refactor: update migration paths and improve database operation handling

backend/migrations/env.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+import sys
+from logging.config import fileConfig
+from pathlib import Path
+
+from sqlalchemy import engine_from_config, pool
+from sqlmodel import SQLModel
+
+from alembic import context
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.append(str(PROJECT_ROOT))
+
+from app import models  # noqa: E402,F401
+from app.core.config import settings  # noqa: E402
+
+config = context.config
+
+if config.config_file_name is not None and config.attributes.get("configure_logger", True):
+    fileConfig(config.config_file_name)
+
+target_metadata = SQLModel.metadata
+
+
+def _normalize_database_url(database_url: str) -> str:
+    if "://" not in database_url:
+        return database_url
+    scheme, rest = database_url.split("://", 1)
+    if scheme == "postgresql":
+        return f"postgresql+psycopg://{rest}"
+    return database_url
+
+
+def get_url() -> str:
+    return _normalize_database_url(settings.database_url)
+
+
+config.set_main_option("sqlalchemy.url", get_url())
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=get_url(),
+        target_metadata=target_metadata,
+        literal_binds=True,
+        compare_type=True,
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    configuration = config.get_section(config.config_ini_section) or {}
+    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,
+            compare_type=True,
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()