Create script.js

This Business Rule runs 'before' a record is deleted from the 'sn_compliance_policy' table.
 
Its purpose is to prevent a policy from being deleted if it is currently linked to any active controls.

This helps maintain data integrity and prevents the creation of orphaned or invalidated compliance records.

Author: trimbakeshmadhan-109

Server-Side Components/Business Rules/Prevent Deletion of Policy with Active Controls/script.js

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+(function executeRule(current, previous /*null when async*/ ) {
+    // This Business Rule runs 'before' a record is deleted from the 'sn_compliance_policy' table.
+    // Its purpose is to prevent a policy from being deleted if it is currently linked to any active controls.
+    // This helps maintain data integrity and prevents the creation of orphaned or invalidated compliance records.
+
+ 
+    // 'sn_compliance_m2m_policy_policy_statement'. This table links policies (via the 'document' field)
+    // to control statements (via the 'content' field). Using GlideAggregate is more
+    // performant than GlideRecord for counting records, as it performs the aggregation
+    // directly in the database.
+    var grControlAggregate = new GlideAggregate('sn_compliance_m2m_policy_policy_statement');
+    
+    // Add a query to filter for records in the m2m table where the 'document' field matches
+    // the sys_id of the policy record currently being deleted.
+    grControlAggregate.addQuery('document', current.getUniqueValue());
+    
+    // Add a second query using 'dot-walking' to filter for records where the related
+    // control statement ('content' field) is currently active. This ensures only active
+    // controls are considered.
+    grControlAggregate.addQuery('content.active', true);
+    
+    // Set the aggregate function to COUNT. This tells the database to return the total
+    // number of records that match the query conditions.
+    grControlAggregate.addAggregate('COUNT');
+    
+    // Execute the database query.
+    grControlAggregate.query();
+
+    // Initialize a variable to store the count of active controls.
+    var activeControlCount = 0;
+    
+    // Check if the query returned any results. If it did, retrieve the count.
+    // Note: GlideAggregate.next() returns a row even if the count is zero.
+    if (grControlAggregate.next()) {
+        // Retrieve the aggregated count result and assign it to the variable.
+        activeControlCount = grControlAggregate.getAggregate('COUNT');
+    }
+
+    // Check if the count of active controls is greater than zero.
+    if (activeControlCount > 0) {
+        // If active controls were found, add an error message to display to the user.
+        // The message includes the count for better clarity.
+        gs.addErrorMessage('Cannot delete this policy because it has ' + activeControlCount + ' active controls linked to it.');
+        
+        // This crucial line aborts the current database transaction (the delete operation).
+        // It prevents the policy record from being deleted.
+        current.setAbortAction(true);
+    }
+
+})(current, previous);