Iterate over a repeatable field to sum up a subfield

[brianmurphy]

I have a repeatable field for the parts needed to build my widget.

The parts repeatable has a cost subfield.

Outside of the repeatable field, I want to have a total_cost read-only field that updates when any of the cost subfields are changed.

I have viewed the javascript API FAQ but my javascript isn't strong enough to figure this out.

Here is the pseudo-code I have:

let sum = 0;
crud.field('parts').subfield('cost').onChange(function(field) {
foreach(cost as cost_subfield) {
sum += cost_subfield;
}
});
crud.field('total_cost').input.value = sum;

Now obviously that inner foreach on lines 3, 4 & 5 is wrong.

This is where I need help or a pointer to documentation on how to iterate through the subfields of a backpack repeatable field.

Thank you.

[pxpm]

Hey @brianmurphy

Maybe this example can help you on how to get all the subfields:

https://backpackforlaravel.com/docs/5.x/crud-fields-javascript-api#12-when-a-checkbox-is-checked-hide-repeatable-and-disable-all-s

Let me know if it doesn't 👍

Cheers

[jcastroa87]

Due to no activity, I will close this issue, but please feel free to re-open or create a new one if needed.

Cheers.