Data from thymelaf form not saving properly into db - forms

Question

I'm dealing with saving an entity from thymealaf form to database.
My current approach.
Thymeleaf form in register.html
<form action="save" th:method="post" th:action="#{save}" th:object="${customer}">
<input type ="text" th:field="*{firstName}" placeholder="First Name" /><br />
<input type ="text" th:field="*{lastName}" placeholder="Last Name" /><br />
<input type="email" th:field="*{emailAddress}" placeholder="Email" /><br />
<input type="password" th:field="*{password}" placeholder="Password" /><br />
<input style="text-align: center" type="submit" value="Register" /> </form>
Controller methods:
#RequestMapping("/home")
public String home(Model model){
model.addAttribute("customer", new Customer());
return "register";
}
#RequestMapping("save")
public String save(#ModelAttribute(value = "customer") Customer customer) {
customerRepository.save(customer);
return "saved";
}
There is an issue with data binding as you can see in the attached screenshot

Answer 1

Problem solved. Just needed to change dependencies from:
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring5</artifactId>
<version>3.0.9.RELEASE</version>
</dependency>
to
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>2.1.4.RELEASE</version>
</dependency>

Answer 2

as I can see you did not mention the name in the input field thymelaf binds data using the name
so u have to add a name in the input field as follow
<form action="save" th:method="post" action="save" th:object="${customer}">
<input type ="text" name="first_name" placeholder="First Name" /><br />
<input type ="text" name="last_name" placeholder="Last Name" /><br />
<input type="email" name="email_address" placeholder="Email" /><br />
<input type="password" name="password" placeholder="Password" /><br />
<input style="text-align: center" type="submit" value="Register" /> </form>
note:- name in the input field is should match with your names from the table