Create br_derive_dependent_fields.js

Author: mandeepkaran

Core ServiceNow APIs/GlideElement/Smart Field Validation and Dependent Field Derivation Using getError() and setError()/br_derive_dependent_fields.js

@@ -0,0 +1,45 @@
+// Name: Derive Dependent Fields
+// Table: Incident
+// When: before insert or before update
+// Order: 200
+
+(function executeRule(current, previous /*null when async*/) {
+
+    // Only proceed if short_description changed or new record
+    if (!(current.operation() === 'insert' || current.short_description.changes())) {
+        return;
+    }
+
+    var errorMsg = current.short_description.getError();
+
+    if (errorMsg) {
+        gs.info('[BR:200 - Derive] Skipping field derivation due to prior error → ' + errorMsg);
+        return;
+    }
+
+    // Proceed only if no prior validation error
+    var desc = current.getValue('short_description').toLowerCase();
+
+    // Example 1: Derive category
+    if (desc.includes('server')) {
+        current.category = 'infrastructure';
+        current.subcategory = 'server issue';
+    } else if (desc.includes('email')) {
+        current.category = 'communication';
+        current.subcategory = 'email problem';
+    } else if (desc.includes('login')) {
+        current.category = 'access';
+        current.subcategory = 'authentication';
+    } else {
+        current.category = 'inquiry';
+        current.subcategory = 'general';
+    }
+
+    // Example 2: Derive impact
+    if (desc.includes('critical') || desc.includes('outage')) {
+        current.impact = 1; // High
+    } else {
+        current.impact = 3; // Low
+    }
+
+})(current, previous);