offerID" type="integer" access="field">
<column name="OfferID" />
<generator class="assigned" />
</id>
<property name="offerDescription" type="java.lang.String" access="field">
<column name="OfferDescription" length="60" not-null="true"/>
</property>
<property name="shortDescription" type="java.lang.String" access="field">
<column name="ShortDescription" length="10" not-null="false"/>
</property>
<property name="TFTPOTGroup" type="java.lang.Integer" access="field">
<column name="TFTPOTGroup" length="4" not-null="false" default="null"/>
</property>
<property name="discountPercentage" type="java.lang.Double" access="field">
<column name="DiscountPercentage" not-null="false" default="null"/>
</property>
</class>
Hibernate mapping for Product:
<hibernate-mapping>
<class name="shoppingbasket.Product" table="products">
<id name="productID" type="integer" access="field">
<column name="ProductID" />
<generator class="assigned" />
</id>
<property name="offerID" type="java.lang.Integer" access="field">
<column name="OfferID" />
</property>
<property name="productName" type="java.lang.String" access="field">
<column name="ProductName" length="40" not-null="true"/>
</property>
<property name="unitPrice" type="java.math.BigDecimal" access="field">
<column name="UnitPrice"/>
</property>
<one-to-one name="offers" class="shoppingbasket.Offer" />
</class>
Product class:
public class Product implements java.io.Serializable {
private Integer productID;
private Integer offerID;
private String productName;
private BigDecimal unitPrice;
private Offer offer;
public Integer getProductID() {
return productID;
}
public void setProductID(Integer productID) {
this.productID = productID;
}
public Integer getOfferID() {
return this.offerID;
}
public void setOfferID(Integer offerID) {
this.offerID = offerID;
}
public Offer getOffers() {
return offer;
}
public void setOffers(Offer offer) {
this.offer = offer;
}
//more getters/setters
}
Offer class:
public class Offer
{
private Integer offerID;
private String offerDescription;
private String shortDescription;
private Integer TFTPOTGroup;
private Double discountPercentage;
public Integer getOfferID() {
return offerID;
}
public void setOfferID(Integer offerID) {
this.offerID = offerID;
}
//more getters/setters
}
Any help would be hugely appreciated
#Potential Unnecessary Projections Data:
Since you're not specifying SELECT clause in the query and putting explicit joins, hibernate will return 2 objects per row (Product, Offers), wherein Product object might already be populated with the Offer data due to underlying mapping associations.
Try adding select clause to the query and see if it casts correctly
Add SELECT p FROM ... to the query
I am trying to save to two tables in SQL server using Hibernate:
ORDER and ORDER_ITEM
I get an error:
Attribute "type" must be declared for element type "column".
Initial SessionFactory creation failed.org.hibernate.InvalidMappingException: Unable to read XML.
This produces a NullPointerException
If I understand correctly, this means that when I try to save to the order_item table, the getter for the foreign key is empty, but how would I set it if is designed to 'Autoincrement', I thought that hibernate would handle this in it's transaction.
Below are my POJO's and Hibernate mappings. I have omitted the getters and setters from this copy/paste, but they are present in my actual code
I am also successful in saving just to the ORDER table if I remove the set
Order.java:
public class Order {
public Order(){
super();
}
private int orderId;
private Set<LineItem> items;
private String strPhone;
private String strEmail;
private String strFirstName;
private String strLastName;
private String strParentFirstName;
private String strParentLastName;
private String strOrganizationName;
private String strOrganizationType;
private String strComment;
}
order.hbm.xml:
<hibernate-mapping>
<class name="dbobjects.Order" table="orders">
<id name="orderId" type="integer" column="order_id">
<generator class="increment"/>
</id>
<property name="strPhone" type="string" column="phone_number"/>
<property name="strFirstName" type="string" column="first_name"/>
<property name="strLastName" type="string" column="last_name"/>
<property name="strParentFirstName" type="string" column="parent_first_name"/>
<property name="strParentLastName" type="string" column="parent_last_name"/>
<property name="strOrganizationName" type="string" column="organization_name"/>
<property name="strOrganizationType" type="string" column="organization_type"/>
<property name="strComment" type="string" column="comments"/>
<set name="items" table="order_item" fetch="select" cascade="all">
<key>
<column name="orderId" type="java.lang.Integer"/>
</key>
<one-to-many class="dbobjects.LineItem"/>
</set>
</class>
LineItem.java:
public class LineItem {
public LineItem(){
super();
}
private int orderItemId;//this will be the primary key
private int orderId;//this is the foreign key to the order
private String age;
private String gender;
private String type;
private String itemSize;
private int itemQuantity;
}
lineItem.hbm.xml:
<id column="order_item_id" name="orderItemId" type="integer">
<generator class="increment"/>
</id>
<property column="age" name="age" type="string"/>
<property column="gender" name="gender" type="string"/>
<property column="quantity" name="itemQuantity" type="integer"/>
<property column="size" name="itemSize" type="string"/>
<property column="clothing_type" name="clothingType" type="string"/>
<many-to-one name="orderId" class="dbobjects.Order" fetch="select" column="order_id" type="java.lang.Integer"/>
This is where the error is thrown when I Instanciate the session:
**session = HibernateUtil.getSessionFactory().openSession();**←
try{
session.beginTransaction();
session.save(order);
session.getTransaction().commit();
So the question is: How do I handle this situation with 'autoincrement' primary key that is not accessible to another table as a foreign key
So, There were a few problems:
In order to submit a 'child' to the database, I needed to show who is the parent.
This means that my LineItem Class needed a
Order order;
property instead of a simple
private String orderID;
this was accomplished after the Order object was ready to be submitted to the DB but before the actual call:
for (LineItem item : order.getItems()) {
item.setOrder(order);
}
I also changed my DTD's from !DOCTYPE hibernate-configuration SYSTEM classpath://org/hibernate/hibernate-mapping-3.0.dtd"
to
!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"
Just add "type" attribute like this :
<column name="orderId" type="java.lang.Integer"/>
Try to replace :
<many-to-one name="orderId" column="order_id" class="dbobjects.Order" cascade="all">
<column name="orderId" type="java.lang.Integer"/>
</many-to-one>
by
<many-to-one name="orderId" column="order_id" class="dbobjects.Order" cascade="all"/>
I am trying to insert data into a Patient table, which has a many-to-one relationship with Site. Site has a one-to-many relationship with Patient.
However, I get a org.postgresql.util.PSQLException: ERROR: insert or update on table "patients" violates foreign key constraint "fk_427e3ubwhw8n7a4id3mmrmjgj"
Detail: Key (patient_id)=(31) is not present in table "sites".
I have tried to create a set of patients, add my patient to this set, create a site object, then use this object to set the patients. I am not sure which part of this is going wrong.
Session session = this.getFactory().openSession();
Transaction transaction = null;
try{
transaction = session.beginTransaction();
Date parsedDob = Date.valueOf(dob);
Date parsedDateReg = Date.valueOf(dateReg);
Site site = new Site();
site.setSiteId(1);
IPatient p = new Patient();
p.setFirstName(firstName);
p.setLastName(lastName);
p.setDob(parsedDob);
p.setDateRegistered(parsedDateReg);
p.setSite(site);
Set<IPatient> patientSet = new HashSet<IPatient>();
patientSet.add(p);
site.setPatients(patientSet);
session.save(site);
session.save(p);
transaction.commit();
}catch(Exception e){
e.printStackTrace();
}
My Patient.hbm.xml file is:
<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.example.model">
<class name="Patient" table="patients">
<id name="patientId" column="patient_id">
<generator class="sequence" />
</id>
<version name="version" column="version" />
<property name="firstName" column="first_name" />
<property name="lastName" column="last_name" />
<property name="dob" column="dob" />
<property name="gender" column="gender" />
<property name="dateRegistered" column="date_registered" />
<many-to-one name="site" class="com.example.model.Site" not-null="true" />
<set name="visits" cascade="all">
<key column="visit_id" />
<one-to-many class="Visit" />
</set>
</class>
My Site.hmx.xml is:
<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.example.model">
<class name="Site" table="sites">
<id name="siteId" column="site_id">
<generator class="sequence" />
</id>
<version name="version" column="version" />
<property name="name" column="name" />
<set name="patients" cascade="all">
<key column="patient_id" />
<one-to-many class="Patient" />
</set>
</class>
My Patient.java
public class Patient implements IPatient{
private Integer version;
private Integer patientId;
private Set<IVisit> visits;
private Site site;
private String firstName;
private String lastName;
private Date dob;
private Gender gender;
private Date dateRegistered;
public Patient(){
}
}
My Site.java
public class Site {
private Integer siteId;
private Integer version;
private Set<IPatient> patients;
private String name;
public Site(){
}
}
After the line below you should save your site object to db;
site.setSiteId(1);
session.save(site);
After that you can set site object to patient;
p.setSite(site);
I have a table (node) with 3 data
- id(pk)
- question
- result
and 2 foreign key (many-to-one)
- LEFT_ID
- RIGHT_ID
here my hbm
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.beans.Nodes" table="node">
<id name="id" type="int" access="field">
<column name="id" />
<generator class="assigned" />
</id>
<property name="question" type="java.lang.String">
<column name="question" />
</property>
<property name="result" type="java.lang.String">
<column name="result" />
</property>
<many-to-one column="LEFT_ID" name="left" class="com.beans.Nodes" insert="false" update="false"></many-to-one>
<many-to-one column="RIGHT_ID" name="right" class="com.beans.Nodes" insert="false" update="false"></many-to-one>
</class>
</hibernate-mapping>
and my bean with getter/setter on LEFT/RIGHT_ID
#Entity
#Table (name = "node")
public class Nodes
{
#Id
#GeneratedValue (strategy = GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column (name = "question")
private String question;
#Column ( name = "result")
private String result;
private Nodes LEFT_ID;
private Nodes RIGHT_ID;
public Nodes getLeftNodes()
{
return LEFT_ID;
}
public void setLeftNodes(Nodes LEFT_ID)
{
this.LEFT_ID=LEFT_ID;
}
public Nodes getRightNodes()
{
return RIGHT_ID;
}
public void setRifhtNodes(Nodes right)
{
this.RIGHT_ID=right;
}
}
But when i deploy my project, i have this error
**Query: ReadAllQuery(referenceClass=Nodes sql="SELECT id, question, result, LEFT_ID_id, RIGHT_ID_id FROM node")**
When hibernate is a select, he change the name of the column. LEFT_ID becomes LEFT_ID_id and inevitably he finds nothing !
Why hibernate change the name of the LEFT_ID column ?
thanks
I have the following classes:
Guide class:
public abstract class Guide
{
private Long idGuide;
private String name;
private GuideContainer parent;
/** GETTERS & SETTERS*/
}
GuideContainer:
public class GuideContainer extends Guide
{
private Guide children;
/** GETTER & SETTERS */
}
GuideFile:
public class GuideFile extends Guide
{
private String uri;
/**GETTERS & SETTERS */
}
with the following mappings:
For Guide:
<hibernate-mapping>
<class name="Guide" table="guides" abstract="true">
<id name="idGuide" type="integer" column="idGuide">
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String" column="name" />
<discriminator column="type" type="java.lang.String" />
<many-to-one class="GuideContainer" fetch="join" name="parent">
<column name="parent" />
</many-to-one>
</class>
</hibernate-mapping>
GuideFile:
<hibernate-mapping>
<subclass extends="Guide" name="GuideFile" discriminator-value="file">
<property name="uri" type="java.lang.String" column="uri" />
</subclass>
</hibernate-mapping>
GuideContainer:
<hibernate-mapping>
<subclass extends="Guide" name="GuideContainer" discriminator-value="container">
<set fetch="select" inverse="true" lazy="true" name="children" sort="unsorted" table="children">
<key>
<column name="parent" not-null="false" />
</key>
<one-to-many class="Guide" />
</set>
</subclass>
</hibernate-mapping>
When I try to get all the guides with a given parent
Query query = getSession().createQuery("from Guide g where parent = :parent order by type").setParameter("parent", parent);
List<Guide> guides= query.list();
return guides;
I am getting the following exception:
IllegalArgumentException occurred calling getter of Guide.idGuide
And after that:
java.lang.IllegalArgumentException: object is not an instance of declaring class
What am I doing wrong?
Solved. Query should have been:
from Guide g where parent.idGuide = :parent order by type