74 lines
1.9 KiB
Python
74 lines
1.9 KiB
Python
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from logging.config import fileConfig
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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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# 导入模型
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from app.models.user import Base
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# 导入配置
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from app.core.config import settings
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# 这是Alembic Config对象，它提供对.ini文件中值的访问
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config = context.config
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# 解释配置文件并设置日志记录器
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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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# 添加你的模型元数据对象
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target_metadata = Base.metadata
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# 其他值来自config，可以通过以下方式定义：
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# my_important_option = config.get_main_option("my_important_option")
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# ... 等等。
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def run_migrations_offline() -> None:
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"""在'offline'模式下运行迁移。
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这配置了上下文，只需要一个URL，并且不要求引擎可用。
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跳过引擎创建，甚至不需要DBAPI可用。
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调用context.execute()来执行迁移。
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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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"""在'online'模式下运行迁移。
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在这种情况下，我们创建了一个Engine并将其与迁移上下文关联。
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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, 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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