Spring Data JPA problems with Hibernate and stack trace - spring

Question

I'm following along the Spring Data JPA course over at amigoscode.com and I ran into an issue. I'm creating a small JPA app and I have the following issues. And just to make sure, I checked out the code from the instructor's GitHub and ran that code and got the exact same problem. So, here goes:
The app has repositories for the two classes Student and StudentIdCard and app class with a main method and all of that. In that class we're returning a Bean that's a CommandLineRunner.
Here are the two classes:
package com.example.demo;
import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;
#Entity(name = "Student")
#Table(
name = "student",
uniqueConstraints = {
#UniqueConstraint(name = "student_email_unique", columnNames = "email")
}
)
public class Student {
#Id
#SequenceGenerator(
name = "student_sequence",
sequenceName = "student_sequence",
allocationSize = 1
)
#GeneratedValue(
strategy = GenerationType.SEQUENCE,
generator = "student_sequence"
)
#Column(
name = "id",
updatable = false
)
private Long id;
#Column(
name = "first_name",
nullable = false,
columnDefinition = "TEXT"
)
private String firstName;
#Column(
name = "last_name",
nullable = false,
columnDefinition = "TEXT"
)
private String lastName;
#Column(
name = "email",
nullable = false,
columnDefinition = "TEXT"
)
private String email;
#Column(
name = "age",
nullable = false
)
private Integer age;
#OneToOne(
mappedBy = "student",
orphanRemoval = true
)
private StudentIdCard studentIdCard;
public Student(String firstName,
String lastName,
String email,
Integer age) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
this.age = age;
}
public Student() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
#Override
public String toString() {
return "Student{" +
"id=" + id +
", first_name='" + firstName + '\'' +
", last_name='" + lastName + '\'' +
", email='" + email + '\'' +
", age=" + age +
'}';
}
}
package com.example.demo;
import javax.persistence.*;
#Entity(name = "StudentIdCard")
#Table(
name = "student_id_card",
uniqueConstraints = {
#UniqueConstraint(
name = "student_id_card_number_unique",
columnNames = "card_number"
)
}
)
public class StudentIdCard {
#Id
#SequenceGenerator(
name = "student_id_card_sequence",
sequenceName = "student_id_card_sequence",
allocationSize = 1
)
#GeneratedValue(
strategy = GenerationType.SEQUENCE,
generator = "student_id_card_sequence"
)
#Column(
name = "id",
updatable = false
)
private Long id;
#Column(
name = "card_number",
nullable = false,
length = 15
)
private String cardNumber;
#OneToOne(
cascade = CascadeType.ALL
)
#JoinColumn(
name = "student_id",
nullable = false,
referencedColumnName = "id",
foreignKey = #ForeignKey(
name = "student_id_fkey"
)
)
private Student student;
public StudentIdCard() {
}
public StudentIdCard(Long id, String cardNumber) {
this.id = id;
this.cardNumber = cardNumber;
}
public StudentIdCard(String cardNumber, Student student) {
this.cardNumber = cardNumber;
this.student = student;
}
public Long getId() {
return id;
}
public String getCardNumber() {
return cardNumber;
}
#Override
public String toString() {
return "StudentIdCard{" +
"id=" + id +
", cardNumber='" + cardNumber + '\'' +
", student=" + student +
'}';
}
}
Here's the commandlinerunner:
#Bean
CommandLineRunner commandLineRunner(StudentRepository studentRepository, StudentIdCardRepository studentIdCardRepository) {
return args -> {
Faker faker = new Faker();
String firstName = faker.name().firstName();
String lastName = faker.name().lastName();
String email = String.format("%s.%s#amigoscode.com", firstName, lastName);
Student student = new Student(firstName, lastName, email, faker.number().numberBetween(17, 55));
StudentIdCard studentIdCard = new StudentIdCard("123456789", student);
studentIdCardRepository.save(studentIdCard);
studentRepository.findById(1L).ifPresent(System.out::println);
studentIdCardRepository.findById(1L).
ifPresentOrElse(System.out::println,
() -> {
System.out.println("Student with id 1 does not exist!");
});
etc etc
When I run the code two things go wrong. The server starts and does everything. But the statement studentRepository.findById(1L) (and yes, we know the student has id 1) we should get the studentIdCard too because we have a onetoone relationship with the studentIdCard that's mapped in the student class. And according to the Hibernate output in the console it should work, but it doesn't:
Hibernate:
select
student0_.id as id1_1_0_,
student0_.age as age2_1_0_,
student0_.email as email3_1_0_,
student0_.first_name as first_na4_1_0_,
student0_.last_name as last_nam5_1_0_,
studentidc1_.id as id1_2_1_,
studentidc1_.card_number as card_num2_2_1_,
studentidc1_.student_id as student_3_2_1_
from
student student0_
left outer join
student_id_card studentidc1_
on student0_.id=studentidc1_.student_id
where
student0_.id=?
Student{id=1, first_name='Shamika', last_name='Treutel', email='Shamika.Treutel#amigoscode.com', age=24}
Just the student-columns are showing up in the results. Why is that?
Also, the second problem is that even before we got this far, I've always gotten a weird stack trace that I don't understand (don't understand DDL). It doesn't affect the server working, but I'd assume it's not right. I ran the instructor's repo from IntelliJ and it gives the same stack trace.
Stack trace:
Hibernate:
alter table book
drop constraint student_book_fkey
2021-06-26 18:06:18.391 WARN 42876 --- [ main] o.h.t.s.i.ExceptionHandlerLoggedImpl : GenerationTarget encountered exception accepting command : Error executing DDL "
alter table book
drop constraint student_book_fkey" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "
alter table book
drop constraint student_book_fkey" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applyConstraintDropping(SchemaDropperImpl.java:331) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:230) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:145) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:468) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.2.jar:2.5.2]
at com.example.demo.DemoApplication.main(DemoApplication.java:18) ~[classes/:na]
Caused by: org.postgresql.util.PSQLException: ERROR: relation "book" does not exist
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2552) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2284) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:322) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:481) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:401) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:322) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:308) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:284) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:279) ~[postgresql-42.2.22.jar:42.2.22]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
... 35 common frames omitted
Hibernate:
alter table student_id_card
drop constraint student_id_fkey
2021-06-26 18:06:18.393 WARN 42876 --- [ main] o.h.t.s.i.ExceptionHandlerLoggedImpl : GenerationTarget encountered exception accepting command : Error executing DDL "
alter table student_id_card
drop constraint student_id_fkey" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "
alter table student_id_card
drop constraint student_id_fkey" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlString(SchemaDropperImpl.java:375) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applySqlStrings(SchemaDropperImpl.java:359) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.applyConstraintDropping(SchemaDropperImpl.java:331) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.dropFromMetadata(SchemaDropperImpl.java:230) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.performDrop(SchemaDropperImpl.java:154) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:126) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.internal.SchemaDropperImpl.doDrop(SchemaDropperImpl.java:112) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:145) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:318) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:468) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.8.jar:5.3.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:338) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-2.5.2.jar:2.5.2]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332) ~[spring-boot-2.5.2.jar:2.5.2]
at com.example.demo.DemoApplication.main(DemoApplication.java:18) ~[classes/:na]
Caused by: org.postgresql.util.PSQLException: ERROR: relation "student_id_card" does not exist
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2552) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2284) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:322) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:481) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:401) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:322) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:308) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:284) ~[postgresql-42.2.22.jar:42.2.22]
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:279) ~[postgresql-42.2.22.jar:42.2.22]
at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:94) ~[HikariCP-4.0.3.jar:na]
at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java) ~[HikariCP-4.0.3.jar:na]
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54) ~[hibernate-core-5.4.32.Final.jar:5.4.32.Final]
... 35 common frames omitted

Answer 1

I think this is happening because of spring.jpa.hibernate.ddl-auto configuration which u have made in application.properties or application.yaml.
use
spring.jpa.hibernate.ddl-auto=update
or
spring:
jpa:
hibernate:
ddl-auto: update