Spring Boot and Thymeleaf: field 'name' cannot be found on null

Question

I'm unable to display in my template page the fields of an Object I have in the model. I have checked similar issues on StackOverFlow but they all point to a wrong naming (model name != EL expression used). I have double-checked it but still cannot find the cause of the issue. Here is my html:

<!DOCTYPE HTML> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>Spring Boot Thymeleaf Example</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <body> <h2>Hello</h2> <table> <tr th:each="Persons:${persons}"> <th>Name</th> <th>Surname</th> <td th:text="${person.name}" /> <td th:text="${person.surname}" /> </tr> </tbody> </table> </body> </html>

And this is my Controller class:

@Controller @RequestMapping("/persons") public class PersonController { private static List<Person> persons = new ArrayList(); static { Person p = new Person("admin", "admin"); persons.add(p); } @GetMapping public String getAllPersons(Model model) { model.addAttribute("persons",persons); return "persons"; }

Obviously, there is a Person class with fields(and getter/setters):

public class Person { private String name; private String surname; public Person(String name, String surname) { super(); this.name = name; this.surname = surname; } // getters/setters }

When requesting the "/persons" page the following error is displayed:

Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'name' cannot be found on null

Can you suggest me how to fix the issue?

Alien · Accepted Answer · 2018-12-03 08:56:58Z

1

Typo here :

Change th:each="Persons : ${persons} to th:each="person : ${persons}

answered Dec 3, 2018 at 8:56

Alien

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1 Comment

Carla Over a year ago

OMG. Sorry, I thought the first String "Person" was just text to be printed in the page and had no effect on the framework. Sorry it takes time to remove JSF from your background :-)

Patrick · Accepted Answer · 2018-12-03 08:41:45Z

The variable Persons in your th:each is different spelled than in your iteration. Change your code like this:

 <tr th:each="person : ${persons}"> <th>Name</th> <th>Surname</th> <td th:text="${person.name}" /> <td th:text="${person.surname}" /> </tr>

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