I am working on a Spring boot application (MVC, JPA) and it should return different attributes for different requests. I found the @JsonView annotation and it seems to work. But do I need to annotate each attribute with a basic view?
Example:
Entity1
@Entity
public class Entity1 implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@JsonView(JsonViews.ExtendedView.class)
private String name;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "entity1", fetch = FetchType.EAGER)
List<Entity2> entities2;
@JsonView(JsonView.ExtendedView.class)
@OneToMany(cascade = CascadeType.ALL, mappedBy = "entity1", fetch = FetchType.LAZY)
List<Entity3> entities3;
}
entity2
@Entity
public class Entity2 implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
}
Entity3
@Entity
public class Entity3 implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
}
Views
public class JsonViews {
public static class BasicView { }
public static class ExtendedView extends BasicView { }
}
controller
@RequestMapping(method = RequestMethod.GET)
@JsonView(JsonViews.BasicView.class)
public @ResponseBody List<Entity1> index() {
return repositoryEntity1.findAll();
}
This is a cropped example, but I think this relates to the problem. I expect the controller to return identifiers and a list of objects Entity2. But it returns an empty object with "No properties." If I annotate every attribute of every class participating in this query, it seems to work, but is this really needed or a better solution? Is there any way to define "DefaultView"?
thank
: JpaRepository, , Entity3.