The goal is to send a HTTP GET request containing a list of string representing the enum values QuestionSubject, then use those parameters to select the questions of the right subject. I also added a custom converter to convert the received string to my enum. My problem is that "subjects" is always null when I debug inside the method.
This is my current REST endpoint:
@ResponseBody
@GetMapping(path = "question/getquestionsbysubjects")
public List<Question> loadQuestionsBySubjects(@RequestParam(required=false) QuestionSubject[] subjects) throws IOException, GeneralSecurityException {
if(subjects == null || subjects.length == 0){
return this.loadAllQuestions();
}
return questionRepository.findByQuestionSubjectIn(Arrays.asList(subjects));
}
I am able to get my questions when passing a single subject in a method with the following signature:
public List<Question> loadQuestionsBySubjects(@RequestParam(required=false) QuestionSubject subject)
So it does not appear to be an issue of converting the string to enum.
I tried sending multiple requests, but subjects is always null in the endpoint. Here's what I already tried using postman:
http://localhost:8080/question/getquestionsbysubjects?subjects=contacts,ko
http://localhost:8080/question/getquestionsbysubjects?subjects=["contacts", "ko"]
http://localhost:8080/question/getquestionsbysubjects?subjects=contacts&subjects=ko
Is there an issue I'm not aware of? Those seems to be working in what I found in other questions.
Here's the converter:
public class StringToQuestionSubjectConverter implements Converter<String, QuestionSubject> {
@Override
public QuestionSubject convert(String source) {
return QuestionSubject.valueOf(source.toUpperCase());
}
public Iterable<QuestionSubject> convertAll(String[] sources) {
ArrayList<QuestionSubject> list = new ArrayList<>();
for (String source : sources) {
list.add(this.convert(source));
}
return list;
}
}
