Currently I am experiencing rather nasty problem and can't find a way to get rid of it. I am using Thymeleaf and Spring Boot in my project. I was looking at various topics here and on other forums, with no luck in solving the above. I have a view with two, not nested forms, with separate submit buttons and separate actions:

<form id="bidForm" th:action="@{'/auction/bid/' + ${auctionDto.id}}" th:object="${bidDto}" method="post"> /* more html code here */ </form> <form id="buyoutForm" th:action="@{'/buyout/confirm-buyout'}" th:object="${buyoutDto}" method="post"> /* more html code here */ </form>

The view is generated by following method from the controller:

@GetMapping("/get/{id}") public ModelAndView getAuction(@PathVariable String id) { ModelAndView modelAndView = new ModelAndView(Templates.AuctionTemplates.ITEM); modelAndView.addObject("auctionDto", getAuctionService.getOne(id)); modelAndView.addObject("bidDto", new BidDto()); modelAndView.addObject("buyoutDto", new BuyoutDto()); return modelAndView; }

The method mappings specified in th:action are in two different controllers. Controller with action for "bidForm":

@Controller @RequestMapping("/auction") public class AuctionController { @PostMapping("/bid/{id}") public ModelAndView bid(@PathVariable String id, @ModelAttribute("bidDto") @Valid BidDto bidDto, BindingResult bindingResult, Principal principal) { /* more code here */ } }

and for "buyoutForm":

@Controller @RequestMapping("/buyout") public class BuyoutController { @PostMapping("/confirm-buyout") public ModelAndView confirmBuyout(@Valid @ModelAttribute("buyoutDto") BuyoutDto buyoutDto) { ModelAndView modelAndView = new ModelAndView(); return modelAndView; } }

Now, to the problem: when I submit the "bidForm" using corresponding button, I get an error:

Neither BindingResult nor plain target object for bean name "buyoutDto"

I have no idea why Spring expects an object of "BuyoutDto" class in the "bid" method. It's the first time I am experiencing this problem. Could you help me solve it, please? Regards, Lukas.