调整代码，支持项目切换，打开不同数据库的连接

app/infra/db/timescaledb/database.py

@@ -17,7 +17,8 @@ class Database:
     def init_pool(self, db_name=None):
         """Initialize the connection pool."""
         # Use provided db_name, or the one from constructor, or default from config
-        conn_string = timescaledb_info.get_pgconn_string()
+        target_db_name = db_name or self.db_name
+        conn_string = timescaledb_info.get_pgconn_string(db_name=target_db_name)
         try:
             self.pool = psycopg_pool.AsyncConnectionPool(
                 conninfo=conn_string,
@@ -27,7 +28,7 @@ class Database:
                 kwargs={"row_factory": dict_row},  # Return rows as dictionaries
             )
             logger.info(
-                f"TimescaleDB connection pool initialized for database: default"
+                f"TimescaleDB connection pool initialized for database: {target_db_name or 'default'}"
             )
         except Exception as e:
             logger.error(f"Failed to initialize TimescaleDB connection pool: {e}")

app/infra/db/timescaledb/router.py

@@ -2,6 +2,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query
 from typing import List, Optional
 from datetime import datetime
 from psycopg import AsyncConnection
+from pydantic import BaseModel
 
 from .database import get_database_instance
 from .schemas.realtime import RealtimeRepository
@@ -15,6 +16,10 @@ from app.infra.db.postgresql.database import (
 router = APIRouter()
 
 
+class DatabaseConfig(BaseModel):
+    db_name: str
+
+
 # 创建支持数据库选择的连接依赖函数
 async def get_database_connection(
     db_name: Optional[str] = Query(
@@ -39,6 +44,26 @@ async def get_postgres_connection(
         yield conn
 
 
+@router.post("/timescaledb/open-database")
+async def open_database(config: DatabaseConfig):
+    """
+    尝试连接指定数据库，如果成功则返回成功消息
+    """
+    try:
+        instance = await get_database_instance(config.db_name)
+        # 尝试获取连接并执行简单查询以验证连接
+        async with instance.get_connection() as conn:
+            async with conn.cursor() as cur:
+                await cur.execute("SELECT 1")
+                await cur.fetchone()
+        
+        return {"success": True, "message": f"Successfully connected to database: {config.db_name}"}
+    except Exception as e:
+        raise HTTPException(
+            status_code=500, detail=f"Failed to connect to database {config.db_name}: {str(e)}"
+        )
+
+
 # --- Realtime Endpoints ---