Spring MVC: implementing @ModelAttribute Not Populating Nested Objects in Controller
I'm prototyping a solution and Does anyone know how to I'm prototyping a solution and I've hit a wall trying to I'm working with an scenario with Spring MVC where the `@ModelAttribute` is not correctly populating nested objects in my form submission... I have a `User` class that contains a nested `Address` object, and I'm trying to bind the form data to these objects. Despite having the appropriate getters and setters, the `Address` object remains null when I submit the form. Here's the relevant portion of my controller: ```java @Controller public class UserController { @GetMapping("/user-form") public String showForm(Model model) { model.addAttribute("user", new User()); return "userForm"; } @PostMapping("/submit-user") public String submitForm(@ModelAttribute User user, BindingResult result) { if (result.hasErrors()) { return "userForm"; } // Process user return "redirect:/success"; } } ``` And here are my model classes: ```java public class User { private String name; private Address address; // Getters and Setters } public class Address { private String street; private String city; // Getters and Setters } ``` In the corresponding form (`userForm.html`), I have the following fields: ```html <form action="/submit-user" method="post"> <input type="text" name="name" placeholder="Name" /> <input type="text" name="address.street" placeholder="Street" /> <input type="text" name="address.city" placeholder="City" /> <button type="submit">Submit</button> </form> ``` When I submit the form, the `User` object is populated correctly with the name, but the `address` object is still null. I’ve tried various configurations and ensured that the input names are correct, including the `address.street` and `address.city`. Still, I'm receiving no errors, and nothing is changing in the model state. Is there something I'm missing in the binding process? Any help would be greatly appreciated! I'm developing on Ubuntu 22.04 with Java. Could someone point me to the right documentation? I'm developing on CentOS with Java. Hoping someone can shed some light on this. I appreciate any insights!