topic Re: Arcade Expression for Barcode Scanning Verification in ArcGIS Field Maps Questions

Arcade Expression for Barcode Scanning Verification

RangerofGIS — Wed, 18 Jun 2025 01:35:20 GMT

Hello,

I'm trying to get the following arcade expression to work. Essentially the app is designed to scan bins, however sometimes the wrong bin gets scanned so I'm trying to implement a validation check so that only certain bin prefixes are allowed to be scanned and submitting but I'm getting the following message when I use this expression

boolean: false

the console also throws out

Failed: Empty or non-text

Result: false

// barcode variable from feature attribute
var barcodeValue = 'BTR7981006';
Console('Barcode Value: ' + barcodeValue);

// Define valid prefixes for Bin
var validPrefixes = [
'BTR75', 'BTR76', 'BTR780', 'BTR781', 'BTR7820', 'BTR7821', 'BTR7831',
'BTR7846', 'BTR7847', 'BTR7848', 'BTR7855', 'BTR7866', 'BTR789', 'BTR790',
'BTR792', 'BTR798'
];

var isValid = false;

// Check if barcode is empty or not a text value
if (IsEmpty(barcodeValue) || TypeOf(barcodeValue) != 'Text') {
Console('Failed: Empty or non-text');
isValid = false;
}
// Check if barcode starts with BTR and is 10 characters long
else if (Left(barcodeValue, 3) != 'BTR' || Length(barcodeValue) != 10) {
Console('Failed: Invalid format, BTR=' + Left(barcodeValue, 3) + ', Length=' + Text(Length(barcodeValue)));
isValid = false;
}
// Check if barcode starts with any valid prefix
else {
for (var prefixIndex in validPrefixes) {
var currentPrefix = validPrefixes[prefixIndex];
if (Left(barcodeValue, Length(currentPrefix)) == currentPrefix) {
Console('Passed: Matched prefix ' + currentPrefix);
isValid = true;
break;
}
}
}

// Return validation result
Console('Result: ' + Text(isValid));
return isValid;

Re: Arcade Expression for Barcode Scanning Verification

KenBuja — Wed, 18 Jun 2025 12:30:47 GMT

There are a few things that need to be fixed in your code.

The TypeOf documentation seems to be incorrect. It returns "String" instead of "Text" for text. (line 15)
Use "Count" instead of "Length" to return the length of a string (lines 20, 21, and 28)

// barcode variable from feature attribute var barcodeValue = 'BTR7981006'; Console('Barcode Value: ' + barcodeValue); // Define valid prefixes for Bin var validPrefixes = [ 'BTR75', 'BTR76', 'BTR780', 'BTR781', 'BTR7820', 'BTR7821', 'BTR7831', 'BTR7846', 'BTR7847', 'BTR7848', 'BTR7855', 'BTR7866', 'BTR789', 'BTR790', 'BTR792', 'BTR798' ]; var isValid = false; // Check if barcode is empty or not a text value if (IsEmpty(barcodeValue) || TypeOf(barcodeValue) != 'String') { Console('Failed: Empty or non-text'); isValid = false; } // Check if barcode starts with BTR and is 10 characters long else if (Left(barcodeValue, 3) != 'BTR' || Count(barcodeValue) != 10) { Console('Failed: Invalid format, BTR=' + Left(barcodeValue, 3) + ', Length=' + Text(Count(barcodeValue))); isValid = false; } // Check if barcode starts with any valid prefix else { for (var prefixIndex in validPrefixes) { var currentPrefix = validPrefixes[prefixIndex]; if (Left(barcodeValue, Count(currentPrefix)) == currentPrefix) { Console('Passed: Matched prefix ' + currentPrefix); isValid = true; break; } } } // Return validation result Console('Result: ' + Text(isValid)); return isValid;

Re: Arcade Expression for Barcode Scanning Verification

RangerofGIS — Thu, 19 Jun 2025 04:15:54 GMT

Thank you so much! I was pulling my hair out wondering what was wrong.

I understand why you changed the script to string instead of text as text isnt truly an acceptable field type that ESRI uses.

However how did you also know length was not the right function to use?

Re: Arcade Expression for Barcode Scanning Verification

NathanDavis — Tue, 24 Jun 2025 18:11:47 GMT

Length function only accepts featureSet or Geometry arguments. Count can accept string arguments, among others.