backend/alembic/env.py

# backend/alembic/env.py

from logging.config import fileConfig

from sqlalchemy import engine_from_config
from sqlalchemy.pool import NullPool

from alembic import context

# This is the crucial part: we import our app's config and models
import sys
import os
sys.path.insert(0, os.path.realpath(os.path.join(os.path.dirname(__file__), '..')))

from core.config import settings
from core.database import Base
from models.analysis_job import AnalysisJob

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# This line is IMPORTANT: it tells Alembic to use our app's settings for the DB URL
config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)

# Interpret the config file for Python logging.
# This line reads the logging configuration from alembic.ini
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
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:
    """Run migrations in 'online' mode."""
    connectable = engine_from_config(
        config.get_section(config.config_main_section, {}),
        prefix="sqlalchemy.",
        poolclass=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()