I have a
#Data
#Document(collection = "req_language")
public class Language implements ChangeDto {
#Id
private String id = UUID.randomUUID().toString();
private String name;
private String code;
private Boolean active = Boolean.TRUE;
private Boolean deleted = Boolean.FALSE;
private Date changeAt = Date.from(Instant.now());
private String changedBy;
private String correlationId = UUID.randomUUID().toString();
}
And
#Data
#Document(collection = "req_locale")
public class Locale implements ChangeDto {
#Id
private String id = UUID.randomUUID().toString();
private String description;
private Language language;
private String code;
private String fatherCode;
private Boolean active = Boolean.TRUE;
private Boolean deleted = Boolean.FALSE;
private Date changedAt = Date.from(Instant.now());
private String changedBy;
private String correlationId = UUID.randomUUID().toString();
}
With a simple repository
#Repository
#JaversSpringDataAuditable
public interface LocalesRepository extends MongoRepository<Locale, String>, LocalesCustom {
List<Locale> findByCode(String code);
}
If a try to use the findByCode, I receive this error:
No converter found capable of converting from type [java.lang.String] to type [XXX.Language]
When I try to use query in the LocalesCustom, for example (empty)
Query query = new Query();
List<Locale> localeList = mongoTemplate.find(query, Locale.class);
Same error
I have tried #DBRef in Language, and popped others errors (I couldn't query by the language code, query.addCriteria(Criteria.where("language.code")) in LocalesRepository.
There's a right way to do it?
Related
I have been working with MapStruct some days now and haven't yet achieved what i need.
As part of the exercises with Spring, I am writing a small app that will display information about the movies (title, description, director, etc.) and additionally the movie category.
Therefore, I created an additional Entity called Category, so that (e.g. an admin) could add or remove individual category names.
Movie Entity:
public class Movie {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String title;
private String content;
private String director;
private int year;
#ManyToMany
#Column(nullable = false)
private List<Category> category;
private LocalDate createdAt;
}
Category Entity
public class Category {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String categoryName;
private LocalDate createdAt;
}
I packed it all into MapStruct and DTOs.
MovieDTORequest.java
public class MovieDTORequest {
private String title;
private String content;
private String director;
private List<Category> category;
private int year;
}
MovieDTOResponse.java
public class MovieDTOResponse {
private String title;
private String content;
private String director;
private String categoryName;
private int year;
private LocalDate createdAt;
}
And MovieMapper.java
#Mapper(componentModel = "spring")
public interface MovieMapper {
#Mapping(target = "categoryName", source = "category")
MovieDTOResponse movieToMovieDTO(Movie movie);
#Mapping(target = "id", source = "title")
#Mapping(target = "createdAt", constant = "")
Movie movieRequestToMovie(MovieDTORequest request);
#Mapping(target = "id", source = "title")
#Mapping(target = "createdAt", constant = "")
void updateMovie(MovieDTORequest request, #MappingTarget Movie target);
String map(List<Category> value);
}
However, I have a problem with Mapper. First, I got the error:
"Can't map property "List<Category> category" to "String categoryName". Consider to declare/implement a mapping method: "String map(List<Category> value)"
and when I wrote it in Mapper, I have one more error:
Can't generate mapping method from iterable type from java stdlib to non-iterable type.
I am asking for help, because I am already lost.
You should define default implementation for String map(List<Category> value) inside MovieMapper interface, what would Mapstruct use to map property List<Category> category to String categoryName. For example:
#Mapper(componentModel = "spring")
public interface MovieMapper {
#Mapping(target = "categoryName", source = "category")
MovieDTOResponse movieToMovieDTO(Movie movie);
default String map(List<Category> value){
//TODO: Implement your own logic that determines categoryName
return "Movie Categories";
}
}
I have an entity class that is self referencing itself. For example, a document can be linked to a parent document.
#Entity
#Table(name = "documents")
public class DocumentEntity {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#JsonIgnore
#JsonManagedReference
#ManyToOne(fetch = FetchType.LAZY)
private DocumentEntity parentDocument;
#JsonBackReference
#OneToMany(mappedBy = "parentDocument", fetch = FetchType.LAZY)
private Set<DocumentEntity> documents;
#Column(nullable = false, unique = true)
private String documentId;
#Column(nullable = false)
private String fileName;
}
In my entry point / controller layer :
#GetMapping(
path = "/{fileId}",
produces = { MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE }
)
public DocumentResponse getParentDocument(#PathVariable("fileId") String fileId) {
modelMapper = createModelMapper();
DocumentDto documentDto = documentService.getParentDocument(fileId);
DocumentResponse documentResponse = modelMapper.map(documentDto, DocumentResponse.class);
documentResponse.getDocuments().forEach(document -> System.out.println(document.getDocumentId()));
return documentResponse;
}
In my Service layer :
#Override
public DocumentDto getParentDocument(String documentId) {
DocumentDto documentDtoResponse = new DocumentDto();
ModelMapper modelMapper = new ModelMapper();
modelMapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
DocumentEntity storedDocumentEntity =
documentRepository.findByDocumentIdAndParentDocumentNull(documentId);
if(storedDocumentEntity.getDocumentId().isEmpty() || storedDocumentEntity.getDocumentId().isBlank()) {
throw new AppFileNotFoundException("Oops file not found");
}
documentDtoResponse = modelMapper.map(storedDocumentEntity, DocumentDto.class);
return documentDtoResponse;
}
In the repository:
Now I'm making a sql request in a repository interface that extends JpaRepository.
The application allow to have a parent document with child documents and child documents cannot have child documents.
#Repository
public interface DocumentRepository extends JpaRepository<DocumentEntity, Long> {
DocumentEntity findByDocumentIdAndParentDocumentNull(String documentId);
}
I also tried to implement the method using JPQL :
#Query("SELECT d FROM DocumentEntity d WHERE d.documentId = :documentId AND d.parentDocument IS NULL")
DocumentEntity findByDocumentIdAndParentDocumentNull(String documentId);
This query allow to get parent documents and child documents.
My code implementation separates response and database by using a DTO layer.
Issue:
My issue is that I obtain an infinite recursion. I think i'm using #JsonManagedReference and #JsonBackReference correctly. Even adding the same annotations to DTO pojo do not solve issue. If i add those annotation to response POJO, then I do not obtain child documents.
Could not write JSON: Infinite recursion (StackOverflowError); nested exception is com.fasterxml.jackson.databind.JsonMappingException
Inially I have a DTO class that also self refers to itself.
public class DocumentDto implements Serializable {
private String filePath;
private String mimeType;
private String documentType;
private DocumentDto parentDocument;
Set<DocumentDto> documents;
}
I created a second class without properties that are causing problems;
public class DocumentChildDto implements Serializable {
private String filePath;
private String mimeType;
private String documentType;
}
In the DocumentDto I simply replaced the DocumentDto with DocumentChildDto.
public class DocumentDto implements Serializable {
private String filePath;
private String mimeType;
private String documentType;
private DocumentChildDto parentDocument;
Set<DocumentChildDto> documents;
}
It's more a hack than a technical solution but it works fine. Here childDocumentDto object won't load the parentDocument.
I have a nested object like
public class SQSMessage implements Serializable {
private String type;
private boolean isEntity;
private String eventType;
private SystemInfo systemInfo;
private DomainAttributes domainAttributes;
#Data
public static class SystemInfo implements Serializable {
private String identifier;
private String ownedBy;
private Payload payload;
private EntityTags entityTags;
private long createdOn;
private String createdBy;
private long version;
private long lastUpdatedOn;
private String lastUpdatedBy;
private String attrEncKeyName;
#Data
public static class Payload implements Serializable {
private String bucketName;
private String objName;
private String encKeyName;
private byte[] payloadBytes;
private byte[] decryptedBytes;
private byte[] sanitizedBytes;
}
#Data
public static class EntityTags implements Serializable {
private List<Tag> tags;
#Data
public static class Tag implements Serializable {
private String tagName;
private String tagValue;
}
}
}
#Data
public static class DomainAttributes implements Serializable {
private String updatedByAuthId;
private String saveType;
private String docName;
private String ceDataType;
private String year;
private String appId;
private String formSetId;
private String appSku;
private String deviceId;
private String deviceName;
}
}
I would like to query the collection of SQSObjects by applying a filter like
ResultSet<SQSMessage> results = parser.retrieve(indexedSQSMessage, "SELECT * FROM indexedSQSMessage WHERE type='income' and DomainAttributes.saveType in ('endSession', 'cancelled')or (DomainAttributes.countryCode is null or DomainAttributes.countryCode='US'");
Is that possible using CQEngine? if yes.. please send me the examples.
The reason why I want o make that as sql... where clause is dynamic for various use cases.
Your example is more complicated than it needs to be for the question, so I am just skimming it. (Read about SSCCE)
However generally this kind of thing should be possible. See this related question/answer for how to construct nested queries: Can CQEngine query an object inside another object
If you set up attributes like that, you should be able to use them in SQL queries as well as programmatically.
I have the following Spring boot service for an object of type Report -
#Service
public class ReportService {
#Autowired
private ReportRepository reportRepository;
#Autowired
private UserRepository userRepository;
/*get all reports */
public List<Report> getAllReports(){
return reportRepository.findAll();
}
/*get a single report */
public Report getReport(Long id){
return reportRepository.getOne(id);
}
//other similar methods....
}
The problem arises while retrieving a single Report. If a report ID is send which doesn't exist, the following error is generated...
DefaultHandlerExceptionResolver : Failed to write HTTP message:
org.springframework.http.converter.HttpMessageNotWritableException: Could not
write JSON: Unable to find com.interact.restapis.model.Report with id 16;
nested exception is com.fasterxml.jackson.databind.JsonMappingException:
Unable to find com.interact.restapis.model.Report with id 16 (through
reference chain:
com.interact.restapis.model.Report_$$_jvst83c_1["fromUserId"])
Below is the code for my Report Controller
#RestController
public class ReportController {
#Autowired
private ReportService reportService;
//Get all reports
#GetMapping("/interactions")
public List<Report> getAllReports() {
return reportService.getAllReports();
}
//Get single report
#GetMapping("/interactions/{id}")
public ResponseEntity<Report> getReport(#PathVariable Long id) {
if(reportService.getReport(id) == null)
return new ResponseEntity<>(HttpStatus.NOT_FOUND);
return new ResponseEntity<>(reportService.getReport(id), HttpStatus.OK);
}
#PostMapping("/interactions")
public ResponseEntity<Report> addReport(#RequestBody Report report) {
Report report1 = reportService.addReport(report);
if(report1 == null)
return new ResponseEntity<>(report, HttpStatus.NOT_FOUND);
return new ResponseEntity<>(report1, HttpStatus.OK);
}
//Other request methods...
}
Below is the code for my Report Model class -
#Entity
#Table (name = "report")
#EntityListeners(AuditingEntityListener.class)
#JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
public class Report {
#Id
#Column (name = "id")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "from_user_id")
private Long fromUserId;
#Column(name = "to_user_id")
private Long toUserId;
#Column(name = "to_user_email")
private String toUserEmail;
#Column(name = "from_user_email")
private String fromUserEmail;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
#CreatedDate
private Date createdAt;
#Column(nullable = false)
private String observation;
#Column(nullable = false)
private String context;
private String recommendation;
#Column(nullable = false)
private String eventName;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
#Column(nullable = false)
private Date eventDate;
private boolean isAnonymous;
#Temporal(TemporalType.DATE)
#JsonFormat(pattern = "dd-MM-yyyy hh:mm:ss")
private Date acknowledgementDate;
#OneToMany(cascade = CascadeType.ALL, targetEntity = Action.class)
#JoinColumn(name = "report_id")
private List<Action> actionList;
#Value("${some.key:0}")
private int rating; //Range 0 to 4
private int type;
/*
Getter and setter methods...
*/
}
I want to know if reportRepository.getOne(Long id) returns null so that I can actually check if a particular report doesn't exist in the database. If not, how else can I implement the above?
The JpaRepository.getOne with throw EntityNotFoundException if it couldn't find a record with the given id.
You can use CrudRepository.findById (JpaRepository is a subclass of CrudRepository) which will return an Optional<Report> which can be empty if there are no record for the given id. You can use Optional.isPresent() to check whether it a Report is available or not and take actions accordingly.
Create a method in your ReportRepository.
It will return Report by matched id else return null.
public Optional<Report> findById(Long id);
Note: findById(Long id); should match with the property name in your Report entity.
I am assuming your Report entity is as follows:
public class Entity{
private Long id;
...
}
I am learning spring data neo4j and spring .I want to search fulltext,for example I have three Movies (sky,sky1,sky2),when i search "sky",it return sky,sky1,sky2.firt i use repository below
package com.oberon.fm.repository;
#Repository
public interface MovieRepository extends GraphRepository<Movie> {
Movie findById(String id);
Page<Movie> findByTitleLike(String title, Pageable page);
}
My controller below
#RequestMapping(value = "/movies", method = RequestMethod.GET, headers = "Accept=text/html")
public String findMovies(Model model, #RequestParam("q") String query) {
log.debug("1");
if (query != null && !query.isEmpty()) {
Page<Movie> movies =movieRepository.findByTitleLike(query, new PageRequest(0, 20));
model.addAttribute("movies", movies.getContent());
} else {
model.addAttribute("movies", Collections.emptyList());
}
model.addAttribute("query", query);
addUser(model);
return "/movies/list";
}
these does not work well,i think somewhere might be wrong,but i dont know,if you have any idea,tell me thanks! by the way,it throw exception java.lang.NullPointerException.
My Movie entity
#NodeEntity
public class Movie {
#GraphId
Long nodeId;
#Indexed(indexType = IndexType.FULLTEXT, indexName = "id")
String id;
#Indexed(indexType = IndexType.FULLTEXT, indexName = "search")
String title;
String description;
#RelatedTo(type = "DIRECTED", direction = INCOMING)
Set<Director> directors;
#RelatedTo(type = "ACTS_IN", direction = INCOMING)
Set<Actor> actors;
#RelatedToVia(type = "ACTS_IN", direction = INCOMING)
Iterable<Role> roles;
#RelatedToVia(type = "RATED", direction = INCOMING)
#Fetch
Iterable<Rating> ratings;
private String language;
private String imdbId;
private String tagline;
private Date releaseDate;
private Integer runtime;
private String homepage;
private String trailer;
private String genre;
private String studio;
private Integer version;
private Date lastModified;
private String imageUrl;