i was trying to make a simple board with spring boot and data jpa that users can make a post and admins can make boards. this is the code of api i made that creates a board.

@PostMapping
    public ResponseEntity<BoardResponseDto> createBoard(@RequestBody @Validated BoardNameRequestDto boardNameRequestDto) {
        long boardId = boardService.createBoard(boardNameRequestDto);

        return ResponseEntity.created(URI.create("/board/" + boardId))
                .body(
                        BoardResponseDto.builder()
                                .code(ms.getMessage("suc.code", null, null))
                                .message(ms.getMessage("suc.message", null, null))
                                .build()
                );
}

uri over there is mapped with board details page. so when i send my request, it should create a board and redirect to board details page of the board that i created.

and this is the code of board details page.

@GetMapping("/{boardId}")
    public ResponseEntity<BoardResponseDto> getBoard(@PathVariable long boardId, Pageable pageable) {
        Board findBoard = boardService.findBoard(boardId).orElseThrow(NoBoardException::new);

        List<PostListDto> boardPost = postService.getBoardPost(boardId, pageable);
        return ResponseEntity.ok(
                BoardResponseDto.builder()
                        .code(ms.getMessage("suc.code", null, null))
                        .message(ms.getMessage("suc.message", null, null))
                        .boardName(findBoard.getBoardName())
                        .postCount(boardPost.size())
                        .postList(boardPost)
                        .build()
        );
}

so this is actual response of board details page and the expected response of redirection from creating a board.

{
    "code": "SUC",
    "message": "Success",
    "boardName": "test",
    "postCount": 0,
    "postList": []
}

but this is what i actually got when i send a request to create a board.

{
    "code": "SUC",
    "message": "Success",
    "boardName": null,
    "postCount": 0,
    "postList": null
}

as far as i know redirecting to a page is same as accessing to the page with GET method, but it seems to be different.. help me please. sorry about my poor english