修复bug

app.py

@@ -12,6 +12,11 @@ from io import BytesIO
 import zipfile
 from pypinyin import pinyin, Style
 import uuid
+
+app = Flask(__name__)
+app.secret_key = 'your-secret-key-here'
+from pypinyin import pinyin, Style
+
 def to_pinyin(text):
     """将中文转换为拼音"""
     if not text:
@@ -21,14 +26,11 @@ def to_pinyin(text):
     # 拼接成字符串
     return "_".join([item[0] for item in pinyin_list])
 
-app = Flask(__name__)
-app.secret_key = 'your-secret-key-here'
-
+# 注册模板过滤器
 @app.template_filter('to_pinyin')
 def jinja2_to_pinyin(text):
     return to_pinyin(text)
 
-
 # 数据库配置
 db_config = {
     'host': '192.168.31.11',
@@ -631,6 +633,8 @@ def create_ca_view():
     return render_template('create_ca.html')
 
 
+from datetime import timedelta  # 确保顶部已导入
+
 @app.route('/cas/<int:ca_id>')
 @login_required
 def ca_detail(ca_id):
@@ -663,7 +667,14 @@ def ca_detail(ca_id):
             """, (ca_id,))
             crl = cursor.fetchone()
 
-            return render_template('ca_detail.html', ca=ca, certificates=certificates, crl=crl)
+            return render_template(
+                'ca_detail.html',
+                ca=ca,
+                certificates=certificates,
+                crl=crl,
+                timedelta=timedelta,  # 传递timedelta到模板
+                get_username=get_username  # 确保这个函数已定义
+            )
         except Error as e:
             print(f"Database error: {e}")
             flash('获取CA详情失败', 'danger')
@@ -674,6 +685,23 @@ def ca_detail(ca_id):
                 conn.close()
     return redirect(url_for('ca_list'))
 
+def get_username(user_id):
+    """根据用户ID获取用户名"""
+    conn = get_db_connection()
+    if conn:
+        try:
+            cursor = conn.cursor(dictionary=True)
+            cursor.execute("SELECT username FROM users WHERE id = %s", (user_id,))
+            user = cursor.fetchone()
+            return user['username'] if user else str(user_id)
+        except Error as e:
+            print(f"Database error: {e}")
+            return str(user_id)
+        finally:
+            if conn.is_connected():
+                cursor.close()
+                conn.close()
+    return str(user_id)
 
 @app.route('/cas/<int:ca_id>/generate_crl')
 @login_required

templates/ca_detail.html

@@ -75,8 +75,14 @@
                     <dt class="col-sm-4"><i class="fas fa-key"></i> 密钥长度</dt>
                     <dd class="col-sm-8">{{ ca.key_size }}位</dd>
 
-                    <dt class="col-sm-4"><i class="fas fa-calendar-check"></i> 有效期</dt>
-                    <dd class="col-sm-8">{{ ca.days_valid }}天 (至 {{ (ca.created_at + timedelta(days=ca.days_valid)).strftime('%Y-%m-%d') }})</dd>
+<!-- 修改有效期显示部分 -->
+<dt class="col-sm-4"><i class="fas fa-calendar-check"></i> 有效期</dt>
+<dd class="col-sm-8">
+    {{ ca.days_valid }}天
+    {% if ca.created_at %}
+        (至 {{ (ca.created_at + timedelta(days=ca.days_valid)).strftime('%Y-%m-%d') }})
+    {% endif %}
+</dd>
 
                     <dt class="col-sm-4"><i class="fas fa-user"></i> 创建者</dt>
                     <dd class="col-sm-8">{{ get_username(ca.created_by) }}</dd>