`alembic_migrations/env.py`¶

Item	Value
Layer	Database Migration
Responsibility	Configures Alembic for database schema migrations
Status	🟢 Done

1. Purpose¶

This file configures Alembic, the database migration tool used with SQLAlchemy, to handle schema changes and version control for the database. It provides the connection between the application models and the migration system.

2. Public API¶

This file doesn't export symbols for use in other modules but configures Alembic's functionality:

Symbol	Type	Description
`run_migrations_offline`	function	Runs migrations without a database connection
`run_migrations_online`	function	Runs migrations with a live database connection

3. Behaviour & Edge-Cases¶

Uses the SQLAlchemy metadata from the Base class to detect model changes
Supports both online and offline migration modes
Ensures proper Python import paths for finding models
Configures database connection based on Alembic's configuration

4. Dependencies¶

Internal:
backend.models.base: For accessing the Base.metadata for migrations
External:
alembic: For migration functionality
sqlalchemy: For database connectivity

5. Migration Files¶

Migration file	Purpose
`alembic/versions/9fc3acc47815_initial_migration_users_and_files_tables.py`	Initial schema with User and File tables

6. Open TODOs¶

Add custom migration templates for consistency
Configure multi-database support if needed
Add post-migration verification hooks