I updated some files to set up the connection with the MySQ database, after that the program won’t start. Full errors list: 2022-08-23 19:50:54.927 ERROR 25220 — [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Failed to initialize JPA EntityManagerFactory: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags: [com.bn.market.entities.User.productList, com.bn.market.entities.User.roles] 2022-08-23… Read More After adding spring connection with second database, I catched some errors

I try to get field tags from the entity Article: @Getter @Setter @Entity @ToString @NoArgsConstructor @AllArgsConstructor @Table(name = "articles") public class Article { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; @Embedded private Author author; @Column(unique = true) private String title; private String content; @ElementCollection(targetClass = String.class, fetch = FetchType.EAGER ) @CollectionTable(name = "tags", joinColumns =… Read More Hibernate @Query throw syntax error at or near "."

I’m trying to study Spring more specific Spring Data but i have a question about the use of interface Repository and its derivatives classes and i asking you help for clarify them. @Repository public interface GuestRepository extends CrudRepository<Guest, Long>, {} For example i see this code example extends CrudRepository but i see the using of… Read More Spring implements to kinds of Repository interface

I try to build a todoapp with the function to upload files. Now i want to can upload files on a task or simply upload files without tasks. For that i need the @PathVariable Annotation to be optional. This is my Controller: @PostMapping("/upload/{taskId}") private ResponseEntity<String> uploadFile(@CurrentUser UserPrincipal userPrincipal, @RequestParam("file") MultipartFile[] file, @PathVariable(required = false) String… Read More Java can't upload file with @Pathvariable optional

In a Spring Boot Rest API, I was able to avoid infinite loop with @JsonIgnore. In the postman result, the related list (many side) show null. When i will use this endpoint in Angular, will i be able to display that related list even if it is skipped by @JsonIgnore in my postman? Consisidering a… Read More Avoiding Infinite Loop Spring Boot