How to define drools rule for list of string as POST method in POSTMAN

Question

public class QuestionnaireReq {

    private String questionId;
    private List<String> answerText;

    public String getQuestionId() {
        return questionId;
    }
    public void setQuestionId(String questionId) {
        this.questionId = questionId;
    }

    public List<String> getAnswerText() {
        return answerText;
    }
    public void setAnswerText(List<String> answerText) {
        this.answerText = answerText;
    }

}

and drools file

rule "qustionRule_3"

when
questionnaireReq : QuestionnaireReq(questionId=="q2" && $answerText=="Web UI front-end");
questionnaireRes : QuestionnaireRes();
then
questionnaireRes.setNextQuestionId("q3");
end

and postman request here

{
    "questionId":"q3",
    "answerText":["Web UI front-end","Web Back-end"]

}

Answer 1

I think what you're trying to ask is how to update your rule to check that a value is in a list, since your original rule is trying to do an == which will never match since you're comparing a list to a string.

In this case you'll want to use the Drools contains operator, which verifies that a list contains a given element.

rule "qustionRule_3"
when
  questionnaireReq : QuestionnaireReq( questionId=="q2",
                                       answerText contains "Web UI front-end")
  questionnaireRes : QuestionnaireRes()
then
  questionnaireRes.setNextQuestionId("q3");
end

You can read more about the contains operator in the official Drools documentation, in the section called "Supported operators in DRL pattern constraints" .