refector: 调整一下结构

test_server/examtest/views.py

@@ -551,38 +551,32 @@ class ExamTestViewSet(PageOrNot, ModelViewSet):
     @transaction.atomic
     def create(self, request, *args, **kwargs):
         serializer = MoniTestSerializer(data = request.data)
-        if serializer.is_valid():
-            instance = serializer.save(consumer = request.user)
-            if 'questions' in request.data:
-                questions = []
-                for i in request.data['questions']:
-                    question = {}
-                    question['question'] = i['id']
-                    question['examtest'] = instance.id
-                    question['score'] = i['score']
-                    if 'user_answer' in i:
-                        question['user_answer'] = i['user_answer']
-                    question['is_right'] = i['is_right']
-                    questions.append(question)
-                serializer_detail = AnswerDetailCreateSerializer(data=questions, many=True)
-                if serializer_detail.is_valid():
-                    serializer_detail.save()
-                    # 关联正式考试如有
-                    if request.data.get('exam', None):
-                        exam = Exam.objects.get(pk=request.data['exam'])
-                        instance.exam =  exam
-                        instance.save()
-                        # 自动发证
-                        if exam.auto_issue and instance.is_pass:
-                            issue(instance)
-                    return Response(MoniTestSerializer(instance).data,status=status.HTTP_200_OK)
-                else:
-                    return Response(serializer_detail.errors)
-
-            else:
-                return Response({'error':'答题记录不存在'})
-        else:
-            return Response(serializer.errors)
+        serializer.is_valid(raise_exception=True)
+        instance = serializer.save(consumer = request.user)
+        if 'questions' in request.data:
+            questions = []
+            for i in request.data['questions']:
+                question = {}
+                question['question'] = i['id']
+                question['examtest'] = instance.id
+                question['score'] = i['score']
+                if 'user_answer' in i:
+                    question['user_answer'] = i['user_answer']
+                question['is_right'] = i['is_right']
+                questions.append(question)
+            serializer_detail = AnswerDetailCreateSerializer(data=questions, many=True)
+            serializer_detail.is_valid(raise_exception=True)
+            serializer_detail.save()
+            # 关联正式考试如有
+            if request.data.get('exam', None):
+                exam = Exam.objects.get(pk=request.data['exam'])
+                instance.exam =  exam
+                instance.save()
+                # 自动发证
+                if exam.auto_issue and instance.is_pass:
+                    issue(instance)
+            return Response(MoniTestSerializer(instance).data,status=status.HTTP_200_OK)
+        raise ParseError('答题记录不存在')
     
     @action(methods=['get'], detail=False,
             url_path='export', url_name='export_test', perms_map=[{'*':'export_test'}])