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fixed entity relationships and prepared 2 basic queries

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This commit is contained in:
Marcin Hutek 2023-12-29 15:06:50 +01:00
parent 771698b40b
commit 35b6a89702
4 changed files with 56 additions and 15 deletions
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16
src/main/java/org/example/FilmInfoModel.java
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@ -86,9 +86,13 @@ public class FilmInfoModel {
this.filmCategory = filmCategory;
}
// @ManyToOne
// @JoinColumn(name = "language_id")
// private FilmLanguageModel filmLanguageModel;
@ManyToOne
@JoinColumn(name = "language_id", referencedColumnName = "language_id", insertable=false, updatable = false)
private FilmLanguageModel filmLanguageModel;
public FilmLanguageModel getFilmLanguageModel() {
return filmLanguageModel;
}
// @ManyToOne
// @JoinColumn(name = "category_id")
@ -102,9 +106,9 @@ public class FilmInfoModel {
return filmModel;
}
public void setFilmModel(FilmModel filmModel) {
this.filmModel = filmModel;
}
// public void setFilmModel(FilmModel filmModel) {
// this.filmModel = filmModel;
// }
// @Override
// public String toString() {

9
src/main/java/org/example/FilmLanguageModel.java
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@ -2,6 +2,7 @@ package org.example;
import jakarta.persistence.*;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
@Entity
@ -34,8 +35,12 @@ public class FilmLanguageModel {
this.filmLanguage = filmLanguage;
}
// @OneToMany(mappedBy = "filmLanguageModel", fetch = FetchType.LAZY)
// private Set<FilmInfoModel> filmInfoSet = new HashSet<>();
@OneToMany(mappedBy = "filmLanguageModel", fetch = FetchType.LAZY)
private List<FilmInfoModel> filmInfoModel;
public FilmInfoModel getFilmInfo() {
return (FilmInfoModel) filmInfoModel;
}
@Override
public String toString() {

3
src/main/java/org/example/Main.java
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@ -14,7 +14,8 @@ public class Main {
Queries queries = new Queries();
// queries.getAllFilms();
queries.printFilmDetails();
// queries.printFilmDetails();
queries.getFilmLanguage();

43
src/main/java/org/example/Queries.java
View File

@ -14,7 +14,7 @@ public class Queries {
Configuration configuration = new Configuration();
configuration.configure();
try (SessionFactory sessionFactory = configuration.buildSessionFactory()){
try (SessionFactory sessionFactory = configuration.buildSessionFactory()) {
try (Session session = sessionFactory.openSession()) {
session.beginTransaction();
List<FilmModel> films = session.createQuery("FROM FilmModel", FilmModel.class)
@ -32,7 +32,7 @@ public class Queries {
Configuration configuration = new Configuration();
configuration.configure();
try (SessionFactory sessionFactory = configuration.buildSessionFactory()){
try (SessionFactory sessionFactory = configuration.buildSessionFactory()) {
try (Session session = sessionFactory.openSession()) {
session.beginTransaction();
List<FilmModel> films = session
@ -63,9 +63,10 @@ public class Queries {
e.printStackTrace();
}
}
public void printFilmDetails() {
try (Session session = HibernateUtil.getSessionFactory().openSession()) {
String hql = "SELECT f.id, f.filmTitle, fi.releaseYear FROM FilmModel f JOIN f.filmInfo fi";
String hql = "SELECT f.id, f.filmTitle, fi.filmDescription FROM FilmModel f JOIN f.filmInfo fi";
// String hql = "SELECT a, b FROM FilmModel a LEFT JOIN FETCH a.filmInfo b";
Query<Object[]> query = session.createQuery(hql, Object[].class);
List<Object[]> results = query.getResultList();
@ -88,11 +89,11 @@ public class Queries {
int filmId = (int) result[0];
String filmTitle = (String) result[1];
int releaseYear = (int) result[2];
String filmDescription = (String) result[2];
System.out.println("Film ID: " + filmId);
System.out.println("Film Title: " + filmTitle);
System.out.println("Release Year: " + releaseYear);
System.out.println("Description: " + filmDescription);
System.out.println("-----------------------------------");
// FilmInfoModel filmInfo = filmMo.getFilmInfo();
// String description = filmInfo.getDescription();
@ -115,4 +116,34 @@ public class Queries {
}
}
}
}
public void getFilmLanguage() {
try (Session session = HibernateUtil.getSessionFactory().openSession()) {
String hql = "SELECT f.id, f.filmDescription, fl.filmLanguage FROM FilmInfoModel f JOIN f.filmLanguageModel fl";
// String hql = "SELECT a, b FROM FilmModel a LEFT JOIN FETCH a.filmInfo b";
Query<Object[]> query = session.createQuery(hql, Object[].class);
List<Object[]> results = query.getResultList();
int limit = 10;
int counter = 0;
for (Object[] result : results) {
if (counter >= limit) {
break;
}
int filmId = (int) result[0];
String filmDescription = (String) result[1];
String filmLanguage = (String) result[2];
System.out.println("Film ID: " + filmId);
System.out.println("Film Description: " + filmDescription);
System.out.println("Language: " + filmLanguage);
System.out.println("-----------------------------------");
}
}
}
}