How to add row in google sheet synchronously? - node.js

Question

I'm using google-spreadsheet library to access and insert data to Google Sheets. I was able to add multiple rows but each row is being added in no particular order, I guess due to the addRow() async behavior.
Example data is:
let myData = [{id: "1", fname: "John"}, {id: "2", fname: "Matt"}, {id: "3", fname: "Paul"}]
for (let i = 0; i < myData.length; i++) {
let row = myData[i];
// Async call to insert row.
doc.addRow(sheetIndex, row, (err) => {
if (err) throw err;
});
}
For-loop iterates and passes each row object to addRow() but it doesn't care what the order is when each row gets inserted to Googlesheets.
I've tried doing an async-await approach to wait for doc.addRow() before it iterates to next row object but I have no luck. Is there a way to achieve the insertion in the same order I pass it? Thanks in advance! :)

Answer 1

You couldn't await the function probably because it does't return Promise. So, lets promisify that function first.
function asyncAddRow(sheetIndex, row) {
return new Promise((res, rej) => {
doc.addRow(sheetIndex, row, (err) => {
if (err) rej(err);
else res(true);
});
})
}
Now, instead of calling doc.addRow you call our asyncAddRow. Since it returns a promise so you can await it now. Like this:
for (let i = 0; i < myData.length; i++) {
let row = myData[i];
await asyncAddRow(sheetIndex, row);
}

Answer 2

You should use the method append()
let values = [
[
// Cell values ...
],
// Additional rows ...
];
let resource = {
values,
};
this.sheetsService.spreadsheets.values.append({
spreadsheetId,
range,
valueInputOption,
resource,
}, (err, result) => {
if (err) {
// Handle error.
console.log(err);
} else {
console.log(`${result.updates.updatedCells} cells appended.`);
}
});
More info there