Recursive GlideRecord Fetcher

Server-Side Components/Script Includes/Recursive GlideRecord Fetcher/README.md

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+#  Recursive GlideRecord Fetcher
+##  Overview
+This snippet provides a reusable logic to recursively fetch child records from a parent record in ServiceNow. It is useful for traversing hierarchical relationships such as tasks, categories, CMDB CI relationships, or any table with a parent-child structure.
+
+The logic prevents infinite loops by tracking visited records and supports nesting of children for structured output.
+
+---
+
+##  Use Case
+- Fetch all subtasks under a parent task.
+- Traverse CMDB CI relationships recursively.
+- Build hierarchical views of organizational units or categories.
+
+---
+
+##  Parameters
+| Parameter        | Description                                                                 |
+|------------------|-----------------------------------------------------------------------------|
+| `tableName`      | Name of the table to query (e.g., `task`, `cmdb_ci`, `custom_table`)        |
+| `parentField`    | Field that links to the parent record (e.g., `parent`, `parent_id`)         |
+| `parentSysId`    | Sys ID of the root parent record to start traversal                         |
+
+---
+
+##  Example Usage
+```javascript
+var fetcher = new RecursiveFetcher('task', 'parent');
+var hierarchy = fetcher.fetchChildren('abc123sysid'); // Replace with actual parent sys_id
+gs.info(JSON.stringify(hierarchy));

Server-Side Components/Script Includes/Recursive GlideRecord Fetcher/code.js

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+var RecursiveFetcher = Class.create();
+RecursiveFetcher.prototype = {
+    initialize: function(tableName, parentField) {
+        this.tableName = tableName;
+        this.parentField = parentField;
+        this.visited = [];
+    },
+
+    fetchChildren: function(parentSysId) {
+        if (this.visited.indexOf(parentSysId) !== -1) {
+            // Avoid infinite loops
+            return [];
+        }
+
+        this.visited.push(parentSysId);
+        var children = [];
+
+        var gr = new GlideRecord(this.tableName);
+        gr.addQuery(this.parentField, parentSysId);
+        gr.query();
+
+        while (gr.next()) {
+            var child = {
+                sys_id: gr.getValue('sys_id'),
+                name: gr.getDisplayValue('name') || gr.getDisplayValue('short_description'),
+                children: this.fetchChildren(gr.getValue('sys_id')) // Recursive call
+            };
+            children.push(child);
+        }
+
+        return children;
+    },
+
+    type: 'RecursiveFetcher'
+};
+
+// Example usage:
+//var fetcher = new RecursiveFetcher('task', 'parent');
+//var hierarchy = fetcher.fetchChildren('abc123sysid'); // Replace with actual parent sys_id
+//gs.info(JSON.stringify(hierarchy));
+``