我请求帮助是因为thymeleaf做了一件奇怪的事：这是我的表格：

<form action="#" th:action="@{/add-new-board}" method="post">

    <p>Board name: <input type="text" th:name="board" th:field="${board.name}" /></p>
    <p th:if="${#fields.hasErrors('board.name')}" th:errors="${board.name}">Name Error</p>

    <p>Section #1 name: <input type="text" th:name="section" th:field="${section.name}" /></p>
    <p th:if="${#fields.hasErrors('section.name')}" th:errors="${section.name}">Name Error</p>

    <p><input type="submit" value="Submit" /> <input type="reset" value="Reset" /></p>
</form>

这是我的控制器：

@GetMapping(path = "/add-new-board")
public String addNewBoardForm(Model model) {
    model.addAttribute("board", new Board());
    model.addAttribute("section", new Section());
    return "fragments/forms/add-new-board";
}

@PostMapping(path = "/add-new-board")
public String addNewBoardSubmit(@Valid @ModelAttribute Board board,
                                @Valid @ModelAttribute Membership membership,
                                @Valid @ModelAttribute Section section,
                                @AuthenticationPrincipal UserDetailsImpl principal,
                                BindingResult result,
                                RedirectAttributes attributes) {
    if (result.hasErrors()) {
        attributes.addFlashAttribute("create_board_fail", "Check if you have all fields");
        return "fragments/forms/add-new-board";
    } else {
        board.setCreated_at(LocalDateTime.now());
        Slugify slug = new Slugify();
        board.setSlug(slug.parse(board.getName()));
        boardRepository.save(board);

        User user = userRepository.findByEmail(principal.getEmail()).get();
        membership.setMember_type(MemberType.MANAGER);
        membership.setBoardId(board);
        membership.setUserId(user);
        membershipRepository.save(membership);

        section.setBoard(board);
        section.setColor(ColorType.BLUE_BASIC);
        section.setOrdering(1);
        sectionRepository.save(section);

        attributes.addFlashAttribute("create_board_success", "You successfully added a new board!");
        return "redirect:/";
    }

因此，我的目标是将第一个输入到“board”表的文本插入到“name”列，并将第二个输入到“section”表的文本插入到“name”列。所以这个专栏的标题是相似的。现在，当我运行代码、填充输入并提交它时，我将进入我的数据库：
数据库表img
其中“aaa”是我在第一个输入中写的，而“bbb”是在第二个输入中写的