perf: Refactor OperateLogStore separator logic for database compatibility

apps/audits/backends/db.py

@@ -1,4 +1,5 @@
 # ~*~ coding: utf-8 ~*~
+from django.conf import settings
 from django.utils.translation import gettext_lazy as _
 
 from audits.models import OperateLog
@@ -6,8 +7,22 @@ from perms.const import ActionChoices
 
 
 class OperateLogStore(object):
-    # 用不可见字符分割前后数据，节省存储-> diff: {'key': 'before\0after'}
+
-    SEP = '\0'
+    @staticmethod
+    def get_separator():
+        """
+        用不可见字符分割前后数据
+        根据数据库引擎类型返回适当的分隔符。
+        PostgreSQL 数据库使用 Unicode 单元分隔符 '\u001f'，
+        其他数据库使用空字符 '\0' 作为分隔符。
+        """
+        db_engine = settings.DB_ENGINE
+        if db_engine == 'postgresql':
+            return '\u001f'
+        else:
+            return '\0'
+
+    SEP = get_separator()
 
     def __init__(self, config):
         self.model = OperateLog

apps/jumpserver/settings/base.py

@@ -243,9 +243,10 @@ MESSAGE_STORAGE = 'django.contrib.messages.storage.cookie.CookieStorage'
 # https://docs.djangoproject.com/en/1.10/ref/settings/#databases
 
 DB_OPTIONS = {}
+DB_ENGINE = CONFIG.DB_ENGINE.lower()
 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.{}'.format(CONFIG.DB_ENGINE.lower()),
+        'ENGINE': 'django.db.backends.{}'.format(DB_ENGINE),
         'NAME': CONFIG.DB_NAME,
         'HOST': CONFIG.DB_HOST,
         'PORT': CONFIG.DB_PORT,
@@ -257,7 +258,7 @@ DATABASES = {
 }
 
 DB_USE_SSL = CONFIG.DB_USE_SSL
-if CONFIG.DB_ENGINE.lower() == 'mysql':
+if DB_ENGINE == 'mysql':
     DB_OPTIONS['init_command'] = "SET sql_mode='STRICT_TRANS_TABLES'"
     if DB_USE_SSL:
         DB_CA_PATH = exist_or_default(os.path.join(CERTS_DIR, 'db_ca.pem'), None)