How to use the aldjemy.orm.BaseSQLAModel function in aldjemy

def construct_models(metadata):
    if not metadata.tables:
        generate_tables(metadata)
    tables = metadata.tables
    models = [model for model in get_all_django_models() if not model._meta.proxy]

    sa_models_by_django_models = {}

    for model in models:

        table_name = (
            metadata.schema + '.' + model._meta.db_table
            if metadata.schema else model._meta.db_table
        )
        mixin = getattr(model, 'aldjemy_mixin', None)
        bases = (mixin, BaseSQLAModel) if mixin else (BaseSQLAModel, )
        table = tables[table_name]

        # because querying happens on sqlalchemy side, we can use only one
        # type of queries for alias, so we use 'read' type
        sa_model = type(model._meta.object_name, bases,
                        {'table': table,
                         'alias': router.db_for_read(model)})

        sa_models_by_django_models[model] = sa_model

    for model in models:
        sa_model = sa_models_by_django_models[model]
        table_name = (
            metadata.schema + '.' + model._meta.db_table
            if metadata.schema else model._meta.db_table
        )

def prepare_models():

    tables = get_tables()
    models = get_django_models()

    sa_models_by_django_models = getattr(Cache, 'sa_models', {})

    with warnings.catch_warnings():
        warnings.simplefilter("ignore")
        sa_models_by_table_names = getattr(Cache, 'models', {})

    for model in models:

        table_name = model._meta.db_table
        mixin = getattr(model, 'aldjemy_mixin', None)
        bases = (mixin, BaseSQLAModel) if mixin else (BaseSQLAModel, )
        table = tables[table_name]

        # because querying happens on sqlalchemy side, we can use only one
        # type of queries for alias, so we use 'read' type
        sa_model = type(model._meta.object_name, bases,
                        {'table': table,
                         'alias': router.db_for_read(model)})

        sa_models_by_table_names[table_name] = sa_model
        sa_models_by_django_models[model] = sa_model

    for model in models:
        sa_model = sa_models_by_django_models[model]
        table = tables[model._meta.db_table]
        attrs = _extract_model_attrs(model, sa_models_by_django_models)
        orm.mapper(sa_model, table, attrs)