I'm really new to spring boot, thymeleaf and spring mvc and I can't solve my problem. I move my real case to a minimal example to make it easier understand for you.
This is my really simple "Customer.java"-class:
@Entity
public class Customer {
@Id
@GeneratedValue
private Long id;
@Column(nullable = false)
private String firstName;
@Column(nullable = false)
private String lastName;
public Customer() {
super();
id = 0l;
}
public Customer(String firstName, String lastName) {
super();
this.firstName = firstName;
this.lastName = lastName;
}
/*GETTER AND SETTER FOR ALL ATTRIBUTES*/
@Override
public String toString() {
return id + ": " + firstName + " " + lastName;
}
}
I have the following "MyController.java"-Class:
@Controller
class MyController{
//....
@RequestMapping(value = "/new_customer_form.html", method = RequestMethod.GET)
public ModelAndView getNewCustomerForm() {
logger.info("NEW Customer Form");
return new ModelAndView("customer", "customer", new Customer());
}
@RequestMapping(value = "/customer_save/{id}.html", method = RequestMethod.PUT)
public ModelAndView putCustomer(@PathVariable("id") long id, Customer customer,
HttpServletRequest httpRequest) {
logger.info("PUT Customer: " + customer.toString());
return new ModelAndView("success");
}
@RequestMapping(value = "/customer_save/{id}.html", method = RequestMethod.POST)
public ModelAndView postCustomer(@PathVariable("id") long id, Customer customer,
HttpServletRequest httpRequest) {
logger.info("POST Customer: " + customer.toString());
return new ModelAndView("success");
}
}
My customer resources/templates/customer.html file is that:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/web/thymeleaf/layout">
<head>
<title>Customer : Edit</title>
</head>
<body>
<h1 >Customer : Edit</h1>
<div>
<form th:action="'customer_save/'+${customer.id}+'.html'" th:object="${customer}"
th:method="put" role="form">
<div class="form-group">
<label >Lastname</label> <input type="text"
th:field="*{lastName}" class="form-control" placeholder="lastName" />
</div>
<div class="form-group">
<label >Firstname</label> <input type="text"
th:field="*{firstName}" class="form-control"
placeholder="firstName" />
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
</body>
</html>
If I start my application (SpringBoot) and use the http://localhost:8080/abwesenheits_microservice/new_customer_form.html url in chrome browser the user ui-form appears. After typing a name (e.g. Claudia Schiffer) in and click the submit Button the following LOG appears:
PUT Customer: 0: null null
That is my question: Why the form parameters are null in case of a put form request?
The heavy thing is: If I change the request method from put to post (replace the th:method="put" with th:method="post") it works and lead to the following log:
POST Customer: 0: Schiffer Claudia
Thank you for reading my question.
EDIT Thymeleaf & Spring MVC generates a hidden-field with "put" value and changes automatically the method to "post". But there still comes no data..
The resulting html-form in browser is:
<form role="form" method="post" action="customer_save/0.html"><input type="hidden" name="_method" value="put">
<div class="form-group">
<label>Lastname</label> <input type="text" class="form-control" placeholder="lastName" id="lastName" name="lastName" value="">
</div>
<div class="form-group">
<label>Firstname</label> <input type="text" class="form-control" placeholder="firstName" id="firstName" name="firstName" value="">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
th:methodactually does a POST but adds a hidden field to hide the actual method i.e. PUT. For this to work you would need to have configured theHiddenHttpMethodFilterand for supporting PUT requests also aHttpPutFormContentFilter. Make sure theHiddenHttpMethodFiltercomes before theHttpPutFormContentFilterelse it won't work. – M. DeinumHttpPutFormContentFilter. I found that information that it is already in Spring Boot here: github.com/spring-projects/spring-boot/issues/3643 – phil