I have just learnt how to do Pageable with Repository Java ( I have a BBDD MySQL) . I basically use DAO with my model (pregunta) and I cast my model to my DTO (preguntaDTO).
public Page<PreguntaDTO> getAllPreguntasPorPagina(Pageable pageable){
return preguntaRepository.findAll(pageable).map(PreguntaDTO::fromEntity);
}
My controller receives the parameters for the pagination.
@GetMapping("/listadoPreguntasPaginadas")
public ResponseEntity<Page<PreguntaDTO>> listadoPreguntasPaginadas(
@RequestParam(defaultValue = "0") int page,
@RequestParam(defaultValue = "10") int size,
@RequestParam(defaultValue = "pregunta") String order,
@RequestParam(defaultValue = "true") boolean asc
) {
Page<PreguntaDTO> preguntaDTOpaginada= preguntaService.listadoPreguntasPageables(PageRequest.of(page, size, Sort.by(order)));
return new ResponseEntity<Page<PreguntaDTO>>(preguntaDTOpaginada, HttpStatus.OK);
}
But now, I need To use parameters in my JQUERY ( text and id) . I´ll try to explain it better. My model is:
@Entity
@Table (name="preguntas")
@EntityListeners(AuditingEntityListener.class) // sin esto no genera fecha automatica
@Getter
@Setter
public class Pregunta implements Serializable {
private static final long serialVersionUID = 5191280932150590610L;
@Id // definimos clave primaria
@GeneratedValue(strategy=GenerationType.AUTO) // que se genere de forma automatica y crezca
private Long id;
@Temporal(TemporalType.TIMESTAMP)
@LastModifiedDate
private Date createAt;
@NotBlank // que no este campo en blanco, validar documento
@NotNull(message = "Nombre no puede ser nulo")
private String pregunta;
private Boolean activa=true;
private Long deEnfermedadById;//ID de Enfermedad
private Long createdById;//ID de usuario
private Boolean denunciado=false;
private String aux="Campo auxiliar sin usar";
}
My search, in addition to be pageable, must return all my questions ( pregunta )that have:
- in field deEnfermedadById with an id (deEnfermedadById :number) and,
- of text ( cadena: string) in field pregunta ( type, pregunta :string)
I know how to look for that kind of list with Entity Management, BUT here I don`t know tu use pageable.
above you can see how I did it.
public List<Pregunta> listadoPreguntasByIdEnfermedad(Long idEnf, String cadena) {
List<Pregunta> lista = new ArrayList<>();
String sql = "select * from sanihelp.preguntas where "
+ "de_enfermedad_by_id = ?";
if (cadena != null) {
sql = sql.concat(" and pregunta like ? ");
};
try {
Query query = em.createNativeQuery(sql);
int indice=1;
query.setParameter(indice , idEnf);
if (cadena != null) {
query.setParameter(++indice, "%" + cadena + "%");
}
for (Object o : query.getResultList()) {
Object[] objeto = (Object[]) o;
Pregunta modelo = new Pregunta();
modelo.setId(((BigInteger) objeto[0]).longValue()); modelo.setActiva(Boolean.getBoolean(String.valueOf(objeto[1])));
modelo.setAux(String.valueOf(objeto[2]));
modelo.setCreateAt((java.util.Date)objeto[3]);
modelo.setCreatedById(((BigInteger) objeto[4]).longValue());
modelo.setDeEnfermedadById(((BigInteger) objeto[5]).longValue()); modelo.setDenunciado(Boolean.getBoolean(String.valueOf(objeto[6])));
modelo.setPregunta(String.valueOf(objeto[7]));
lista.add(modelo);
}
} catch (Exception e) {
System.out.println("excepcion lanzada" + e);
}
return lista;
}
How you can see, I am a bit Stuck. With Entity Management I cannot do pagination and with Repository Java I don´t know how to add to my pageable method some parameters ( id and text )
Thank you for your help.
:-)
Above some extra information of the interface .
package com.uned.project.sanitaUned.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.uned.project.sanitaUned.model.Pregunta;
@Repository
public interface PreguntaRepository extends JpaRepository<Pregunta, Long> {
}
that extends of :
*/
@NoRepositoryBean
public interface JpaRepository<T, ID> extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
and that extends of pageable
@NoRepositoryBean
public interface PagingAndSortingRepository<T, ID> extends CrudRepository<T, ID> {
/**
* Returns all entities sorted by the given options.
*
* @param sort
* @return all entities sorted by the given options
*/
Iterable<T> findAll(Sort sort);
/**
* Returns a {@link Page} of entities meeting the paging restriction provided in the {@code Pageable} object.
*
* @param pageable
* @return a page of entities
*/
Page<T> findAll(Pageable pageable);
}
I tried to do :
@Repository
public interface PreguntaRepository extends JpaRepository<Pregunta, Long> {
/* */
@Query ("select * from sanihelp.preguntas where de_enfermedad_by_id = :de_enfermedad_by_id")
Page <Pregunta> findAllWithFields(Pageable pageable , @Param ("de_enfermedad_by_id") long de_enfermedad_by_id );
}
But it didn't work, it failed in the server when I started with the next error.
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-04-07 18:16:44.091 ERROR 8424 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'preguntaController': Unsatisfied dependency expressed through field 'preguntaService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'preguntaService': Unsatisfied dependency expressed through field 'preguntaDAO'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'preguntaDAO': Unsatisfied dependency expressed through field 'preguntaRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'preguntaRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract org.springframework.data.domain.Page com.uned.project.sanitaUned.repository.PreguntaRepository.findAllWithFields(org.springframework.data.domain.Pageable,long)!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
