The content from pagination returns empty

Question

Using PagingAndSortingRepository the content returns with {} and right number of content from page url parameter. Example: My table has 20 rows and in url a put ?page=0&size=10. When returns in the postman the key content return

    "content": [
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {}
    ]

Debuging the request and return it has values. But is not showing. Don't know why.

my repository

public interface LocalUtilRepository extends PagingAndSortingRepository<LocalUtilModel, Integer> {
    Page<LocalUtilModel> findAll(Pageable pageable);
}

Spring boot version

<artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version> 

The result from request

{
    "content": [
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {},
        {}
    ],
    "pageable": {
        "sort": {
            "sorted": false,
            "unsorted": true,
            "empty": true
        },
        "offset": 0,
        "pageNumber": 0,
        "pageSize": 10,
        "unpaged": false,
        "paged": true
    },
    "totalPages": 2,
    "totalElements": 11,
    "last": false,
    "size": 10,
    "number": 0,
    "sort": {
        "sorted": false,
        "unsorted": true,
        "empty": true
    },
    "numberOfElements": 10,
    "first": true,
    "empty": false
}

My model

   @Entity(name = "EXPLOCALUTIL")
public class LocalUtilModel {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @NotNull
    @Size(min = 5, max = 255)
    @Column(name = "DESCLOCALUTIL")
    private String descLocalUtil;

    @Column(name = "COORD")
    private String coordenada;

    private String referencia;

    @NotNull
    @Column(name = "IDEXPFEIRA")
    private Integer idExpFeira;
} 

Answer 1

Based on your JSON response it is showing like "offset":0 .

Try to pass this in your repository pageable parameter.

PageRequest.of(0, 10) here 0 is the page number and 10 is offset.

Formula definition:

int start = pageNumber * offset + 1;

int end = start+offset.

So in our scenario the start will be 1 and end will 10. This will fetch the top 10 returns.

ResponseEntity.ok().body( localUtilRepository.findAll(PageRequest.of(0, 10))

Just pass your page in first Param and size in second Param.

Answer 2

我必须在模型类中使用@Data进行注释，因为我正在使用lombok 。