env.py

# migrations/env.py
import os
import sys
from logging.config import fileConfig

from sqlalchemy import engine_from_config
from sqlalchemy import pool

from alembic import context

# Add the src directory to Python path
current_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
src_dir = os.path.join(current_dir, "src")
sys.path.append(src_dir)

# Import your models and Base
from paste.database import Base

# Import all your models here
# this is the Alembic Config object
config = context.config

# Interpret the config file for Python logging.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

from paste.config import get_settings

config.set_main_option("sqlalchemy.url", get_settings().SQLALCHEMY_DATABASE_URL)


# Add metadata to the context
target_metadata = Base.metadata


def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode."""
    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 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()