from backend.app.db.connection import db_engine
from backend.app.db.models.materials import Material
from sqlalchemy.orm import sessionmaker


def get_materials():
    """
    This function will retrieve all materials from the database.
    :return: A list of Material objects if successful, an empty list otherwise.
    """
    Session = sessionmaker(bind=db_engine)
    with Session() as session:
        materials = session.query(Material).all()

    return materials if materials else []