62 lines
1.7 KiB
Python
62 lines
1.7 KiB
Python
"""Alembic 迁移环境。"""
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import os
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import sys
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from logging.config import fileConfig
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from pathlib import Path
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from alembic import context
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from sqlalchemy import engine_from_config, pool
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ROOT_DIR = Path(__file__).resolve().parents[3]
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if str(ROOT_DIR) not in sys.path:
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sys.path.insert(0, str(ROOT_DIR))
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from web.backend import models # noqa: F401
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from web.backend.database import DATABASE_URL, Base
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config = context.config
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config.set_main_option("sqlalchemy.url", DATABASE_URL)
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# 仅在独立运行 alembic CLI 时配置 logging；应用进程内（如 uvicorn 启动调用
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# run_migrations）跳过 fileConfig，避免它覆盖 uvicorn 已配置的日志处理器，
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# 否则会导致 "Application startup complete" 等启动日志无法输出。
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if config.config_file_name is not None and not os.getenv("ALEMBIC_EMBEDDED"):
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fileConfig(config.config_file_name)
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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。"""
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context.configure(
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url=DATABASE_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 run_migrations_online() -> None:
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"""在线模式直接执行迁移。"""
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connectable = engine_from_config(
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config.get_section(config.config_ini_section, {}),
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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with connectable.connect() as connection:
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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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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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