importing a sample excel sheet from database postgresql - node.js

Question

I want to import an excel sheet from a database containing state list with a foreign key of countries.
What I want to do is the column for the country to become a dropdown list so that I could enter the state name with the reference country name selected from the country dropdown:
const getStateSampleFile = async (req, res) => {
try {
const countryData = await Countries.findAll({
where: { deleted: false },
});
const workbook = new excelJS.Workbook();
const workSheet = workbook.addWorksheet('StateData');
workSheet.columns = [
// { header: 'S.no', key: 's_no', width: 20 },
{ header: 'Countries', key: 'Countries', width: 20 },
{ header: 'States', key: 'state', width: 20 },
];
// let count = 1;
countryData.forEach((country) => {
// country.s_no = count;
country.Countries = country.name;
// workSheet.addRow(country);
// count += 1;
// return dropList.push({ dlist });
return country.name;
// console.log(dlist,'98989')
// return country.name;
});
// console.log(dlist, '909099090');
workSheet.getCell('A1').dataValidation = {
type: 'list',
allowBlank: true,
formulae: [],
};
workSheet.getRow(1).eachCell((cell) => {
cell.font = { bold: true };
});
const filename = `States${Date.now()}.xlsx`;
res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
res.setHeader('Content-Disposition', `attachment; filename=${filename}`);
await workbook.xlsx.writeFile('statesampledata.xlsx');
res.send('done');
return workbook.xlsx.write(res).then(() => {
res.status(200).end();
});
} catch (error) {
throw new Error(error);
}
};