Catch an exception

Luck Kanthatham-2308338

I've converted an API end point with a precondition set to enforce that data is returned.  Now that this is a function, is it possible that the calling function can catch exception from the precondition in the function and do something with it?

sequence:
1.  main function calls the function
2. function fails based on the precondition and generates an exception
3. currently, the main function exits with the exception from step 2

I'd like to be able to catch the exception from step 2 and continue down the main function.

Luck Kanthatham-2308338

In general, if there's a way to do some kind of try/catch, it would be extremely useful.

Michael Udinski

Xano doesn't do try/catch but you should be able to accomplish the same thing with conditionals and preconditions

Luck Kanthatham-2308338

Thank you, Michael.

Ambroise

Wow, that's a big difference from traditional development.

Just experienced this after doing some basic check:

const { DateTime, Duration } = luxon; // See https://docs.xano.com/working-with-data/lambdas-javascript/libraries-and-functions#luxon

const { sunday, employeeId } = $input;
const date = DateTime.fromISO(sunday);

// If date isn't a sunday, stop the script
if (date.weekday !== 7) {
  throw new Error(`The provided date is not a Sunday "${sunday}". The provided date must be a Sunday but is a "${date.weekdayLong}", because the script will generate a Weekly Timesheet (7 days), starting by the week's Sunday.`);
}

But even when this script was failing, the rest of the actions was executed, not quite what I had expected!