How to know when on last page of query

So I’ve written a wrapper for this library that I’ve been using for more than a year but need to add a method for fetching all records together

Heres what I have

let getAllDataFromTable = (table) => (filterQuery = {}) => {
  return new Promise((resolve, reject) => {
    let data = [];
    table.select(filterQuery)
     
    .eachPage((records, fetchNextPage) => {
      data = data.concat(records);
      fetchNextPage();
    });
  });
}

I’m not sure when to call resolve(data) because there’s no way for me to know when on the last page. How come fetchNextPage() doesn’t return anything or have a 3rd parameter to know when on the last page?

The documentation shows that page will be called or done will be called, is there any way to know what’s about to be called?

[kasrak]

You’re right! Didn’t know that about the Promise spec, thanks.

[eorroe]

Whoa thanks

But I also found the solution, I didn’t realize that the second function was called when finished.

function done (error) {
 if (error) reject({ error });
 resolve(data);
}

The if (err) part confused me and made me think that it was an error handler method