85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
"""Alembic 迁移环境：从 core.config 取连接串，metadata 由全部模型填充。"""
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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 alembic import context
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from sqlalchemy import create_mock_engine, engine_from_config, pool
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# 将 src 加入 sys.path（与 scripts/init_db.py 一致），使 core / modules 可导入
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_SRC_DIR = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "src")
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def _setup_src_path():
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if _SRC_DIR not in sys.path:
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sys.path.insert(0, _SRC_DIR)
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_setup_src_path()
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from core.config import SQLALCHEMY_DATABASE_URL
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from core.database import Base
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# 加载全部模型以填充 metadata（create_app 会连带导入所有业务模块）
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from core.app import create_app
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create_app()
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config = context.config
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# set_section_option 不做 % 插值，避免 URL 中特殊字符被 configparser 转义
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# 取当前活跃驱动连接串（DB_DRIVER 切换后 alembic 自动跟随）
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config.set_section_option("alembic", "sqlalchemy.url", SQLALCHEMY_DATABASE_URL)
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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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target_metadata = Base.metadata
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def run_migrations_offline() -> None:
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"""离线模式：不连库，将迁移编译为 SQL 输出。"""
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url = config.get_main_option("sqlalchemy.url")
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if url.startswith("mssql"):
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# 上游 bug workaround：mssql 离线渲染列注释时 dialect.default_schema_name 为 None
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# （离线无服务器探活），quote_schema(None) 触发 AttributeError；显式补 'dbo' 可完整渲染。
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# create_mock_engine 把原始 DDL 构造体交给 executor，须用同一 dialect 编译成真正 SQL。
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def _dump_mssql(sql, *multiparams, **params):
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print(sql.compile(dialect=mock_connection.dialect, literal_binds=True))
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mock_connection = create_mock_engine(url, _dump_mssql)
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mock_connection.dialect.default_schema_name = "dbo"
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context.configure(
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connection=mock_connection,
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target_metadata=target_metadata,
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literal_binds=True,
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)
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else:
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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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"""在线模式：连接数据库执行迁移。"""
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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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