backend/alembic/env.py

from logging.config import fileConfig
from sqlalchemy import engine_from_config
from sqlalchemy.pool import NullPool
from alembic import context
import sys
import os

# Make sure the app's modules can be found
sys.path.insert(0, os.path.realpath(os.path.join(os.path.dirname(__file__), '..')))

from core.config import settings
from core.database import Base
# Import all your models here so Alembic can see them
from models.analysis_job import AnalysisJob 

config = context.config

# Set the database URL from our application's settings
config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)

if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Set the target metadata for autogenerate
target_metadata = Base.metadata

def run_migrations_offline() -> None:
    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=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()