little update

alembic/env.py

@@ -0,0 +1,48 @@
+from logging.config import fileConfig
+import os
+from pathlib import Path
+import sys
+
+from alembic import context
+from dotenv import load_dotenv
+from sqlalchemy import engine_from_config, pool
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(PROJECT_ROOT / "src"))
+load_dotenv(PROJECT_ROOT / ".env")
+
+from database.models import Base
+
+config = context.config
+if database_url := os.getenv("DATABASE_URL"):
+    config.set_main_option("sqlalchemy.url", database_url)
+if config.config_file_name:
+    fileConfig(config.config_file_name)
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=config.get_main_option("sqlalchemy.url"),
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}), 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()