fix bug and refine ,end of 2025

api/postgresql_info.py

@@ -0,0 +1,36 @@
+from dotenv import load_dotenv
+import os
+
+load_dotenv()
+
+pg_name = os.getenv("DB_NAME")
+pg_host = os.getenv("DB_HOST")
+pg_port = os.getenv("DB_PORT")
+pg_user = os.getenv("DB_USER")
+pg_password = os.getenv("DB_PASSWORD")
+
+
+def get_pgconn_string(
+    db_name=pg_name,
+    db_host=pg_host,
+    db_port=pg_port,
+    db_user=pg_user,
+    db_password=pg_password,
+):
+    """返回 PostgreSQL 连接字符串"""
+    return f"dbname={db_name} host={db_host} port={db_port} user={db_user} password={db_password}"
+
+
+def get_pg_config():
+    """返回 PostgreSQL 配置变量的字典"""
+    return {
+        "name": pg_name,
+        "host": pg_host,
+        "port": pg_port,
+        "user": pg_user,
+    }
+
+
+def get_pg_password():
+    """返回密码（谨慎使用）"""
+    return pg_password