I'm using postman with springboot i have already used the GET/POST/DELETE requests and they all work fine but PUT request doesn't update content .

In intellij i'm using these files :

Student.java(with it's setters and getters) :

@Entity
@Table
public class Student {
@Id
@SequenceGenerator(
        name="student_sequence",
        sequenceName="student_sequence",
        allocationSize = 1
)
@GeneratedValue(
        strategy = GenerationType.SEQUENCE,
        generator = "student_sequence"
)
private Long id;
private String name;

private LocalDate dob;
private  String email;
@Transient
private Integer age;

StudentController.java :

@PutMapping(path ="{studentId}")
public void updateStudent(
        @PathVariable("studentId") Long studentId,
        @RequestParam(required = false) String name,
        @RequestParam(required = false) String email)
{
    studentService.updateStudent(studentId,name,email);
}

StudentService.java :

@Transactional
public void updateStudent(Long studentId,String name, String email)
{
   Student student = studentRepository.findById(studentId)
           .orElseThrow(() -> new IllegalStateException(
                   "student with id=" studentId "does not exist"));
   if (name !=null && name.length()>0  && !Objects.equals(student.getName(),name))
   {
       student.setName(name);
   }
   if (email !=null && email.length()>0 && !Objects.equals(student.getEmail(),email))
   {
       Optional<Student> studentOptional= studentRepository.findStudentByEmail(email);
       if (studentOptional.isPresent())
       {
           throw new IllegalStateException("email taken");
       }
       student.setEmail(email);
   }
 }

These are the students that i have in database And basically i want to update the name and email of the student with id=1.

That is postman header

And that is postman not showing any error after sending request

CodePudding user response：

using @RequestParam(required = false) String name the params are expected as header or query param. You're sending a request body, so use a pojo instead...

class StudentDto {

  public String name;
  //...

}

and the controller ...

@PutMapping(path ="{studentId}")
public void updateStudent(
        @PathVariable("studentId") Long studentId,
        @RequestBody StudentDto) {
  //...

}

CodePudding user response：

To leave it be and make it work, you have to put your data as query params, lik ethis

PUT http://localhost:8080/api/v1/student/1?name=newName&email=newEmailToSet