feat(s2-core)S2内核支持通过“路径”读取嵌套数据结构中的字段值('a.b.c' 或 'a.b[0].c'), 嵌套层级不限（兼容原有平铺字段）。

packages/s2-core/__tests__/unit/data-set/cell-data.nested.spec.ts

@@ -0,0 +1,20 @@
+import { CellData } from '@/data-set/cell-data';
+
+describe('CellData nested value access', () => {
+  const row = {
+    name: '中国',
+    user: { region: '华东', city: '上海' },
+    metrics: { price: 100, city: { address: '测试名称' } },
+  } as Record<string, any>;
+
+  test('VALUE_FIELD from nested extraField', () => {
+    const cell = CellData.getCellData(row as any, 'metrics.city.address');
+
+    expect((cell as any).$$value$$ ?? (cell as any).value).toBeUndefined();
+    expect((cell as any).raw).toBeDefined();
+    expect((cell as any).value).toBeUndefined();
+    expect((cell as any).getValueByField('metrics.city.address')).toBe(
+      '测试名称',
+    );
+  });
+});

packages/s2-core/__tests__/unit/utils/accessor.spec.ts

@@ -0,0 +1,26 @@
+import { getByPath, hasByPath } from '../../../src/utils/accessor';
+
+describe('utils/accessor nested path', () => {
+  const row = {
+    name: '中国',
+    user: { region: '华东', city: '上海' },
+    metrics: { price: 100, city: { address: '测试名称' } },
+  } as Record<string, any>;
+
+  test('getByPath supports flat key', () => {
+    expect(getByPath(row, 'name')).toBe('中国');
+  });
+
+  test('getByPath supports level-2 path', () => {
+    expect(getByPath(row, 'user.region')).toBe('华东');
+  });
+
+  test('getByPath supports level-3 path', () => {
+    expect(getByPath(row, 'metrics.city.address')).toBe('测试名称');
+  });
+
+  test('hasByPath works for existing and missing paths', () => {
+    expect(hasByPath(row, 'metrics.price')).toBe(true);
+    expect(hasByPath(row, 'metrics.missing')).toBe(false);
+  });
+});

packages/s2-core/__tests__/unit/utils/pivot-data-set.nested.spec.ts

@@ -0,0 +1,28 @@
+import {
+  getExistValues,
+  transformDimensionsValues,
+} from '../../../src/utils/dataset/pivot-data-set';
+
+describe('pivot dataset nested paths', () => {
+  const row = {
+    name: '中国',
+    user: { region: '华东', city: '上海' },
+    metrics: { price: 100, city: { address: '测试名称' } },
+  } as Record<string, any>;
+
+  test('transformDimensionsValues supports nested paths', () => {
+    const dims = ['user.region', 'user.city', 'metrics.city.address'];
+    const values = transformDimensionsValues(row, dims);
+
+    expect(values).toEqual(['华东', '上海', '测试名称']);
+  });
+
+  test('getExistValues supports nested values', () => {
+    const values = ['name', 'metrics.price', 'metrics.missing'];
+
+    expect(getExistValues(row as any, values)).toEqual([
+      'name',
+      'metrics.price',
+    ]);
+  });
+});

packages/s2-core/src/data-set/base-data-set.ts

@@ -31,6 +31,7 @@ import type {
 import type { ValueRange } from '../common/interface/condition';
 import type { Node } from '../facet/layout/node';
 import type { SpreadSheet } from '../sheet-type';
+import { getByPath } from '../utils/accessor';
 import {
   getValueRangeState,
   setValueRangeState,
@@ -317,7 +318,7 @@ export abstract class BaseDataSet {
 
     const fieldValues = compact(
       map(this.originData, (item) => {
-        const value = item[field] as string;
+        const value = getByPath<string>(item, field);
 
         return isNil(value) ? null : Number.parseFloat(value);
       }),

packages/s2-core/src/data-set/cell-data.ts

@@ -2,6 +2,7 @@
 import { EXTRA_FIELD, ORIGIN_FIELD, VALUE_FIELD } from '../common/constant';
 import type { ViewMetaData } from '../common/interface/basic';
 import type { RawData } from '../common/interface/s2DataConfig';
+import { getByPath } from '../utils/accessor';
 
 export class CellData {
   constructor(
@@ -22,7 +23,7 @@ export class CellData {
       return field ? data.getValueByField(field) : data[ORIGIN_FIELD];
     }
 
-    return data?.[field];
+    return getByPath(data as unknown as Record<string, any>, field);
   }
 
   get [ORIGIN_FIELD]() {
@@ -34,14 +35,23 @@ export class CellData {
   }
 
   get [VALUE_FIELD]() {
-    return this.raw[this.extraField];
+    // 为保持向后兼容：当 extraField 为嵌套路径（如 a.b.c 或 a.b[0].c）时，不将其暴露为 $$value$$
+    // 仅当 extraField 为顶层字段时，才通过 $$value$$ 快捷访问
+    if (
+      this.extraField &&
+      (this.extraField.includes('.') || this.extraField.includes('['))
+    ) {
+      return undefined;
+    }
+
+    return getByPath(this.raw, this.extraField);
   }
 
   getValueByField(field: string) {
     if (field === VALUE_FIELD || field === EXTRA_FIELD) {
       return this[field];
     }
 
-    return this.raw[field];
+    return getByPath(this.raw, field);
   }
 }

packages/s2-core/src/data-set/table-data-set.ts

@@ -7,6 +7,7 @@ import type {
   SimpleData,
 } from '../common/interface';
 import { getEmptyPlaceholder } from '../utils';
+import { getByPath } from '../utils/accessor';
 import { isAscSort, isDescSort } from '../utils/sort-action';
 import { BaseDataSet } from './base-data-set';
 import type { GetCellDataParams, GetCellMultiDataParams } from './interface';
@@ -67,7 +68,7 @@ export class TableDataSet extends BaseDataSet {
     each(this.filterParams, ({ filterKey, filteredValues, customFilter }) => {
       const filteredValuesSet = new Set(filteredValues);
       const defaultFilterFunc = (row: RawData) =>
-        !filteredValuesSet.has(row[filterKey]);
+        !filteredValuesSet.has(getByPath(row, filterKey) as any);
 
       const filteredData = filter(this.displayData, (row) => {
         if (customFilter) {
@@ -105,7 +106,7 @@ export class TableDataSet extends BaseDataSet {
           for (let index = 0; index < keys.length; index++) {
             const k = keys[index];
 
-            if (record[k] !== query[k]) {
+            if (getByPath(record, k) !== query[k]) {
               inScope = false;
               restData.push(record);
               break;
@@ -130,8 +131,12 @@ export class TableDataSet extends BaseDataSet {
         const reversedSortBy = [...sortBy].reverse();
 
         sortedData = data.sort((a, b) => {
-          const idxA = reversedSortBy.indexOf(a[sortFieldId] as string);
-          const idxB = reversedSortBy.indexOf(b[sortFieldId] as string);
+          const idxA = reversedSortBy.indexOf(
+            getByPath(a, sortFieldId) as string,
+          );
+          const idxB = reversedSortBy.indexOf(
+            getByPath(b, sortFieldId) as string,
+          );
 
           return idxB - idxA;
         });
@@ -143,11 +148,11 @@ export class TableDataSet extends BaseDataSet {
         const customSortBy = isFunction(sortBy) ? sortBy : null;
         const customSort = (record: RawData) => {
           // 空值占位符按最小值处理 https://github.com/antvis/S2/issues/2707
-          if (record[sortFieldId] === placeholder) {
+          if (getByPath(record, sortFieldId) === placeholder) {
             return Number.MIN_VALUE;
           }
 
-          return record[sortFieldId];
+          return getByPath(record, sortFieldId) as any;
         };
 
         sortedData = orderBy(
@@ -183,7 +188,7 @@ export class TableDataSet extends BaseDataSet {
       return rowData as Data;
     }
 
-    return rowData[query['field']] as SimpleData;
+    return getByPath(rowData, query['field']) as SimpleData;
   }
 
   public getCellMultiData(
@@ -201,7 +206,7 @@ export class TableDataSet extends BaseDataSet {
       return rowData as Data[];
     }
 
-    return rowData.map((item) => item[query['field']]) as Data[];
+    return rowData.map((item) => getByPath(item, query['field'])) as Data[];
   }
 
   public getRowData(cell: CellMeta) {

packages/s2-core/src/utils/accessor.ts

@@ -0,0 +1,29 @@
+import { get, has } from 'lodash';
+
+export function getByPath<T = any>(
+  record: Record<string, any>,
+  field: string,
+): T {
+  if (!record || !field) {
+    return undefined as any;
+  }
+
+  // fast path for flat keys
+  if (field.indexOf('.') === -1 && field.indexOf('[') === -1) {
+    return record[field] as any;
+  }
+
+  return get(record, field) as any;
+}
+
+export function hasByPath(record: Record<string, any>, field: string): boolean {
+  if (!record || !field) {
+    return false;
+  }
+
+  if (field.indexOf('.') === -1 && field.indexOf('[') === -1) {
+    return Object.prototype.hasOwnProperty.call(record, field);
+  }
+
+  return has(record, field);
+}

packages/s2-core/src/utils/dataset/pivot-data-set.ts

@@ -7,7 +7,6 @@ import {
   intersection,
   isArray,
   isEmpty,
-  isNull,
   isString,
   last,
   set,
@@ -36,6 +35,7 @@ import type {
   TotalStatus,
 } from '../../data-set/interface';
 import type { Node } from '../../facet/layout/node';
+import { getByPath, hasByPath } from '../accessor';
 import { generateNillString } from '../layout/generate-id';
 
 export function filterExtraDimension(dimensions: CustomHeaderFields = []) {
@@ -68,9 +68,10 @@ export function transformDimensionsValues(
   placeholder = TOTAL_VALUE,
 ): string[] {
   return dimensions.reduce((res: string[], dimension: string) => {
-    const value = record[dimension];
+    const exists = hasByPath(record, dimension);
+    const value = exists ? (getByPath(record, dimension) as string) : undefined;
 
-    if (!(dimension in record)) {
+    if (!exists) {
       res.push(placeholder);
     } else {
       res.push(generateNillString(value as string));
@@ -81,7 +82,7 @@ export function transformDimensionsValues(
 }
 
 export function getExistValues(data: RawData, values: string[]) {
-  const result = values.filter((v) => v in data);
+  const result = values.filter((v) => hasByPath(data, v));
 
   if (isEmpty(result)) {
     result.push(EMPTY_EXTRA_FIELD_PLACEHOLDER);
@@ -99,9 +100,10 @@ function transformDimensionsValuesWithExtraFields(
 
   function transform(data: RawData, fields: string[], valueField?: string) {
     return fields.reduce((res: string[], dimension: string) => {
-      const value = data[dimension];
+      const exists = hasByPath(data, dimension);
+      const value = exists ? (getByPath(data, dimension) as string) : undefined;
 
-      if (!(dimension in data)) {
+      if (!exists) {
         if (dimension === EXTRA_FIELD && valueField) {
           res.push(valueField);
         } else {
@@ -406,7 +408,7 @@ export function deleteMetaById(meta: PivotMeta, nodeId: string) {
   const deletePath = last(paths);
   let currentMeta = meta;
 
-  forEach(paths, (path, idx) => {
+  forEach(paths, (path: string, idx: number) => {
     const pathMeta = currentMeta.get(path);
 
     if (pathMeta) {
@@ -467,14 +469,14 @@ export function getHeaderTotalStatus(row: Node, col: Node): TotalStatus {
  *    需要将其拓展成多个结构 =>  [MULTI_VALUE, 女] => [[四川，女], [北京，女], ....] => [[1,1],[2,1],[3,2]....]
  */
 export function existDimensionTotalGroup(path: string[]) {
-  let multiIdx = null;
+  let multiIdx: number | null = null;
 
   for (let i = 0; i < path.length; i++) {
     const element = path[i];
 
     if (isMultiValue(element)) {
       multiIdx = i;
-    } else if (!isNull(multiIdx) && multiIdx < i) {
+    } else if (multiIdx !== null && multiIdx < i) {
       return true;
     }
   }
@@ -505,7 +507,7 @@ export function getSatisfiedPivotMetaValues(params: {
   let metaValueList = [rootContainer];
 
   function flattenMetaValue(list: PivotMetaValue[], field: string) {
-    const allValues = flatMap(list, (metaValue) => {
+    const allValues = flatMap(list, (metaValue: PivotMetaValue) => {
       const values: PivotMetaValue[] = [];
 
       for (const v of metaValue.children.values()) {
@@ -528,7 +530,8 @@ export function getSatisfiedPivotMetaValues(params: {
       );
 
       allValues.sort(
-        (a, b) => (indexMap.get(a.id) ?? 0) - (indexMap.get(b.id) ?? 0),
+        (a: PivotMetaValue, b: PivotMetaValue) =>
+          (indexMap.get(a.id) ?? 0) - (indexMap.get(b.id) ?? 0),
       );
 
       return allValues;

packages/s2-core/src/utils/export/copy/table-copy.ts

@@ -11,6 +11,7 @@ import type {
 } from '../../../common/interface/export';
 import type { Node } from '../../../facet/layout/node';
 import type { SpreadSheet } from '../../../sheet-type';
+import { getByPath } from '../../accessor';
 import {
   getColNodeFieldFromNode,
   getSelectedCols,
@@ -74,7 +75,7 @@ class TableDataCellCopy extends BaseDataCellCopy {
           rowIndex: i,
           colIndex: j,
         });
-        const value = row?.[field];
+        const value = getByPath(row, field);
 
         return formatter(value);
       }),
@@ -124,8 +125,8 @@ class TableDataCellCopy extends BaseDataCellCopy {
                   rowIndex,
                   colIndex: i,
                 });
-                const value = rowData[field];
-                const dataItem = formatter(value);
+                const value = getByPath(rowData, field);
+                const dataItem = formatter(value as any);
 
                 row.push(dataItem as string);
               }
@@ -174,7 +175,7 @@ class TableDataCellCopy extends BaseDataCellCopy {
     )!;
     const value = this.isSeriesNumberField(field)
       ? meta.rowIndex + 1
-      : this.displayData[meta.rowIndex]?.[field];
+      : getByPath(this.displayData[meta.rowIndex], field);
 
     const formatter = this.getFormatter({
       field,