Initial template

template/backend/{% if database == 'postgres' %}migrations{% endif %}/env.py

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+import asyncio
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import Connection
+from sqlalchemy.ext.asyncio import create_async_engine
+from sqlmodel import SQLModel
+
+from utils.db import models  # noqa: F401
+from utils.env import env
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = SQLModel.metadata
+
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=env.db.connection_url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_migrations_online() -> None:
+    engine = create_async_engine(env.db.async_connection_url)
+    async with engine.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+    await engine.dispose()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    asyncio.run(run_migrations_online())

template/backend/{% if database == 'postgres' %}migrations{% endif %}/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+${imports if imports else ""}
+
+revision: str = ${repr(up_revision)}
+down_revision: str | None = ${repr(down_revision)}
+branch_labels: str | Sequence[str] | None = ${repr(branch_labels)}
+depends_on: str | Sequence[str] | None = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}