Passing Spring pageable in get request - spring

Question

If I send a request from Spring application:
public ResponseEntity<RestResponsePage<Result>> readDocs(
Pageable pageable
) {
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.add("Authorization", getToken());
String requestUri =
baseAppUrl + "/api/k" + "?page={page}&pageSize={pageSize}&sort={sort}&pageable={pageable}";
Map<String, Object> urlParameters = new HashMap<>();
urlParameters.put("page", Integer.toString(pageable.getPageNumber()));
urlParameters.put("pageSize", Long.toString(pageable.getPageSize()));
urlParameters.put("sort", pageable.getSort());
urlParameters.put("pageable", pageable);
HttpEntity<Void> requestEntity = new HttpEntity<>(requestHeaders);
ResponseEntity<RestResponsePage<Result>> response = restTemplate.exchange( RestResponsePage
requestUri,
HttpMethod.GET,
requestEntity,
new ParameterizedTypeReference<RestResponsePage<Result>>() {},
urlParameters
);
return response;
}
to another Spring application:
#GetMapping("/")
#PageableAsQueryParam
public ResponseEntity<Page<Result>> getAll(
#RequestHeader("Authorization") String token,
#RequestParam("page") Integer page,
#RequestParam("pageSize") Integer pageSize,
#RequestParam("sort") String sort,
#RequestParam("pageable") Pageable pageable
) {
...
}
I have got an error saying:
Resolved [org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'org.springframework.data.domain.Pageable'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.lang.String' to required type 'org.springframework.data.domain.Pageable': no matching editors or conversion strategy found]
I know i can pass it seperately by fields like in example above:
page, pageSize etc.
But i want also to send Sort that's is inside Pageable object - that's also not correctly deserialized as a Type Sort.
How can I make it so Pageable is correctly deserialized ?
EDIT:
regarding answer, I added function like:
UriComponentsBuilder withPageable(UriComponentsBuilder builder,
Pageable pageable) {
builder.queryParam("page", pageable.getPageNumber()).queryParam("size",
pageable.getPageSize());
if (pageable.getSort() != null) {
StringBuilder sb = new StringBuilder();
pageable.getSort().forEach(order -> {
sb.append(order.getProperty()).append(",").append(order.getDirection());
});
builder.queryParam("sort", sb.toString());
}
return builder;
}
to make sort properly deserialize.

Answer 1

Do not need to use #RequestParam("pageable").
Pageable Abstract interface for pagination information.
pageSize, pageNumber, sort already provided on the Pageable
Sample Controller
#Controller
public class Controller {
#GetMapping("/...")
public List<...> findAll(Pageable pageable) {
log.debug("pageable: {}", pageable);
// ...
}
}
MockRequetBuilders
RequestBuilder request = MockMvcRequestBuilders.get("/url")
.param("page", "1")
.param("size", "5")
.param("sort", "name,DESC"); // column, ASC|DESC
ResultActions actions = mockMvc.perform(request);
actions.andExpect(...);
RestTemplate
URI uri = UriComponentsBuilder.fromHttpUrl("/url")
.queryParam("page", pageable.getPageNumber())
.queryParam("size", pageable.getPageSize())
.queryParam("sort", pageable.getSort())
.build()
.toUri();
HttpHeaders headers = new HttpHeaders();
headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
HttpEntity<?> entity = new HttpEntity<>(headers);
ResponseEntity<...> response = restTemplate.exchange(uri, HttpMethod.GET, entity, ...);
https://reflectoring.io/spring-boot-paging/
https://cursos.alura.com.br/forum/topico-no-primary-or-single-unique-constructor-found-for-interface-org-springframework-data-domain-pageable-195442