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;
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 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?
I have list of filtered Id as following:
filteredId=[5,44,221,34,111...]
and class Device.java:
#NotBlank
private String applicationId;
// #NotBlank
private String deviceTypeId;
#NotBlank
private String uid;
#NotBlank
private String name;
private String userId;
private String nodeId;
private String externalId;
private String softwareReleaseId;
private boolean enabled = CoreConstant.DEFAULT_ENABLED;
private boolean nameOverridden = KronosConstants.NAME_OVERRIDDEN_DEFAULT;
private Map<String, String> info = new HashMap<>();
//Getter Setter
I want to fetch all Devices which have deviceTypeId equals filteredId
I am doing something like this:
Query query = new Query();
for (int i = 0; i < filteredId.size(); i++) {
query.addCriteria(Criteria.where(filteredId.get(i)).is(device.getId()));
}
return this.MongoOperations.find(query, Device.class);
Can anyone help me with what changes I need?
try
List<Integer> filteredId = List.of(5,44,221,34,111);
Criteria criteria = Criteria.where("deviceTypeId").in(filteredId);
return mongoOperations.find(Query.query(criteria), Device.class);
I use Spring JPA ( Hibernate ) and have bunch of entities which are mapped onto tables.
When I use an entity to write I need many fields in it (see an example below). But when I read, I wanna sometimes read only particular fields like first/last name. How can I perform it using Spring data JPA ? ( because due to CrudRepository nature it returns the whole entity)
#Entity
#Table(name="PERSON")
#AttributeOverride(name = "id", column = #Column(name = "ID_PERSON"))
public class Person extends BaseEntity implements Serializable {
private static final long serialVersionUID = 1L;
#Column(name="LAST_NAME", length = 100, nullable = false)
private String lastName;
#Column(name="FIRST_NAME", length = 50, nullable = false)
private String firstName;
#Column(name="MIDDLE_NAME", length = 50)
private String middleName;
#Column(name="BIRTHDAY", nullable = false)
#Temporal(value = TemporalType.DATE)
private Date birthday;
#ManyToOne(fetch = FetchType.LAZY, optional = true)
#JoinColumn(name = "ID_SEX")
private Sex sex;
public Person() {
super();
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getMiddleName() {
return middleName;
}
public void setMiddleName(String middleName) {
this.middleName = middleName;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public Sex getSex() {
return sex;
}
public void setSex(Sex sex) {
this.sex = sex;
}
}
There are various possibilities.
With Spring Data JPA you can use projection (that's the name when you only select certain fields/columns of an entity/table).
You can return List of Object[] or a DTO or an Interface.
For example with interface it looks like this:
interface NamesOnly {
String getFirstname();
String getLastname();
}
interface PersonRepository extends Repository<Person, UUID> {
Collection<NamesOnly> findByLastname(String lastname);
}
As you can see the return value most not be of type Person.
Please check out the documentation:
https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#projections
I was faced with a similar issue and I resorted to this:
Let's say you have your entity FooEntity related to repository FooRepository
To only get certain fields, let's say firstName and lastName using key I had to create a custom query in the FooRepository
In this manner
#Query("select new FooEntity(f.firstName, f.lastName) from FooEntity f where f.key = :key")
Optional<FooEntity> findCustomByKey(#Param("key") BigInteger key);
You also have to ensure that the FooEntity has the constructor accepting the values that you only want to be set or returned in this manner:
public FooEntity(String firstName, String lastName){
// Ensure the constructor is not called with null values
notNull(firstName, "Method called with null parameter (firstName)");
notNull(lastName, "Method called with null parameter (lastName)");
this.firstName = firstName;
this.lastName = lastName;
}
Please the full code below:
public class FooEntity implements Serializable {
#Id
#Column(name = "key")
private BigInteger key;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#Column(name = "birth_date")
private Date birthDate;
#Column(name = "hash")
private String hash;
public FooEntity(String firstName, String lastName){
// Ensure the constructor is not called with null values
notNull(firstName, "Method called with null parameter (firstName)");
notNull(lastName, "Method called with null parameter (lastName)");
this.firstName = firstName;
this.lastName = lastName;
}
// Getters and Setters
}
public interface FooRepository extends JpaRepository<FooEntity, BigInteger>{
#Query("select new FooEntity(f.firstName, f.lastName) from FooEntity f where f.key = :key")
Optional<FooEntity> findCustomById(#Param("key") BigInteger key); // This one only returns two set fields firstName and LastName and the rest as nulls
Optional<FooEntity> findById(BigInteger key) // This one returns all the fields
}
I am studying spring boot data using this API SWAPI, I did almost things but now I dont know how to map the relationship about two lists, above you can see my code and entities.
Entity Film
#Data
#Entity
public class Film extends Persistent<Long> {
private String title;
#JsonProperty(value = "episode_id")
private int episodeId;
#JsonProperty(value = "opening_crawl")
#Column(columnDefinition = "CLOB")
private String openingCrawl;
private String director;
private String producer;
#JsonDeserialize(converter = StringToLocalDateConverter.class)
#JsonProperty(value = "release_date")
private LocalDate releaseDate;
#JsonDeserialize(converter = ApiURLToEntitiesConverter.class)
#ManyToMany(mappedBy = "films")
private List<Person> characters;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime created;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime edited;
private String url;
}
Entity Person
#Data
#Entity
public class Person extends Persistent<Long> {
private String name;
private String height;
private String mass;
#JsonProperty(value = "hair_color")
private String hairColor;
#JsonProperty(value = "skin_color")
private String skinColor;
#JsonProperty(value = "eye_color")
private String eyeColor;
#JsonProperty(value = "birth_year")
private String birthYear;
private String gender;
#JsonDeserialize(converter = ApiURLToEntityConverter.class)
#JoinColumn(name = "planet_id", foreignKey = #javax.persistence.ForeignKey(name = "none"))
#OneToOne(optional = true)
private Planet homeworld;
#JsonDeserialize(converter = ApiURLToEntitiesConverter.class)
#ManyToMany
#JoinTable(
name = "film_person",
joinColumns = #JoinColumn(name = "film_fk", referencedColumnName = "id", nullable = true),
inverseJoinColumns = #JoinColumn(name = "person_fk", referencedColumnName = "id", nullable = true))
private List<Film> films;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime created;
#JsonDeserialize(converter = StringToLocalDateTimeConverter.class)
private LocalDateTime edited;
private String url;
}
I am trying to use the spring jpa method to saveAll
#Override
public List<T> insertAll(List<T> entities) {
for (Persistent entity : entities) {
Set<ConstraintViolation<Persistent>> violations = validator.validate(entity);
if (violations != null && !violations.isEmpty()) {
throw new ConstraintViolationException(violations);
}
}
return repository.saveAll(entities);
}
Converter Method
#Override
public List convert(List<String> s) {
if (s == null || s.isEmpty()) {
return null;
}
List objetos = new LinkedList();
for (String url : s) {
if (url.contains("people")) {
objetos.add(Util.getPerson(url));
}
if (url.contains("planets")) {
objetos.add(Util.getPlanet(url));
}
if (url.contains("starships")) {
objetos.add(Util.getStarship(url));
}
if (url.contains("vehicles")) {
objetos.add(Util.getVehicle(url));
}
if (url.contains("species")) {
objetos.add(Util.getSpecie(url));
}
}
return objetos;
}
}
Util method
public static Person getPerson(String characterApiUrl) {
if (characterApiUrl == null || characterApiUrl.isEmpty()) {
return null;
}
Person person = new Person();
person.setId(StringUtil.getIdEntity(characterApiUrl, "people/"));
return person;
}
The relationship table is being created but no populated