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FlowingCode / GridExporterAddon

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Cannot export one-column grid as XLS #124

Open javier-godoy opened 1 month ago

javier-godoy commented 1 month ago

Describe the bug

java.lang.IllegalArgumentException: Merged region A1 must contain 2 or more cells at org.apache.poi.xssf.usermodel.XSSFSheet.addMergedRegion(XSSFSheet.java:338) at org.apache.poi.xssf.usermodel.XSSFSheet.addMergedRegion(XSSFSheet.java:303) at com.flowingcode.vaadin.addons.gridexporter.ExcelStreamResourceWriter.createWorkbook(ExcelStreamResourceWriter.java:106) at com.flowingcode.vaadin.addons.gridexporter.ExcelStreamResourceWriter.accept(ExcelStreamResourceWriter.java:81) ...

Expected behavior

It should be possible to export a one-column grid.

Minimal reproducible example

Grid<Row> grid = new Grid<>();
grid.addColumn(Row::getNumber).setHeader("Number");
GridExporter<Row> exporter = GridExporter.createFor(grid);
grid.setItems(...);

Add-on Version

2.3.3-SNAPSHOT

Vaadin Version

24.3.9

Additional information

No response