[Fix]: #1795 remove unnecessary code

Author: iamfaran

client/packages/lowcoder/src/comps/comps/tableComp/tableComp.tsx

@@ -99,65 +99,16 @@ export class TableImplComp extends TableInitComp implements IContainer {
   }
 
   downloadData(fileName: string) {
-    const allDisplayData = (this as any).exposingValues["displayData"];
+    // displayData already contains only visible columns (filtered in transformDispalyData)
+    const displayData = (this as any).exposingValues["displayData"];
     const delimiter = this.children.toolbar.children.columnSeparator.getView();
 
-    try {
-      // Build the set of visible column keys as shown to the user (title or dataIndex)
-      const enableColumnSetting = this.children.toolbar.children.columnSetting.getView();
-      const visibleColumnKeys = new Set<string>();
-      this.children.columns.getView().forEach((col) => {
-        const colView = col.getView();
-        const isHidden = columnHide({
-          hide: colView.hide,
-          tempHide: colView.tempHide,
-          enableColumnSetting,
-        });
-        if (!isHidden) {
-          const headerKey = (colView.title as any) || colView.dataIndex;
-          if (headerKey) {
-            visibleColumnKeys.add(String(headerKey));
-          }
-        }
-      });
-
-      const pickVisible = (row: any): any => {
-        const result: any = {};
-        // copy only allowed keys
-        Object.keys(row || {}).forEach((key) => {
-          if (key !== COLUMN_CHILDREN_KEY && visibleColumnKeys.has(key)) {
-            result[key] = row[key];
-          }
-        });
-        // retain children recursively if present
-        if (Array.isArray(row?.[COLUMN_CHILDREN_KEY])) {
-          const children = row[COLUMN_CHILDREN_KEY].map((r: any) => pickVisible(r));
-          if (children.length) {
-            result[COLUMN_CHILDREN_KEY] = children;
-          }
-        }
-        return result;
-      };
-
-      const dataToSave = Array.isArray(allDisplayData)
-        ? allDisplayData.map((r: any) => pickVisible(r))
-        : allDisplayData;
-
-      saveDataAsFile({
-        data: dataToSave,
-        filename: fileName,
-        fileType: "csv",
-        delimiter,
-      });
-    } catch (_e) {
-      // Fallback to previous behavior if anything goes wrong
-      saveDataAsFile({
-        data: allDisplayData,
-        filename: fileName,
-        fileType: "csv",
-        delimiter,
-      });
-    }
+    saveDataAsFile({
+      data: displayData,
+      filename: fileName,
+      fileType: "csv",
+      delimiter,
+    });
   }
 
   refreshData(allQueryNames: Array<string>, setLoading: (loading: boolean) => void) {

client/packages/lowcoder/src/comps/comps/tableComp/tableUtils.tsx

@@ -209,7 +209,8 @@ export function transformDispalyData(
   return oriDisplayData.map((row) => {
     const transData = _(row)
       .omit(OB_ROW_ORI_INDEX)
-      .mapKeys((value, key) => dataIndexTitleDict[key] || key)
+      .pickBy((value, key) => key in dataIndexTitleDict) // Only include columns in the dictionary
+      .mapKeys((value, key) => dataIndexTitleDict[key])
       .value();
     if (Array.isArray(row[COLUMN_CHILDREN_KEY])) {
       return {