Function querySeriesUpstreamDatasetModel

src/data/helper/sourceHelper.ts:289–309

(
    seriesModel: SeriesEncodableModel
)

 * @return If return null/undefined, indicate that should not use datasetModel.
 */
export function querySeriesUpstreamDatasetModel(
    seriesModel: SeriesEncodableModel
): DatasetModel {
    // Caution: consider the scenario:
    // A dataset is declared and a series is not expected to use the dataset,
    // and at the beginning `setOption({series: { noData })` (just prepare other
    // option but no data), then `setOption({series: {data: [...]}); In this case,
    // the user should set an empty array to avoid that dataset is used by default.
    const thisData = seriesModel.get('data', true);
    if (!thisData) {
        return queryReferringComponents(
            seriesModel.ecModel,
            'dataset',
            {
                index: seriesModel.get('datasetIndex', true),
                id: seriesModel.get('datasetId', true)
            },
            SINGLE_REFERRING
        ).models[0] as DatasetModel;
    }
}

/**
 * @return Always return an array event empty.