OC-2959 freeform and MCQ submitted values are a json and not an array

problem_builder/answer.py

@@ -223,7 +223,7 @@ class AnswerBlock(SubmittingXBlockMixin, AnswerMixin, QuestionMixin, StudioEdita
         The parent block is handling a student submission, including a new answer for this
         block. Update accordingly.
         """
-        self.student_input = submission[0]['value'].strip()
+        self.student_input = submission['value'].strip()
         self.save()
 
         if sub_api:

problem_builder/mcq.py

@@ -125,8 +125,8 @@ class MCQBlock(SubmittingXBlockMixin, StudentViewUserStateMixin, QuestionnaireAb
 
     def submit(self, submission):
         log.debug(u'Received MCQ submission: "%s"', submission)
-        result = self.calculate_results(submission)
-        self.student_choice = submission
+        result = self.calculate_results(submission['value'])
+        self.student_choice = submission['value']
         log.debug(u'MCQ submission result: %s', result)
         return result
 

problem_builder/public/js/answer.js

@@ -15,7 +15,13 @@ function AnswerBlock(runtime, element) {
         },
 
         submit: function() {
-            return $(':input', element).serializeArray();
+            var freeform_answer = $(':input', element);
+
+            if(freeform_answer.length) {
+                return {"value": freeform_answer.val()};
+            } else {
+                return null;
+            }
         },
 
         handleReview: function(result) {

problem_builder/public/js/questionnaire.js

@@ -107,7 +107,7 @@ function MCQBlock(runtime, element) {
             var checkedRadio = $('input[type=radio]:checked', element);
 
             if(checkedRadio.length) {
-                return checkedRadio.val();
+                return {"value": checkedRadio.val()};
             } else {
                 return null;
             }