Grouping

getGroupingData

Extracts grouping data from the store for a specific row

@param store - The data store * @param itemIndex - The index of the current item * @param currentDepth - The current depth of the grouping * @param columnProp - The column property to aggregate * @param aggregator - The aggregation function to apply * @returns An object containing the count, values, and aggregation result

export function getGroupingData({
  store,
  itemIndex,
  currentDepth,
  columnProp,
  aggregator,
}: {
  store: Observable<any>,
  itemIndex: number,
  currentDepth: number,
  columnProp: ColumnProp,
  aggregator?: (values: any[]) => any
}): GroupingData;

---

GroupingAggregationTemplate

The GroupingAggregationTemplate type defines the structure of aggregation functions that can be used for grouping in a RevoGrid.

/**
 * The `GroupingAggregationTemplate` type defines the structure of aggregation functions
 * that can be used for grouping in a RevoGrid.
 */
export type GroupingAggregationTemplate =  {
  aggregations?: { [key: string]: (values: any[]) => any };
}

---

GroupingData

The GroupingData type defines the structure of data returned by the getGroupingData function

/**
 * The `GroupingData` type defines the structure of data returned by the getGroupingData function
 */
export type GroupingData =  {
  count: number;
  values: DataType[];
  aggregationValue: any;
};

---

groupingAggregation

The groupingAggregation function is a template for creating custom aggregation functions that can be used for grouping in a RevoGrid.

This function takes a template object with an optional aggregations property, which is a key-value pair where the key is the column property name and the value is an aggregation function. The aggregation functions receive an array of values and return a single aggregated result.

Example

const aggregations = {
  'name': (values: any[]) => values.map(item => item.name).join(', ')
}

const template: GroupLabelTemplateFunc = (h, props) => {
  return groupingAggregation(h, props, aggregations);
}

const grid = document.createElement('revo-grid');
grid.columns = [
  { prop: 'name', name: 'Name', template: template }
]

groupingAggregation: GroupLabelTemplateFunc;