from model.course_model import Course


def add_course_dao(o, db):
    try:
        c = Course(**o)
        db.add(c)
    except:
        db.rollback()
        return False
    else:
        db.commit()
        return True


def get_all_courses_dao(db):
    return db.query(Course).filter(Course.is_deleted == 0).all()


def get_course_by_id_dao(course_id, db):
    return db.query(Course).filter(
        Course.course_id == course_id,
        Course.is_deleted == 0
    ).first()