fix rpc method

@_rpc_groups(["Metadatas", "Resources"])

def set_metas_to_resource(user: User, resource_id: int, metas: dict) -> bool:

def set_metas_to_resource(user: User, resource_id: int, metas: List[dict]) -> bool:

    """

    Sets all metas for a unique metadata set.

    All metas must share the same metadata set.

    """

    # prevent mixing metas from different sets

    # id, value

    metadatasets_ids = []

    for meta_id, meta_value in metas.items():

        meta = Metadata.objects.get(pk=meta_id)

    for meta_dict in metas:

        meta = Metadata.objects.get(pk=meta_dict["id"])

        metadatasets_ids.append(meta.set.pk)

    metadatasets_ids = list(set(metadatasets_ids))

    if len(metadatasets_ids) > 1:

        remove_meta_from_resource(user, resource_id, meta_value.metadata.pk)

    # add metas

    for meta_id, meta_value in metas.items():

        add_meta_to_resource(user, resource_id, meta_id, meta_value)

    for meta_dict in metas:

        add_meta_to_resource(user, resource_id, meta_dict["id"], meta_dict["value"])

    return True