How to serialize response in string? [closed]

Question

I need to set a success response in a String. How can I serialize a response in string?

Answer 1

Apex takes care of the serialization if you just return the string from your method.

From the documentation:

If the method returns void, then Apex REST returns the response in the responseBody property. If the method returns a value, then Apex REST serializes the return value as the response.

So change your method signature to

@HttpPost
global static String addCases(){
 try
  {
  RestContext.response.statusCode = 200;
  return 'successfully inserted'+cases.id;
 }
 catch(Exception e)
 {
  return 'Error:case insertion failure';
 }
}

You can send different status codes based on your logic.