feat: Phase 3 - 工具层 + 测试 + 数据库迁移

migrations/env.py

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+"""
+Alembic 环境配置
+"""
+from logging.config import fileConfig
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from alembic import context
+import os
+import sys
+
+# 添加项目路径
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from app.extensions import db
+from app.config import Config
+
+# Alembic Config 对象
+config = context.config
+
+# 配置日志
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# 模型元数据
+target_metadata = db.Model.metadata
+
+def get_url():
+    """获取数据库 URL"""
+    return os.getenv('DATABASE_URL', 'sqlite:///pit_router.db')
+
+
+def run_migrations_offline() -> None:
+    """离线迁移"""
+    url = get_url()
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """在线迁移"""
+    configuration = config.get_section(config.config_ini_section)
+    configuration["sqlalchemy.url"] = get_url()
+    connectable = engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()