80 lines
2.0 KiB
Python
80 lines
2.0 KiB
Python
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"""
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Alembic 环境配置。
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"""
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from logging.config import fileConfig
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import os
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import sys
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from sqlalchemy import engine_from_config
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from sqlalchemy import pool
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from alembic import context
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# 将父目录添加到路径以进行导入
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(__file__))))
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# 从项目根目录加载 .env（从 alembic 目录向上 3 级）
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from dotenv import load_dotenv
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project_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__)))))
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env_path = os.path.join(project_root, '.env')
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load_dotenv(env_path)
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from app.config import Settings
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from app.db.models import Base
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# 这是 Alembic 配置对象
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config = context.config
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# 为 Python 日志解释配置文件
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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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# 加载设置并设置数据库 URL
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settings = Settings()
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config.set_main_option("sqlalchemy.url", settings.database_url)
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# 为 'autogenerate' 支持添加模型的 MetaData 对象
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target_metadata = Base.metadata
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def run_migrations_offline() -> None:
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"""
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在 'offline' 模式下运行迁移。
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"""
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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 run_migrations_online() -> None:
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"""
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在 'online' 模式下运行迁移。
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"""
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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(
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connection=connection,
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target_metadata=target_metadata
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)
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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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