Field Validation based on Form View in Server Side (#2566)

* Create README.md

* Create fieldValidationinBR.js

* README.md

Author: prudvi-sai-posetty

Server-Side Components/Business Rules/Field Validation based on form view in Server side/README.md

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+ServiceNow business rule for server-side field validation based on form views.
+
+This ServiceNow business rule provides comprehensive server-side validation for multiple form fields when users access specific form views. The script ensures data integrity by validating that critical fields contain expected values before allowing record submission, making it perfect for enforcing business rules and data consistency across your ServiceNow instance.
+
+What This Script Does:
+
+The business rule automatically validates multiple fields against predefined expected values when a specific form view is accessed. Key features include:
+
+View-Based Validation: Only triggers when accessing a specified form view
+Multiple Field Support: Validates multiple fields simultaneously with customizable criteria
+Required Field Checking: Ensures mandatory fields are not empty or null
+Value Validation: Confirms fields contain expected values according to business rules
+User-Friendly Messaging: Provides clear, consolidated error messages explaining all validation failures
+Server-Side Security: Performs validation on the server to prevent client-side bypassing

Server-Side Components/Business Rules/Field Validation based on form view in Server side/fieldValidationinBR.js

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+(function executeRule(current, previous /*null when async*/ ) {
+    var TARGET_VIEW_NAME = 'your_target_view_name';
+    var FIELD_VALIDATIONS = [
+        {field: 'field1', expectedValue: 'value1', errorMsg: 'Field 1 validation failed'},
+        {field: 'field2', expectedValue: 'value2', errorMsg: 'Field 2 validation failed'},
+        {field: 'field3', expectedValue: 'value3', errorMsg: 'Field 3 validation failed'}
+    ];
+    
+    var gURI = "";
+    try {
+        gURI = gs.action.getGlideURI();
+    } catch(e) {
+        return;
+    }
+    
+    var view_name = gURI.get('sysparm_view');
+    
+    if (view_name == TARGET_VIEW_NAME) {
+        var validationErrors = [];
+        
+        for (var i = 0; i < FIELD_VALIDATIONS.length; i++) {
+            var validation = FIELD_VALIDATIONS[i];
+            var fieldValue = current.getValue(validation.field);
+            
+            if (gs.nil(fieldValue)) {
+                validationErrors.push(validation.field + ' is required');
+                continue;
+            }
+            
+            if (fieldValue != validation.expectedValue) {
+                validationErrors.push(validation.errorMsg);
+            }
+        }
+        
+        if (validationErrors.length > 0) {
+            gs.addErrorMessage(gs.getMessage("Validation failed: {0}", validationErrors.join(', ')));
+        }
+    }
+})(current, previous);