I have a controller with method, which returns PagedResource, which looks like this:
@RequestMapping(value = "search/within", method = RequestMethod.POST)
public @ResponseBody PagedResources within(@RequestBody GeoJsonBody body,
Pageable pageable, PersistentEntityResourceAssembler asm) {
// GET PAGE
return pagedResourcesAssembler.toResource(page, asm);
}
Now, I want to add that method as a link to the root resource, so I do the following:
public RepositoryLinksResource process(RepositoryLinksResource repositoryLinksResource) {
repositoryLinksResource.add(linkTo(methodOn(ShipController.class).within(null, null, null)).withRel("within"));
return repositoryLinksResource;
}
Which works and I get my link, however it add that link without pagination parameters. So it look like this:
"within": {
"href": "http://127.0.0.1:5000/search/within"
},
and I want to turn it into:
"within": {
"href": "http://127.0.0.1:5000/search/within{?page, size}"
},
This previous question on stackoverflow suggests that after fixing the corresponding issue on GitHub it should work by default, however, it doesn't.
What am I doing wrong ?
I had success using PagedResourcesAssembler
. Let's say your entity is called
MyEntity
. Your within
method should return HttpEntity<PagedResources<MyEntity>>
.
Your within
method should look something similar to the example shown below.
@RequestMapping(value = "search/within", method = RequestMethod.POST)
@ResponseBody
public HttpEntity<PagedResources<MyEntity>>
within(@RequestBody GeoJsonBody body,Pageable pageable,
PagedResourcesAssembler assembler) {
// GET PAGE
Page<MyEntity> page = callToSomeMethod(pageable);
return new ResponseEntity<>(assembler.toResource(page), HttpStatus.OK);
}
Here is a simple example. In this example, the response looked like the one shown below,
{
"_embedded": {
"bookList": [
{
"id": "df3372ef-a0a2-4569-982a-78c708d1f609",
"title": "Tales of Terror",
"author": "Edgar Allan Poe"
}
]
},
"_links": {
"self": {
"href": "http://localhost:8080/books?page=0&size=20"
}
},
"page": {
"size": 20,
"totalElements": 1,
"totalPages": 1,
"number": 0
}
}
If you're interested in creating the paginated link manually, here's the code snippet you can use,
Page<MyEntity> page = callToSomeMethod(pageable);
ControllerLinkBuilder ctrlBldr =
linkTo(methodOn(ShipController.class).within(body, pageable, asm));
UriComponentsBuilder builder = ctrlBldr.toUriComponentsBuilder();
int pageNumber = page.getPageable().getPageNumber();
int pageSize = page.getPageable().getPageSize();
int maxPageSize = 2000;
builder.replaceQueryParam("page", pageNumber);
builder.replaceQueryParam("size", pageSize <= maxPageSize ?
page.getPageable().getPageSize() : maxPageSize);
Link selfLink =
new Link(new UriTemplate(builder.build().toString()), "self");
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