Fixes invalid type of questions

src/db/quiz/QuizDAO.ts

@@ -276,8 +276,10 @@ class QuizDAO extends AbstractDAO<Array<IQuizEntity>> {
       }
     });
 
-    obj.TYPE = obj.type;
-    delete obj.type;
+    if (obj.hasOwnProperty('type')) {
+      obj.TYPE = obj.type;
+      delete obj.type;
+    }
 
     return obj;
   }

src/entities/answer/AnswerValidator.ts

@@ -10,6 +10,6 @@ export const getAnswerForType = (type: AnswerType, data?: object): AbstractAnswe
     case AnswerType.FreeTextAnswerOption:
       return new FreeTextAnswerEntity(data);
     default:
-      throw new Error(`Cannot built question with type: ${type}`);
+      throw new Error(`Cannot build answer with type: ${type}`);
   }
 };

src/entities/question/QuizValidator.ts

@@ -28,6 +28,6 @@ export const getQuestionForType = (type: QuestionType | string, data = {}): Abst
     case QuestionType.SurveyQuestion:
       return new SurveyQuestionEntity(data);
     default:
-      throw new Error(`Cannot built question with type: ${type}`);
+      throw new Error(`Cannot build question with type: ${type}`);
   }
 };