80 строки
3.2 KiB
Python
80 строки
3.2 KiB
Python
from collections.abc import Generator
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from sqlalchemy import create_engine, inspect, text
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from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
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from app.core import get_settings
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settings = get_settings()
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engine = create_engine(settings.database_url, pool_pre_ping=True)
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SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
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class Base(DeclarativeBase):
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pass
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def get_db() -> Generator[Session, None, None]:
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def init_db() -> None:
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from app import models # noqa: F401
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Base.metadata.create_all(bind=engine)
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apply_safe_schema_patches()
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def apply_safe_schema_patches() -> None:
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inspector = inspect(engine)
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table_names = inspector.get_table_names()
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if 'bot_state' in table_names:
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_add_missing_columns('bot_state', {
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'live_acknowledged': "BOOLEAN NOT NULL DEFAULT FALSE",
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'emergency_stop': "BOOLEAN NOT NULL DEFAULT FALSE",
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'trade_mode': "VARCHAR(16) NOT NULL DEFAULT 'demo'",
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'enabled': "BOOLEAN NOT NULL DEFAULT FALSE",
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'trade_style_mode': "VARCHAR(32) NOT NULL DEFAULT 'balanced'",
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'min_signal_score': "FLOAT NOT NULL DEFAULT 65.0",
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'max_open_positions': "INTEGER NOT NULL DEFAULT 3",
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'max_quote_per_trade': "FLOAT NOT NULL DEFAULT 100.0",
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'last_market': "VARCHAR(32) NOT NULL DEFAULT ''",
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})
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if 'demo_positions' in table_names:
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_add_missing_columns('demo_positions', {
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'side': "VARCHAR(8) NOT NULL DEFAULT 'long'",
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'current_price': "FLOAT NOT NULL DEFAULT 0.0",
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'take_profit': "FLOAT NOT NULL DEFAULT 0.0",
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'stop_loss': "FLOAT NOT NULL DEFAULT 0.0",
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'unrealized_pnl': "FLOAT NOT NULL DEFAULT 0.0",
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'unrealized_pnl_pct': "FLOAT NOT NULL DEFAULT 0.0",
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'opened_at': "TIMESTAMP WITH TIME ZONE DEFAULT NOW() NOT NULL",
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'closed_at': "TIMESTAMP WITH TIME ZONE NULL",
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})
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if 'market_rules' in table_names:
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_add_missing_columns('market_rules', {
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'base_asset': "VARCHAR(16) NOT NULL DEFAULT ''",
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'quote_asset': "VARCHAR(16) NOT NULL DEFAULT 'USDT'",
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'min_amount': "FLOAT NOT NULL DEFAULT 0.0",
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'min_quote_amount': "FLOAT NOT NULL DEFAULT 0.0",
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'amount_precision': "INTEGER NOT NULL DEFAULT 8",
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'price_precision': "INTEGER NOT NULL DEFAULT 8",
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'maker_fee_rate': "FLOAT NOT NULL DEFAULT 0.002",
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'taker_fee_rate': "FLOAT NOT NULL DEFAULT 0.002",
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'is_trading_enabled': "BOOLEAN NOT NULL DEFAULT TRUE",
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'raw_json': "TEXT NOT NULL DEFAULT '{}'",
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'synced_at': "TIMESTAMP WITH TIME ZONE DEFAULT NOW() NOT NULL",
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})
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def _add_missing_columns(table_name: str, columns: dict[str, str]) -> None:
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inspector = inspect(engine)
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existing = {column['name'] for column in inspector.get_columns(table_name)}
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with engine.begin() as conn:
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for name, ddl in columns.items():
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if name not in existing:
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conn.execute(text(f'ALTER TABLE {table_name} ADD COLUMN {name} {ddl}'))
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