Spring MVC ModelAttribute values being lost

Question

I'm running into a situation where my model attribute is losing values between pages.

I've got two controller methods that handle GET and POST requests respectively.

GET Method

@RequestMapping(value = "/checkout/billing", method = RequestMethod.GET)
    public String getBillingPage(Model model, final HttpServletRequest request) throws CMSItemNotFoundException {
   // other code

   checkoutForm.setCustomFieldsForm(customFieldsForm);
   model.addAttribute("checkoutForm", checkoutForm);

   // other code
}

Debug View After GET Method completes

POST Method

@RequestMapping(value = "/checkout/billing", method = RequestMethod.POST)
    public String submitPayment(
            @Valid @ModelAttribute("checkoutForm") final CheckoutForm checkoutForm,
            final BindingResult bindingResult,
            Model model,
            final HttpServletRequest request,
            final HttpServletResponse response) throws CMSItemNotFoundException 
    {}

Debug View When POST Method is Invoked

The 1234 comes from the user entering that data in the form field. The other values should still be there and not null though.

What could be happening here?

Stefaan Neyts · Accepted Answer · 2018-02-22 22:16:41Z

2

Your model is not stored in the session. Each request creates a new model object. That's why it's empty.

You can add your model as a session attribute. Please find the documentation here https://docs.spring.io/spring/docs/3.2.x/spring-framework-reference/html/mvc.html#mvc-ann-sessionattrib

answered Feb 22, 2018 at 22:16

Stefaan Neyts

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