diff --git a/models.py b/models.py
index 0a03dc3..8ae2e73 100644
--- a/models.py
+++ b/models.py
@@ -107,7 +107,7 @@ class WhaleContainer(db.Model):
 class WhaleContainerLog(db.Model):
     id = db.Column(db.Integer,primary_key=True, autoincrement=True)
     challenge_id = db.Column(None, db.ForeignKey("challenges.id"))
-    user_id = db.Column(None,  db.ForeignKey("users.id"))
+    user_id = db.Column(db.Integer,  db.ForeignKey("users.id"))
     start_time = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
     uuid = db.Column(db.String(256))
     port = db.Column(db.Integer, nullable=True, default=0)
diff --git a/templates/containers/list.logs.html b/templates/containers/list.logs.html
index e92e513..0dfa185 100644
--- a/templates/containers/list.logs.html
+++ b/templates/containers/list.logs.html
@@ -22,16 +22,20 @@
                 <tr>
                     <td class="border-right" data-checkbox>
                         <div class="form-check text-center">&nbsp;
-                            <input type="checkbox" class="form-check-input" data-user-id="{{ container.user.id }}">
+                            <input type="checkbox" class="form-check-input" data-user-id="{{ container.user.id if container.user else '' }}">
                         </div>
                     </td>
                     <td class="text-center">
                         {{ container.id }}
                     </td>
                     <td class="text-center">
-                        <a href="{{ url_for('admin.users_detail', user_id=container.user.id) }}">
-                            {{ container.user.name | truncate(12) }}
-                        </a>
+                        {% if container.user %}
+                            <a href="{{ url_for('admin.users_detail', user_id=container.user.id) }}">
+                                {{ container.user.name | truncate(12) }}
+                            </a>
+                        {% else %}
+                            <span class="text-muted">无关联用户</span>
+                        {% endif %}
                     </td>
                     <td class="text-center">
                         <a href="{{ url_for('admin.challenges_detail', challenge_id=container.challenge.id) }}">