duxingchen
17105dc9c2
- backend: FastAPI 后端服务 (Python) - frontend: React + Tauri 前端应用 - docker-compose.yml: 容器编排配置
60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
"""Alembic 迁移环境配置 — 异步引擎 + 自动加载模型"""
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import asyncio
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from logging.config import fileConfig
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from alembic import context
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from sqlalchemy.ext.asyncio import create_async_engine
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from app.core.config import settings
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from app.models import Base # 自动发现所有 SQLAlchemy 模型
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# Alembic Config 对象
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config = context.config
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# 日志配置
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if config.config_file_name is not None:
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fileConfig(config.config_file_name)
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# 将 DATABASE_URL 同步到 alembic 配置中（覆盖 alembic.ini 中的占位值）
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config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
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# 自动生成迁移时需要的 models 元数据
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target_metadata = Base.metadata
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def run_migrations_offline() -> None:
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"""离线模式：生成 SQL 脚本而非直接执行"""
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url = config.get_main_option("sqlalchemy.url")
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context.configure(
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url=url,
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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)
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with context.begin_transaction():
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context.run_migrations()
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def do_run_migrations(connection):
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"""在线模式：通过数据库连接执行迁移"""
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context.configure(connection=connection, target_metadata=target_metadata)
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with context.begin_transaction():
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context.run_migrations()
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async def run_migrations_online() -> None:
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"""在线模式：异步引擎"""
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connectable = create_async_engine(
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config.get_main_option("sqlalchemy.url"),
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echo=settings.DEBUG,
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)
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async with connectable.connect() as connection:
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await connection.run_sync(do_run_migrations)
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await connectable.dispose()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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asyncio.run(run_migrations_online())
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