def database_extras()

in composer_local_dev/environment.py [0:0]


    def database_extras(self) -> Dict[str, Dict]:
        env_path = self.env_dir_path
        extras = {
            constants.DatabaseEngine.sqlite3: {
                "mounts": {
                    "folders": {},
                    "files": {
                        env_path / "airflow.db": "airflow/airflow.db",
                    }
                },
                "env_vars": {},
                "ports": {},
            },
            constants.DatabaseEngine.postgresql: {
                "mounts": {
                    "folders": {
                        env_path / "postgresql_data": "/var/lib/postgresql/data",
                    },
                    "files": {
                        env_path / ".keep": "airflow/.keep",
                    }
                },
                "env_vars": {
                    "PGDATA": "/var/lib/postgresql/data/pgdata",
                    "POSTGRES_USER": "postgres",
                    "POSTGRES_PASSWORD": "airflow",
                    "POSTGRES_DB": "airflow",
                    "AIRFLOW__DATABASE__SQL_ALCHEMY_CONN": f"postgresql+psycopg2://postgres:airflow@{self.db_container_name}:5432/airflow",
                },
                "ports": {
                    f"5432/tcp": "25432",
                },
            },
        }
        if self.database_engine in extras:
            return extras[self.database_engine]

        return extras[constants.DatabaseEngine.sqlite3]