Is there a way to insert a row number while mapping an object array?

[wcl3y2]

I am creating an integration that will take JSON from our CRM and create invoices in our ERP. One of the required fields is line number for each of the invoice lines. I am trying to generate this in the mapper snap, and I cannot figure out a way. I am really hoping that I don’t have to resort to using a script.

[tstack · Accepted solution]

wcl3y2:

One of the required fields is line number for each of the invoice lines. I am trying to generate this in the mapper snap, and I cannot figure out a way

I think you can use the .map() method on Array objects to do this since the callback will be passed the current index into the array. The following expression does this:

$lines.map((elem, index) => { lineNumber: index + 1, ...elem })

The .map() method will iterate over each element in the $lines array and execute the given callback function (the part that starts with (elem, index) =>. The callback function creates a new object with the new lineNumber property and then uses the spread operator (...elem) to add in the properties from the original array element.

Here’s a pipeline that demonstrates this:

Community7085_2020_03_16.slp (3.6 KB)

[wcl3y2]

That did the trick. Thank you!