Add source

alembic/env.py

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+"""
+Alembic environment configuration for async SQLAlchemy
+"""
+from logging.config import fileConfig
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+
+from alembic import context
+
+# Import settings and models
+import sys
+from pathlib import Path
+
+# Add project root to path
+project_root = Path(__file__).parent.parent
+sys.path.insert(0, str(project_root))
+
+from shared.config import settings
+from shared.database.models import Base
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# Set target metadata for autogenerate
+target_metadata = Base.metadata
+
+# Override sqlalchemy.url from settings if not set in alembic.ini
+if config.get_main_option("sqlalchemy.url") == "driver://user:pass@localhost/dbname":
+    config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
+
+
+def run_migrations_offline() -> None:
+    """
+    Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=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:
+    """
+    Run migrations with the given connection.
+    """
+    context.configure(
+        connection=connection, 
+        target_metadata=target_metadata,
+        compare_type=False  # Disable autogenerate comparison to use explicit migration definitions
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations() -> None:
+    """
+    Run migrations in 'online' mode with async engine.
+    """
+    # Get database URL from settings
+    database_url = settings.DATABASE_URL
+    
+    # Create async engine from config
+    configuration = config.get_section(config.config_ini_section, {})
+    configuration["sqlalchemy.url"] = database_url
+    
+    connectable = async_engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+
+def run_migrations_online() -> None:
+    """
+    Run migrations in 'online' mode.
+    
+    For async SQLAlchemy, we use asyncio to run async migrations.
+    """
+    import asyncio
+    
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()