REST @DeleteMapping - Not allowed to create transaction on shared EntityManager

Question

When i use DELETE in postman on adress http://localhost:8081/api/data/removedata/1

i get a message response saying:"Not allowed to create transaction on shared EntityManager - use Spring transactions or EJB CMT instead",

this is the java code

    @DeleteMapping("/removedata/{id}")
    public ResponseEntity deleteData(@PathVariable String id) {
        long remInt = Long.parseLong(id);
        Data dataRem = em.find(Data.class, remInt);
          em.getTransaction().begin();
          em.remove(dataRem);
          em.getTransaction().commit();
        return ResponseEntity.ok(new MessageResponse("Data removed"));
    }

What am i doing wrong? ps im a novice still struggling with the basics.

Answer 1

This issue was resolved by adding @Transactional like so:

    @Transactional
    @DeleteMapping("/removedata/{id}")
    public ResponseEntity deleteData(@PathVariable String id) {
        long remInt = Long.parseLong(id);
        Data dataRem = em.find(Data.class, remInt);
          em.getTransaction().begin();
          em.remove(dataRem);
          em.getTransaction().commit();
        return ResponseEntity.ok(new MessageResponse("Data removed"));
    }