I have a parent class that has some shared fields and a child class that extends it.
#SuperBuilder(toBuilder = true)
#Data
public abstract class MultiTenantAuthoredDocument {
#Indexed
private String tenantId;
#CreatedDate
private LocalDateTime createdDate;
#LastModifiedDate
private LocalDateTime lastModifiedDate;
}
#Document(collection = "users")
#SuperBuilder(toBuilder = true)
#Data
#EqualsAndHashCode(callSuper = true)
#ToString(callSuper = true)
public class User extends MultiTenantAuthoredDocument {
#Id
private String id;
private String firstName;
private String lastName;
#Indexed
private String password;
#Indexed(unique = true)
private String userName;
#Indexed(unique = true)
private String email;
#Indexed
private List<UserRole> roles;
#Builder.Default
private boolean enabled = false;
}
However when running my unit tests, I get an unexpected exception when I do a findById and there's a result found namely:
No property b found on entity class be.moesmedia.erp.users.domain.User to bind constructor parameter to!
As I have no clue where property b is coming from it's pretty difficult to see what I'm doing wrong.
If anyone can help me point out what I'm doing wrong.
So I've figured out what was going wrong, Lombok generated a constructor that accepted an Object with the properties for the SuperBuilder class. Once I added #NoArgsConstructorto both the child and parent class, it works like a charm.
Related
I have the following embedabble
#Data
#Embeddable
public class BaseEntity {
#CreatedDate
#Column(name = "created_date")
private LocalDateTime createdDate;
#CreatedBy
#Column(name = "created_by")
private String createdBy;
}
Which I embed into my entity like so
#Entity
#Data
#NoArgsConstructor
#Table(name = "participant")
public class Participant {
#Id
#GeneratedValue
private UUID id;
#Embedded
private BaseEntity baseEntity;
}
And in my mapper I want to access the embedded properties of the Participant like so
#Mapping(target = "createdDate", source = "participant.createdDate")
ParticipantDto entityToDto(Participant participant);
But I get the following error message
error: The type of parameter "participant" has no property named "createdDate".
As mapping source I tried participant.basicEntitity.createdDate which also results in the same error message as well as not specifying any mapping so mapstruct can automap, which also results in the property not found error message
What is the standard object design for accepting a POST request from a client, saving the record to the database, and then returning a response back to the client? I'm working with the Spring framework.
Should I be sending back the entity and hiding properties that aren't necessary for the response?
#RestController
public class SomeController {
private final SomeService service;
#PostMapping(value = "/post/new", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<SomeEntity> post(#RequestBody final SomeEntity someEntity) {
SomeEntity savedEntity = service.save(someEntity);
return ResponseEntity.ok(savedEntity);
}
}
#Entity
#Table(name = "posts")
public class SomeEntity {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "title")
private String title;
#Column(name = "body")
#JsonIgnore
private String body;
#JsonIgnore
#Column(name = "deleted_ind")
private boolean deleted;
#JsonIgnore
#Column(name = "author")
private String author;
#Column(name = "created_at")
private LocalDateTime createdAt;
}
or would I accept some sort of POST request object that I convert to an entity, then re-assemble the entity into a response?
#JsonIgnoreProperties(ignoreUnknown = true)
public class SomePostRequestResource {
private String title;
private String body;
private String createdAt;
}
#RequiredArgsConstructor
#RestController
public class SomeController {
private final SomeService service;
private final SomeResourceAssembler resourceAssembler;
#PostMapping(value = "/post/new", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<SomePostRequestResource> post(
#RequestBody final SomePostRequestResource someResource
) {
SomeEntity savedEntity = service.convertToEntityAndSave(someResource);
SomePostRequestResource response = resourceAssembler.toResource(savedEntity);
return ResponseEntity.ok(response);
}
}
But then maybe I only want to send back the createdAt, would I hide the other properties in the SomePostRequestResource, or do I need another object to represent the response, which only has the property I want to send back?
I would also appreciate any book or article suggestions related to desigining objects for use with a RESTful API. I have seen articles concerning how to design and name the endpoints, but not so many concerning how to design the objects on the backend.
I would recommend you create a DTO class for the incoming/outgoing data containing the filed that are set/viewable by the client like:
public class SomeEntityIncomingDto {
private String title;
....
}
public class SomeEntityOutgoingDto {
private Long id;
private String title;
....
}
On the other hand, You won't need to map your persistence entities to DTOs and vice versa manually, you can use a library like ModelMapper or MapStruct that handles the conversion automatically.
I have a super Entity class like this:
#Getter
#Setter
#NoArgsConstructor
public class GenericEntity {
#Id
private Long id;
#JsonIgnore
#CreatedBy
private Long createdBy;
#JsonIgnore
#CreatedDate
private Long createdDate;
#JsonIgnore
#LastModifiedBy
private Long updatedBy;
#JsonIgnore
#LastModifiedDate
private Long updatedDate;
#JsonIgnore
#Version
private Integer version = 0;
}
and a Role class extends from GenericEntity like this:
#Getter
#Setter
#NoArgsConstructor
public class Role extends GenericEntity {
private String name;
private String desc;
private Integer sort;
}
And after that I have interface RoleRepo like this:
#Repository
public interface RoleRepo extends ReactiveCrudRepository<Role, Long>;
In Router function, I have 2 handler methods
private Mono<ServerResponse> findAllHandler(ServerRequest request) {
return ok()
.contentType(MediaType.APPLICATION_JSON)
.body(roleRepo.findAll(), Role.class);
}
private Mono<ServerResponse> saveOrUpdateHandler(ServerRequest request) {
return ok()
.contentType(MediaType.APPLICATION_JSON_UTF8)
.body(request.bodyToMono(Role.class).flatMap(role -> {
return roleRepo.save(role);
}), Role.class);
}
The method findAllHandler works fine, but the saveOrUpdateHandler throw exception like this:
java.lang.IllegalStateException: Required identifier property not found for class org.sky.entity.system.Role!
at org.springframework.data.mapping.PersistentEntity.getRequiredIdProperty(PersistentEntity.java:105) ~[spring-data-commons-2.2.0.M2.jar:2.2.0.M2]
at org.springframework.data.r2dbc.function.convert.MappingR2dbcConverter.lambda$populateIdIfNecessary$0(MappingR2dbcConverter.java:85) ~[spring-data-r2dbc-1.0.0.M1.jar:1.0.0.M1]
But when I move
#Id
private Long id;
from GenericEntity class to Role class, the two methods work fine.
Are there any Annations #MappedSuperclass/JPA in Spring Reactive Data like that
I wish the id field in GenericEntity for all extends class
Thanks for your help
Sorry, my English so bad
I had a similar problem and after some search, I didn't find an answer to your question, so I test it by writing code and the answer is spring data R2DBC doesn't need #Mappedsuperclass. it aggregates Role class properties with Generic class properties and then inserts all into the role table without the need to use any annotation.
The project crashes for one simple reason - it does not see the table (it seems to me), maybe the problem is in the #Table annotation
#Entity
#Table(name = "user")
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
public class User extends BaseEntity<Long> {
public enum Roles {
ADMIN
}
private String firstName;
private String lastName;
#Column(name = "username")
private String username;
#Convert(converter = PurshasedProductConverter.class)
private List<PurshasedProduct> purshasedProducts;
private String email;
private String activationCode;
#Convert(converter = AttachmentConverter.class)
private Attachment userAvatar;
public Attachment getUserAvatar() {
return userAvatar;
}
public void setUserAvatar(Attachment userAvatar) {
this.userAvatar = userAvatar;
}
#JsonProperty(access = Access.WRITE_ONLY)
private String password;
#JsonProperty(access = Access.WRITE_ONLY)
private String temporaryPassword;
#Convert(converter = StringArrayConverter.class)
private String[] roles;
private Date lastPasswordReset;
private Date dateCreated;
private Date dateUpdated;
private Date validatyTime;
private Boolean active;}
I used to have #Table (name = "\" user \ ""), but this created a lot of other problems for me, now as you see in the code, but it doesn't work. Here is the error itself Caused by: org.postgresql.util.PSQLException: ERROR: column user0_.id does not exist
some advise adding schema to the table annotation, but this does not help me
I also faced this problem and including schema name in my #Table annotation solved the problem:
#Table(name = "user", schema="mySchema")
i have an jpa entity like this.
#Entity
#Table(name = "location")
#Data
public class Location {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
#Column(name = "LOCATION_ID", unique = true)
#NotEmpty(message = "Please Enter Location ID")
private String name;
#Column(name = "LOCATION_DESCRIPTION")
#NotEmpty(message = "Please Enter Location Description")
private String description;
#ManyToOne
#NotNull(message = "Please Choose a Building")
Building building;
#Version
Long version;
}
and the repository like this.
public interface LocationRepository extends PagingAndSortingRepository<Location, Long> {
Location findByName(#Param("name") String name);
}
i am using spring data rest i am able to create location with rest api by providing the following payload
{
"name":"adminxxxxx","description":"adminxxx" , "building": "http://localhost:8080/buildings/2"
}
now i am trying to write my custom controller which will persist the entity. this is my custom controller
#ExposesResourceFor(Location.class)
#RepositoryRestController
#BasePathAwareController
public class LocationController {
#Autowired
LocationRepository locationDao;
#Autowired
LocationResourceAssembler resourceAssembler;
#Value("${buildings.error.messages.uniqueconstraintviolation}")
String uniqueConstrainMessage;
static final String TAG = LocationController.class.getSimpleName();
#RequestMapping(value="locations",method = org.springframework.web.bind.annotation.RequestMethod.POST)
public ResponseEntity<?> save(#RequestBody #Valid Location location) {
try {
location = locationDao.save(location);
LocationResource b = resourceAssembler.toResource(location);
return ResponseEntity.ok().body(b);
} catch (DataIntegrityViolationException e) {
if (locationAlreadyExists(location.getName()))
throw new LocationAlreadyExistException(uniqueConstrainMessage, location);
else
throw new RuntimeException("Some Error Occured");
}
}
i am getting this error
exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.alamdar.model.Building: no String-argument constructor/factory method to deserialize from String value ('http://localhost:8080/buildings/2')
at [Source: java.io.PushbackInputStream#5d468b16; line: 3, column: 60] (through reference chain: com.alamdar.model.Location["building"])</div></body></html>
can anyone please help?
I am not sure why you are writing a custom controller however the issue would appear to be that you do not have a default no args constructor so Jackson cannot instantiate an instance.
This is because you are using Lombok's #Data annotation:
https://projectlombok.org/features/Data.html
You should also annotate you class with #NoArgsConstructor to have a default no-args constructor generated:
#Entity
#Table(name = "location")
#Data
#NoArgsConstructor
public class Location {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
#Column(name = "LOCATION_ID", unique = true)
#NotEmpty(message = "Please Enter Location ID")
private String name;
#Column(name = "LOCATION_DESCRIPTION")
#NotEmpty(message = "Please Enter Location Description")
private String description;
#ManyToOne
#NotNull(message = "Please Choose a Building")
Building building;
#Version
Long version;
}