diff --git a/server/apps/exam/migrations/0003_auto_20221108_0901.py b/server/apps/exam/migrations/0003_auto_20221108_0901.py
new file mode 100644
index 0000000..64aedfc
--- /dev/null
+++ b/server/apps/exam/migrations/0003_auto_20221108_0901.py
@@ -0,0 +1,31 @@
+# Generated by Django 3.0.5 on 2022-11-08 01:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('exam', '0002_auto_20221107_1356'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='examrecord',
+            name='questions',
+        ),
+        migrations.RemoveField(
+            model_name='paperquestion',
+            name='sort',
+        ),
+        migrations.AddField(
+            model_name='answerdetail',
+            name='total_score',
+            field=models.FloatField(default=0, verbose_name='该题满分'),
+        ),
+        migrations.AddField(
+            model_name='examrecord',
+            name='is_submited',
+            field=models.BooleanField(default=False),
+        ),
+    ]
diff --git a/server/apps/exam/views.py b/server/apps/exam/views.py
index c0c4461..da12242 100644
--- a/server/apps/exam/views.py
+++ b/server/apps/exam/views.py
@@ -231,7 +231,10 @@ class PaperViewSet(ModelViewSet):
 
     def update(self, request, *args, **kwargs):
         # 有考试在执行,不可更新
+        now = timezone.now()
         paper = self.get_object()
+        if Exam.objects.filter(close_time__gte=now, paper=paper).exists():
+            raise ParseError('存在考试,不可编辑')
         sr = PaperCreateUpdateSerializer(instance=paper, data=request.data)
         sr.is_valid(raise_exception=True)
         vdata = sr.validated_data