Hi @Nishna,
If you want to make specific key read-only within Name-Value pairs so it is not possible through standard client-side APIs like g_form or UI Policies. The Name-Value pairs field is treated as a single unit, and these standard methods lack the granularity to interact with individual key-value pairs.
However, this can be accomplished using an onLoad client script that utilizes DOM (Document Object Model) manipulation. It's important to note that DOM manipulation is not a ServiceNow best practice as it can be unreliable and may break with future UI upgrades.
Here is a brief explanation and a sample script:
This approach involves inspecting the HTML structure of the Name-Value pairs field to target the specific input element for the desired key's value and then setting its disabled attribute.
function onLoad() {
// Specify the key for which the value should be read-only
var targetKey = "hosts";
// Function to find and disable the input for the target key
function disableValueByKey(key) {
try {
// Select all rows in the Name-Value pairs field
var nameValueRows = g_form.getControl('YOUR_FIELD_NAME').select('.name-value-row');
// Iterate through each row to find the target key
nameValueRows.forEach(function(row) {
var keyInput = row.querySelector('input[id$="_name"]');
if (keyInput && keyInput.value === key) {
var valueInput = row.querySelector('input[id$="_value"]');
if (valueInput) {
valueInput.disabled = true;
}
}
});
} catch (e) {
jslog('Error disabling Name-Value pair value: ' + e);
}
}
// A timeout is often necessary to ensure the field has rendered
setTimeout(function() {
disableValueByKey(targetKey);
}, 500);
}
Note: For more complex solutions where you need granular control over individual fields, consider using a Multi-Row Variable Set (for catalog items) or a related list with individual fields (for standard forms). These are more stable and supported methods for managing multiple sets of data.
Thanks & Regards,
Muhammad Iftikhar
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