Hibernate Error Message: Save the transient instance before flushing-CodePudding

While trying to create a one to many relationship I am geeting "Save the transient instance before flushing" error message usign Spring JPA connection to PostgreSQL. "Alquiler"(One) is the name of my entity and the other is "Peliculas"(To Many)

Notice that I already added cascade = CascadeType.ALL And still getting the issue. This is the class where I am trying to create the relationship. Help!

package com.Project.Movies.model;

import java.util.Date;
import java.util.List;

import javax.persistence.*;

@Entity
@Table(name = "Alquiler")
public class Alquiler {
@Id
@SequenceGenerator(
        name = "alquiler_seq",
        sequenceName = "alquiler_seq",
        allocationSize = 1
        )
@GeneratedValue(
        strategy = GenerationType.SEQUENCE,
        generator = "alquiler_seq"
        )

private Long id;

int dias;
float costopordia;
String formapago;
Date fechaAlquiler;

@Column
@ElementCollection(targetClass=Pelicula.class)
private List<Pelicula> peliculas;

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "id")
private Socio socio;


public Alquiler() {
    super();
}

public Alquiler(int dias, float costopordia, String formapago, Date fechaAlquiler, List<Pelicula> pelicula, Socio socio) {
    super();
    this.dias = dias;
    this.costopordia = costopordia;
    this.formapago = formapago;
    this.fechaAlquiler = fechaAlquiler;
    this.peliculas = pelicula;
    this.socio = socio;
}

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public Date getFechaAlquiler() {
    return fechaAlquiler;
}

public void setFechaAlquiler(Date fechaAlquiler) {
    this.fechaAlquiler = fechaAlquiler;
}

@OneToMany(targetEntity=Pelicula.class, cascade = CascadeType.ALL,orphanRemoval = true)
public List<Pelicula> getPeliculas() {
    return peliculas;
}

public void setPeliculas(List<Pelicula> pelicula) {
    this.peliculas = pelicula;
}

public Socio getSocio() {
    return socio;
}

public void setSocio(Socio socio) {
    this.socio = socio;
}

boolean CrearAlquiler() {
    return true;
}

public int getDias() {
    return dias;
}

public void setDias(int dias) {
    this.dias = dias;
}

public float getCostopordia() {
    return costopordia;
}

public void setCostopordia(float costopordia) {
    this.costopordia = costopordia;
}

public String getFormapago() {
    return formapago;
}

public void setFormapago(String formapago) {
    this.formapago = formapago;
}

}

Alquiler Config Class

package com.Project.Movies.model;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.boot.CommandLineRunner;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AlquilerConfig {
@Bean
CommandLineRunner commandLineRunnerA(IAlquilerRepository ialquilerRepository)
{
    
return args ->{
    
    List<Pelicula> myList = new ArrayList<Pelicula>();
    
    Pelicula shawshank = new Pelicula("The Shawshank Redemption",1994,"2hr 22mins","Two imprisoned men bond over a number of years, finding solace and eventual redemption through...","Frank Darabont","B","Drama",3);
    Pelicula inception = new Pelicula("Inception",2010,"2hrs 28mins","Dom Cobb es un ladrón con una extraña habilidad para entrar a los sueños de la gente y robarles los secretos de sus subconscientes","Christopher Nolan","C","Science Fiction",4);
    Pelicula fightclub = new Pelicula("Fight Club",1999,"2hrs 19mins","Un empleado de oficina insomne, harto de su vida, se cruza con un vendedor peculiar...","David Fincher","C","Suspenso/Drama",2);                 
    
    myList.add(inception);
    
    myList.add(shawshank);
    myList.add(inception);
    myList.add(fightclub);
    
    Socio mariana= new Socio("Mariana Navidad","Arcos #34, Los Arcos","4446784563");
    Socio sebastian= new Socio("Sebastian Mendoza","Rios #38, Mares","4336784563");
    Socio roberto= new Socio("Roberto Obregon","Estrella #89, Universo","4556784563");
    
    Alquiler shawshankAlquiler = new Alquiler(3,30,"efectivo",new Date(),myList,mariana);
    Alquiler inceptionAlquiler = new Alquiler(5,25,"tarjeta",new Date(),myList,sebastian);
    Alquiler inceptionAlquiler2 = new Alquiler(5,25,"efectivo",new Date(),myList,roberto);
    
    ialquilerRepository.saveAll(List.of(shawshankAlquiler,inceptionAlquiler,inceptionAlquiler2));
};  
}

}

Error Message

java.lang.IllegalStateException: Failed to execute CommandLineRunner at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:794) ~[spring-boot-2.5.6.jar:2.5.6] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:775) ~[spring-boot-2.5.6.jar:2.5.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:345) ~[spring-boot-2.5.6.jar:2.5.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.6.jar:2.5.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.6.jar:2.5.6] at com.univaProject.UnivaMovies.UnivaMoviesApplication.main(UnivaMoviesApplication.java:11) ~[classes/:na] Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.univaProject.UnivaMovies.model.Pelicula; nested exception is java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.univaProject.UnivaMovies.model.Pelicula at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:371) ~[spring-orm-5.3.12.jar:5.3.12] at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:235) ~[spring-orm-5.3.12.jar:5.3.12] at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:566) ~[spring-orm-5.3.12.jar:5.3.12] at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:654) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:407) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.12.jar:5.3.12] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.12.jar:5.3.12] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.12.jar:5.3.12] at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:174) ~[spring-data-jpa-2.5.6.jar:2.5.6] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.12.jar:5.3.12] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.12.jar:5.3.12] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.12.jar:5.3.12] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.12.jar:5.3.12] at com.sun.proxy.$Proxy87.saveAll(Unknown Source) ~[na:na] at com.univaProject.UnivaMovies.model.AlquilerConfig.lambda$0(AlquilerConfig.java:39) ~[classes/:na] at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:791) ~[spring-boot-2.5.6.jar:2.5.6] ... 5 common frames omitted

CodePudding user response：

You said that you added the CascadeType. But you didn't add it to the Pelicula relation. When you try to save an Alquiler Hibernate finds that the Peliculas are not saved, and as it doesn't have the CascadeType it gives that exception.

Map it this way

@OneToMany(cascade = CascadeType.PERSIST)
private List<Pelicula> peliculas;