fix: the error of exporting long texts (#6713)

* fix: the error of exporting long texts

packages/plugins/@nocobase/plugin-action-export/src/server/__tests__/export-to-xlsx.test.ts

@@ -1499,4 +1499,37 @@ describe('export to xlsx', () => {
     expect(sheetData[1]).toEqual(['user0', 0]); // first user
     expect(sheetData[10]).toEqual(['user9', 9]); // last user
   });
+
+  it('should import rich text field successfully when long text', async () => {
+    const Test = app.db.collection({
+      name: 'tests',
+      fields: [
+        {
+          interface: 'richText',
+          type: 'text',
+          name: 'richText',
+        },
+      ],
+    });
+
+    await app.db.sync();
+    const data = require('./data/rich-text.json');
+    const longText = data.longText;
+    await Test.repository.create({
+      values: {
+        richText: longText /* .slice(0, 10000) */,
+      },
+    });
+    const exporter = new XlsxExporter({
+      collectionManager: app.mainDataSource.collectionManager,
+      collection: Test,
+      chunkSize: 10,
+      limit: 10,
+      columns: [{ dataIndex: ['richText'], defaultTitle: 'richText' }],
+    });
+
+    const wb = await exporter.run();
+    const buffer = XlsxExporter.xlsxSafeWrite(wb, { type: 'buffer', bookType: 'xlsx' });
+    expect(buffer).exist;
+  });
 });

packages/plugins/@nocobase/plugin-action-export/src/server/actions/export-xlsx.ts

@@ -45,7 +45,7 @@ async function exportXlsxAction(ctx: Context, next: Next) {
 
   const wb = await xlsxExporter.run(ctx);
 
-  ctx.body = XLSX.write(wb, { type: 'buffer', bookType: 'xlsx' });
+  ctx.body = XlsxExporter.xlsxSafeWrite(wb, { type: 'buffer', bookType: 'xlsx' });
 
   ctx.set({
     'Content-Type': 'application/octet-stream',

packages/plugins/@nocobase/plugin-action-export/src/server/services/xlsx-exporter.ts

@@ -1,3 +1,12 @@
+/**
+ * This file is part of the NocoBase (R) project.
+ * Copyright (c) 2020-2024 NocoBase Co., Ltd.
+ * Authors: NocoBase Team.
+ *
+ * This project is dual-licensed under AGPL-3.0 and NocoBase Commercial License.
+ * For more information, please refer to: https://www.nocobase.com/agreement.
+ */
+
 import XLSX from 'xlsx';
 import { BaseExporter, ExportOptions } from './base-exporter';
 import { NumberField } from '@nocobase/database';
@@ -12,6 +21,8 @@ type XlsxExportOptions = Omit<ExportOptions, 'fields'> & {
   columns: Array<ExportColumn>;
 };
 
+const XLSX_LIMIT_CHAER = 32767;
+
 export class XlsxExporter extends BaseExporter<XlsxExportOptions & { fields: Array<Array<string>> }> {
   /**
    * You can adjust the maximum number of exported rows based on business needs and system
@@ -88,6 +99,17 @@ export class XlsxExporter extends BaseExporter<XlsxExportOptions & { fields: Arr
       return col.title || fieldInstance?.options.title || col.defaultTitle;
     });
   }
+
+  static xlsxSafeWrite(wb: XLSX.WorkBook, opts: XLSX.WritingOptions, path?: string) {
+    const data = wb.Sheets.Data as object;
+    for (const key of Object.keys(data)) {
+      const v = data[key]?.v;
+      if (v?.length > XLSX_LIMIT_CHAER) {
+        data[key].v = v.slice(0, XLSX_LIMIT_CHAER);
+      }
+    }
+    return path ? XLSX.writeFileXLSX(wb, path) : XLSX.write(wb, opts);
+  }
 }
 
 function isNumeric(n) {