how to extract data from ElementCollection - database

Question

I am trying to extract data from an ElementCollection that is contained in StandartFont.
public class DBFonts {
#Id
#GeneratedValue(strategy= GenerationType.AUTO)
private long id;
private String nameFont;
#ElementCollection
#CollectionTable(
name="StandartFont",
joinColumns=#JoinColumn(name="Fonts_id")
#Lob #Basic(fetch = FetchType.LAZY)
#Column(length=100000)
private List<byte[]> StandartFonts; }
Repository:
public interface FontRepo extends JpaRepository<DBFonts,Long> {
List<byte[]> findByStandartFonts(Long fonsId);
}
HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
Hibernate: alter table font add constraint FKpcplr5ixrmh5lbjx0e6peoqo4 foreign key (user_id) references usr (id)
Hibernate: alter table standart_font add constraint FKq7nxy6see56tp2y997fwmsewq foreign key (fonts_id) references font (id)
2018-12-06 16:15:54.338 INFO 6168 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-12-06 16:15:54.884 WARN 6168 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'addFont': Unsatisfied dependency expressed through field 'fontRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fontRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List spring_mvc.entity.FontRepo.findByStandartFonts(java.lang.Long)! Unable to locate Attribute with the the given name [standartFonts] on this ManagedType [spring_mvc.entity.DBFonts]
2018-12-06 16:15:54.884 INFO 6168 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2018-12-06 16:15:54.886 INFO 6168 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2018-12-06 16:15:54.896 INFO 6168 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2018-12-06 16:15:54.898 INFO 6168 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2018-12-06 16:15:54.916 INFO 6168 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-12-06 16:15:54.928 ERROR 6168 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'addFont': Unsatisfied dependency expressed through field 'fontRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fontRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List spring_mvc.entity.FontRepo.findByStandartFonts(java.lang.Long)! Unable to locate Attribute with the the given name [standartFonts] on this ManagedType [spring_mvc.entity.DBFonts]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:586) ~[spring-beans-5.0.9.RELEASE.jar:5.0.9.RELEASE]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.5.RELEASE.jar:2.0.5.RELEASE]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fontRepo': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.List spring_mvc.entity.FontRepo.findByStandartFonts(java.lang.Long)! Unable to locate Attribute with the the given name [standartFonts] on this ManagedType [spring_mvc.entity.DBFonts]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1699) ~[spring-beans-5.0.9.RELEASE.jar:5.0.9.RELEASE]
It does not work, how to extract data correctly?
Will it work?:
select standart_fonts FROM standart_font where fonts_id=?
How to write this in #Query

Answer 1

Spring cant find attribute with name standartFonts in your class DBFonts and that's why it can't create been with your repository
Unable to locate Attribute with the the given name [standartFonts] on
this ManagedType [spring_mvc.entity.DBFonts]
Spring using reflection get method name (findByStandartFonts) from your repository and parse it: findBy its means select and StandartFonts spring parse as standartFonts and it try to find this field in your #Entity
PS. In id field, please, use Long instead of long. It's good practice.
And use camelCase in your java code...