diff --git a/server/apps/edu/migrations/0009_alter_certificate_用户id.py b/server/apps/edu/migrations/0009_alter_certificate_用户id.py
new file mode 100644
index 0000000..0424bf8
--- /dev/null
+++ b/server/apps/edu/migrations/0009_alter_certificate_用户id.py
@@ -0,0 +1,21 @@
+# Generated by Django 3.2.12 on 2024-06-06 02:26
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('edu', '0008_certificate_用户id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='certificate',
+            name='用户ID',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/server/apps/edu/models.py b/server/apps/edu/models.py
index ac25761..adbf6d2 100644
--- a/server/apps/edu/models.py
+++ b/server/apps/edu/models.py
@@ -26,8 +26,8 @@ class Certificate(CommonADModel):
     是否需要北京标研培训合格 = models.BooleanField(default=False)
     课程列表 = models.ManyToManyField(Course, blank=True)
     培训日期 = models.DateField(null=True, blank=True)
-    培训结束日期 = models.DateField(null=True, blank=True)
+    培训结束日期 = models.DateField(null=True, blank=True)  
     发证日期 = models.DateField(null=True, blank=True)
     证书地址 = models.CharField(max_length=100, null=True, blank=True)
-    用户ID = models.IntegerField(null=True, blank=True, max_length=32)
+    用户ID = models.ForeignKey(null=True, blank=True, to='system.User', on_delete=models.CASCADE)
     examrecord = models.OneToOneField('exam.ExamRecord', on_delete=models.CASCADE, null=True, blank=True, related_name='cert_er')
diff --git a/server/apps/exam/views.py b/server/apps/exam/views.py
index 4e835c3..f425400 100644
--- a/server/apps/exam/views.py
+++ b/server/apps/exam/views.py
@@ -557,7 +557,9 @@ class ExamRecordViewSet(ListModelMixin, DestroyModelMixin, RetrieveModelMixin, G
 
     def get_serializer_class(self):
         if self.action == 'retrieve':
-            return ExamRecordDetailSerializer
+            now = timezone.now()
+            if now > self.get_object().exam.end_time:
+                return ExamRecordDetailSerializer
         return super().get_serializer_class()
 
     def perform_destroy(self, instance):  # 考试记录物理删除
diff --git a/server/apps/information/migrations/0050_alter_qualification_change_date.py b/server/apps/information/migrations/0050_alter_qualification_change_date.py
new file mode 100644
index 0000000..e2122ab
--- /dev/null
+++ b/server/apps/information/migrations/0050_alter_qualification_change_date.py
@@ -0,0 +1,20 @@
+# Generated by Django 3.2.12 on 2024-06-06 02:26
+
+import datetime
+from django.db import migrations, models
+from django.utils.timezone import utc
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('information', '0049_alter_qualification_change_date'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='qualification',
+            name='change_date',
+            field=models.DateField(blank=True, default=datetime.datetime(2024, 6, 6, 2, 26, 43, 23224, tzinfo=utc), null=True, verbose_name='变更日期'),
+        ),
+    ]