Kris
03d9dd0543
1. 为消息反馈表新增channel字段并完善相关接口返回 2. 创建渠道插件状态存储表与对应索引 3. 调整路由规则agent_config_id字段类型为字符串 4. 添加日志敏感信息脱敏功能 5. 优化消息记录仓库方法，新增响应时间统计和查询接口
458 lines
23 KiB
Python
458 lines
23 KiB
Python
"""PostgreSQL 数据库管理器 - 支持知识库和业务数据"""
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import json
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import os
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from contextlib import asynccontextmanager
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from psycopg_pool import AsyncConnectionPool
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from sqlalchemy import text
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from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
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from sqlalchemy.orm import declarative_base
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from yuxi.storage.postgres.models_business import Base as BusinessBase
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from yuxi.storage.postgres.models_channels import Base as ChannelsBase
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from yuxi.storage.postgres.models_knowledge import Base as KnowledgeBase
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from yuxi.utils import logger
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from server.utils.singleton import SingletonMeta
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# 合并所有 Base
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CombinedBase = declarative_base()
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# 继承所有表
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for module in [KnowledgeBase, BusinessBase, ChannelsBase]:
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for table_name in dir(module):
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table = getattr(module, table_name)
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if isinstance(table, type) and hasattr(table, "__tablename__"):
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setattr(CombinedBase, table_name, table)
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class PostgresManager(metaclass=SingletonMeta):
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"""PostgreSQL 数据库管理器 - 支持知识库和业务数据"""
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# 知识库 PostgreSQL URL 环境变量名
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KB_DATABASE_URL_ENV = "POSTGRES_URL"
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def __init__(self):
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self.async_engine = None
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self.AsyncSession = None
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self.langgraph_pool = None
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self._initialized = False
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def initialize(self):
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"""初始化数据库连接"""
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if self._initialized:
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return
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db_url = os.getenv(self.KB_DATABASE_URL_ENV)
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if not db_url:
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logger.error(
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f"环境变量 {self.KB_DATABASE_URL_ENV} 未设置，"
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"请在 docker-compose.yml 或 .env 中配置 PostgreSQL 连接字符串"
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)
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return
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try:
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# 创建异步 SQLAlchemy 引擎
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self.async_engine = create_async_engine(
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db_url,
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json_serializer=lambda obj: json.dumps(obj, ensure_ascii=False),
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json_deserializer=json.loads,
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pool_pre_ping=True,
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pool_recycle=1800,
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)
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# 创建异步会话工厂
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self.AsyncSession = async_sessionmaker(
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bind=self.async_engine,
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class_=AsyncSession,
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expire_on_commit=False,
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)
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# ==========================================
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# 2. 为 LangGraph 专门初始化一个原生 psycopg_pool
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# ==========================================
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# ⚠️ 注意：psycopg 不认识 "+asyncpg" 这样的 SQLAlchemy 方言标识。
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# 如果你的 db_url 是 "postgresql+asyncpg://user:pwd@host/db"，
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# 需要把它清洗成标准的 "postgresql://user:pwd@host/db"
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langgraph_db_url = db_url.replace("+asyncpg", "").replace("+psycopg", "")
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# 创建 LangGraph 专属连接池
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self.langgraph_pool = AsyncConnectionPool(
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conninfo=langgraph_db_url,
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max_size=10, # 根据你的 Agent 并发情况设置，通常 5-10 足够了
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kwargs={"autocommit": True}, # LangGraph Checkpoint 强依赖 autocommit
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)
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self._initialized = True
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logger.info(f"PostgreSQL manager initialized for knowledge base: {db_url.split('@')[0]}://***")
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except Exception as e:
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logger.error(f"Failed to initialize PostgreSQL manager: {e}")
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# 不抛出异常，允许应用启动，但在使用时会报错
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def _check_initialized(self):
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"""检查是否已初始化"""
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if not self._initialized:
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raise RuntimeError("PostgreSQL manager not initialized. Please check configuration.")
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async def create_tables(self):
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"""创建所有表（知识库和业务表）"""
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self._check_initialized()
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async with self.async_engine.begin() as conn:
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await conn.run_sync(KnowledgeBase.metadata.create_all)
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await conn.run_sync(BusinessBase.metadata.create_all)
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logger.info("PostgreSQL tables created/checked (knowledge + business)")
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async def create_business_tables(self):
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"""创建所有业务数据表"""
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self._check_initialized()
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async with self.async_engine.begin() as conn:
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await conn.run_sync(BusinessBase.metadata.create_all)
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logger.info("PostgreSQL business tables created/checked")
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async def drop_tables(self):
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"""删除所有表（慎用！）"""
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self._check_initialized()
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async with self.async_engine.begin() as conn:
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await conn.run_sync(BusinessBase.metadata.drop_all)
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await conn.run_sync(KnowledgeBase.metadata.drop_all)
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logger.info("PostgreSQL tables dropped")
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async def ensure_knowledge_schema(self):
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"""确保知识库 schema 包含所有必要字段"""
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self._check_initialized()
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stmts = [
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS embed_info JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS llm_info JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS query_params JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS additional_params JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS share_config JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS mindmap JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS sample_questions JSONB",
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"ALTER TABLE IF EXISTS knowledge_bases ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS parent_id VARCHAR(64)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS original_filename VARCHAR(512)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS file_type VARCHAR(64)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS path VARCHAR(1024)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS minio_url VARCHAR(1024)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS markdown_file VARCHAR(1024)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS status VARCHAR(32)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS content_hash VARCHAR(128)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS file_size BIGINT",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS content_type VARCHAR(64)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS processing_params JSONB",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS is_folder BOOLEAN",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS error_message TEXT",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS created_by VARCHAR(64)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS updated_by VARCHAR(64)",
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"ALTER TABLE IF EXISTS knowledge_files ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ",
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"ALTER TABLE IF EXISTS evaluation_benchmarks ADD COLUMN IF NOT EXISTS data_file_path VARCHAR(1024)",
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"ALTER TABLE IF EXISTS evaluation_benchmarks ADD COLUMN IF NOT EXISTS created_by VARCHAR(64)",
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"ALTER TABLE IF EXISTS evaluation_benchmarks ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS metrics JSONB",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS overall_score DOUBLE PRECISION",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS total_questions INTEGER",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS completed_questions INTEGER",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS started_at TIMESTAMPTZ",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS completed_at TIMESTAMPTZ",
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"ALTER TABLE IF EXISTS evaluation_results ADD COLUMN IF NOT EXISTS created_by VARCHAR(64)",
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"ALTER TABLE IF EXISTS evaluation_result_details ADD COLUMN IF NOT EXISTS gold_chunk_ids JSONB",
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"ALTER TABLE IF EXISTS evaluation_result_details ADD COLUMN IF NOT EXISTS gold_answer TEXT",
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"ALTER TABLE IF EXISTS evaluation_result_details ADD COLUMN IF NOT EXISTS generated_answer TEXT",
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"ALTER TABLE IF EXISTS evaluation_result_details ADD COLUMN IF NOT EXISTS retrieved_chunks JSONB",
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"ALTER TABLE IF EXISTS evaluation_result_details ADD COLUMN IF NOT EXISTS metrics JSONB",
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# 扩展 db_id 字段长度以支持最长 75 字符的 ID（kb_private_ + 64字符hash）
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"ALTER TABLE IF EXISTS knowledge_bases ALTER COLUMN db_id TYPE VARCHAR(80)",
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"ALTER TABLE IF EXISTS knowledge_files ALTER COLUMN db_id TYPE VARCHAR(80)",
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"ALTER TABLE IF EXISTS evaluation_benchmarks ALTER COLUMN db_id TYPE VARCHAR(80)",
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"ALTER TABLE IF EXISTS evaluation_results ALTER COLUMN db_id TYPE VARCHAR(80)",
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"CREATE INDEX IF NOT EXISTS idx_kb_type ON knowledge_bases(kb_type)",
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"CREATE INDEX IF NOT EXISTS idx_kb_name ON knowledge_bases(name)",
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"CREATE INDEX IF NOT EXISTS idx_kf_db_id ON knowledge_files(db_id)",
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"CREATE INDEX IF NOT EXISTS idx_kf_parent ON knowledge_files(parent_id)",
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"CREATE INDEX IF NOT EXISTS idx_kf_status ON knowledge_files(status)",
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"CREATE INDEX IF NOT EXISTS idx_kf_hash ON knowledge_files(content_hash)",
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"CREATE INDEX IF NOT EXISTS idx_eb_db_id ON evaluation_benchmarks(db_id)",
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"CREATE INDEX IF NOT EXISTS idx_er_db_id ON evaluation_results(db_id)",
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"CREATE INDEX IF NOT EXISTS idx_er_status ON evaluation_results(status)",
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"CREATE INDEX IF NOT EXISTS idx_er_started ON evaluation_results(started_at DESC)",
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"CREATE INDEX IF NOT EXISTS idx_erd_task ON evaluation_result_details(task_id)",
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]
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async with self.async_engine.begin() as conn:
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for stmt in stmts:
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await conn.execute(text(stmt))
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async def ensure_business_schema(self):
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"""确保业务 schema 包含后续新增字段（兼容已存在表）。"""
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self._check_initialized()
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stmts = [
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"ALTER TABLE IF EXISTS users ADD COLUMN IF NOT EXISTS source VARCHAR(32) NOT NULL DEFAULT 'local'",
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"ALTER TABLE IF EXISTS users ALTER COLUMN source SET DEFAULT 'local'",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS tool_dependencies JSONB DEFAULT '[]'::jsonb",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS mcp_dependencies JSONB DEFAULT '[]'::jsonb",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS skill_dependencies JSONB DEFAULT '[]'::jsonb",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS version VARCHAR(64)",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS is_builtin BOOLEAN NOT NULL DEFAULT FALSE",
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"ALTER TABLE IF EXISTS skills ADD COLUMN IF NOT EXISTS content_hash VARCHAR(128)",
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"ALTER TABLE IF EXISTS subagents ADD COLUMN IF NOT EXISTS enabled BOOLEAN NOT NULL DEFAULT TRUE",
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"ALTER TABLE IF EXISTS conversations ADD COLUMN IF NOT EXISTS is_pinned BOOLEAN NOT NULL DEFAULT FALSE",
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"ALTER TABLE IF EXISTS mcp_servers ADD COLUMN IF NOT EXISTS env JSONB",
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"""
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CREATE TABLE IF NOT EXISTS model_providers (
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id SERIAL PRIMARY KEY,
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provider_id VARCHAR(100) NOT NULL UNIQUE,
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display_name VARCHAR(100) NOT NULL,
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provider_type VARCHAR(32) NOT NULL DEFAULT 'openai',
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default_protocol VARCHAR(64),
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base_url VARCHAR(500) NOT NULL,
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embedding_base_url VARCHAR(500),
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rerank_base_url VARCHAR(500),
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models_endpoint VARCHAR(200),
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embedding_models_endpoint VARCHAR(200),
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rerank_models_endpoint VARCHAR(200),
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api_key_env VARCHAR(128),
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api_key VARCHAR(500),
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capabilities JSONB NOT NULL DEFAULT '[]'::jsonb,
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enabled_models JSONB NOT NULL DEFAULT '[]'::jsonb,
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headers_json JSONB,
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extra_json JSONB,
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is_enabled BOOLEAN NOT NULL DEFAULT TRUE,
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is_builtin BOOLEAN NOT NULL DEFAULT FALSE,
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created_by VARCHAR(100),
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updated_by VARCHAR(100),
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created_at TIMESTAMPTZ DEFAULT NOW(),
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updated_at TIMESTAMPTZ DEFAULT NOW()
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)
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""",
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"""
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CREATE TABLE IF NOT EXISTS agent_runs (
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id VARCHAR(64) PRIMARY KEY,
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thread_id VARCHAR(64) NOT NULL,
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agent_id VARCHAR(64) NOT NULL,
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user_id VARCHAR(64) NOT NULL,
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status VARCHAR(32) NOT NULL DEFAULT 'pending',
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request_id VARCHAR(64) NOT NULL UNIQUE,
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input_payload JSONB NOT NULL DEFAULT '{}'::jsonb,
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error_type VARCHAR(64),
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error_message TEXT,
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started_at TIMESTAMPTZ,
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finished_at TIMESTAMPTZ,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
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)
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""",
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"CREATE INDEX IF NOT EXISTS idx_agent_runs_user_created ON agent_runs(user_id, created_at DESC)",
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"CREATE INDEX IF NOT EXISTS idx_agent_runs_thread_created ON agent_runs(thread_id, created_at DESC)",
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"CREATE INDEX IF NOT EXISTS idx_agent_runs_status_updated ON agent_runs(status, updated_at)",
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"CREATE INDEX IF NOT EXISTS ix_conversations_is_pinned ON conversations(is_pinned)",
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"CREATE UNIQUE INDEX IF NOT EXISTS ix_model_providers_provider_id ON model_providers(provider_id)",
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"CREATE INDEX IF NOT EXISTS ix_model_providers_is_enabled ON model_providers(is_enabled)",
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# 多渠道网关表
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"""
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CREATE TABLE IF NOT EXISTS channels_user_mappings (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_user_id VARCHAR(128) NOT NULL,
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internal_user_id VARCHAR(64) NOT NULL,
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created_at TIMESTAMP NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
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CONSTRAINT uq_channel_user UNIQUE (channel_id, channel_user_id)
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)
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""",
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"""
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CREATE TABLE IF NOT EXISTS channels_thread_mappings (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_chat_id VARCHAR(128) NOT NULL,
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internal_user_id VARCHAR(64) NOT NULL,
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thread_id VARCHAR(64) NOT NULL,
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agent_id VARCHAR(64),
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last_active_at TIMESTAMP NOT NULL DEFAULT NOW(),
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created_at TIMESTAMP NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
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CONSTRAINT uq_channel_thread UNIQUE (channel_id, channel_chat_id, internal_user_id)
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)
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""",
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"""
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CREATE TABLE IF NOT EXISTS channels_msg_records (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_type VARCHAR(32) NOT NULL,
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message_id VARCHAR(128) NOT NULL,
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chat_id VARCHAR(128) NOT NULL,
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chat_type VARCHAR(32) NOT NULL DEFAULT 'direct',
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content_type VARCHAR(32) NOT NULL DEFAULT 'text',
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sender_user_id VARCHAR(128) NOT NULL,
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content_preview VARCHAR(500) NOT NULL,
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reply_to_message_id VARCHAR(128),
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agent_config_id INTEGER,
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status VARCHAR(32) NOT NULL DEFAULT 'processing',
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error_message VARCHAR(500),
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response_time_ms INTEGER,
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reply_message_id VARCHAR(128),
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reply_content_preview VARCHAR(500),
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created_at TIMESTAMP NOT NULL DEFAULT NOW(),
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replied_at TIMESTAMP,
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metadata JSONB
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)
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""",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_channel_status ON channels_msg_records(channel_id, status)",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_created_at ON channels_msg_records(created_at)",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_chat ON channels_msg_records(channel_id, chat_id)",
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]
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async with self.async_engine.begin() as conn:
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for stmt in stmts:
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await conn.execute(text(stmt))
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async def ensure_channels_schema(self):
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"""确保渠道网关相关表存在。"""
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self._check_initialized()
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stmts = [
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"""
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CREATE TABLE IF NOT EXISTS channels_user_mappings (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_user_id VARCHAR(128) NOT NULL,
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internal_user_id VARCHAR(64) NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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CONSTRAINT uq_channel_user UNIQUE (channel_id, channel_user_id)
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)
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""",
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"CREATE INDEX IF NOT EXISTS idx_user_mappings_internal_user ON channels_user_mappings(internal_user_id)",
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"""
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CREATE TABLE IF NOT EXISTS channels_thread_mappings (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_chat_id VARCHAR(128) NOT NULL,
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internal_user_id VARCHAR(64) NOT NULL,
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thread_id VARCHAR(64) NOT NULL,
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agent_id VARCHAR(64),
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last_active_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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CONSTRAINT uq_channel_thread UNIQUE (channel_id, channel_chat_id, internal_user_id)
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)
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""",
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"CREATE INDEX IF NOT EXISTS idx_thread_mappings_thread_id ON channels_thread_mappings(thread_id)",
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"CREATE INDEX IF NOT EXISTS idx_thread_mappings_last_active ON channels_thread_mappings(last_active_at)",
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"""
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CREATE TABLE IF NOT EXISTS channels_msg_records (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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channel_type VARCHAR(32) NOT NULL,
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message_id VARCHAR(128) NOT NULL,
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chat_id VARCHAR(128) NOT NULL,
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chat_type VARCHAR(32) NOT NULL DEFAULT 'direct',
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content_type VARCHAR(32) NOT NULL DEFAULT 'text',
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sender_user_id VARCHAR(128) NOT NULL,
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content_preview VARCHAR(500) NOT NULL,
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reply_to_message_id VARCHAR(128),
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agent_config_id INTEGER,
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status VARCHAR(32) NOT NULL DEFAULT 'processing',
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error_message VARCHAR(500),
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response_time_ms INTEGER,
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reply_message_id VARCHAR(128),
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reply_content_preview VARCHAR(500),
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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replied_at TIMESTAMPTZ,
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metadata JSONB
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)
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""",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_channel_status ON channels_msg_records(channel_id, status)",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_created_at ON channels_msg_records(created_at)",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_stuck"
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" ON channels_msg_records(channel_id, created_at) WHERE status = 'processing'",
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"CREATE INDEX IF NOT EXISTS idx_msg_records_chat ON channels_msg_records(channel_id, chat_id)",
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"""
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CREATE TABLE IF NOT EXISTS channel_plugin_states (
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id BIGSERIAL PRIMARY KEY,
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channel_id VARCHAR(32) NOT NULL,
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namespace VARCHAR(64) NOT NULL DEFAULT 'default',
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entry_key VARCHAR(128) NOT NULL,
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value_json JSONB NOT NULL DEFAULT '{}',
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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expires_at TIMESTAMPTZ,
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CONSTRAINT uq_channel_state UNIQUE (channel_id, namespace, entry_key)
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)
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""",
|
||
"CREATE INDEX IF NOT EXISTS idx_plugin_states_expiry"
|
||
" ON channel_plugin_states(expires_at) WHERE expires_at IS NOT NULL",
|
||
"CREATE INDEX IF NOT EXISTS idx_plugin_states_channel ON channel_plugin_states(channel_id, namespace)",
|
||
"ALTER TABLE IF EXISTS channels_routing_rules"
|
||
" ALTER COLUMN agent_config_id TYPE VARCHAR(64) USING agent_config_id::VARCHAR",
|
||
]
|
||
async with self.async_engine.begin() as conn:
|
||
for stmt in stmts:
|
||
await conn.execute(text(stmt))
|
||
|
||
@property
|
||
def is_postgresql(self) -> bool:
|
||
"""检查是否是 PostgreSQL 数据库"""
|
||
if not self._initialized:
|
||
return False
|
||
return self.async_engine.dialect.name == "postgresql"
|
||
|
||
async def get_async_session(self) -> AsyncSession:
|
||
"""获取异步数据库会话"""
|
||
self._check_initialized()
|
||
return self.AsyncSession()
|
||
|
||
@asynccontextmanager
|
||
async def get_async_session_context(self):
|
||
"""获取异步数据库会话的上下文管理器"""
|
||
self._check_initialized()
|
||
session = self.AsyncSession()
|
||
try:
|
||
yield session
|
||
await session.commit()
|
||
except Exception as e:
|
||
await session.rollback()
|
||
logger.error(f"PostgreSQL async operation failed: {e}")
|
||
raise
|
||
finally:
|
||
await session.close()
|
||
|
||
async def close(self):
|
||
"""关闭引擎"""
|
||
if self.async_engine:
|
||
await self.async_engine.dispose()
|
||
|
||
if self.langgraph_pool:
|
||
await self.langgraph_pool.close()
|
||
|
||
async def async_check_first_run(self):
|
||
"""检查是否首次运行（异步版本）- 检查用户表是否有数据"""
|
||
from sqlalchemy import func, select
|
||
|
||
self._check_initialized()
|
||
async with self.get_async_session_context() as session:
|
||
from yuxi.storage.postgres.models_business import User
|
||
|
||
result = await session.execute(select(func.count(User.id)))
|
||
count = result.scalar()
|
||
return count == 0
|
||
|
||
async def execute(self, statement):
|
||
"""直接执行 SQL 语句（用于迁移脚本）"""
|
||
self._check_initialized()
|
||
async with self.get_async_session_context() as session:
|
||
return await session.execute(statement)
|
||
|
||
async def add(self, instance):
|
||
"""添加实例到会话（用于迁移脚本）"""
|
||
self._check_initialized()
|
||
async with self.get_async_session_context() as session:
|
||
session.add(instance)
|
||
|
||
async def commit(self):
|
||
"""提交当前会话"""
|
||
self._check_initialized()
|
||
async with self.get_async_session_context():
|
||
pass # commit is automatic in context manager
|
||
|
||
|
||
# 创建全局 PostgreSQL 管理器实例
|
||
pg_manager = PostgresManager()
|