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Java Spring with Hibernate User Messages in Spring Displaying Validation Messages

Rebekah Smith
Rebekah Smith
7,263 Points

Protip for method POST handler, regarding Spring and Thymeleaf user input errors

POST handler method signatures should look exactly like Chris's:

    @RequestMapping(value = "/categories", method = RequestMethod.POST)
    public String addCategory(@Valid Category category, BindingResult result, RedirectAttributes redirectAttributes) {

If you include a Model parameter you will cry. It passes the compiler, but the handler is never hit, and there's no help from logs or browser network panel. This is wrong:

    @RequestMapping(value = "/categories", method = RequestMethod.POST)
    public String addCategory(@Valid Category category, Model model, BindingResult result, RedirectAttributes redirectAttributes) {
Anders Björkland
Anders Björkland
7,481 Points

Is this because Model is associated with HTTP GET method, and not POST?