ServiceNow Automatic Relationship Builder

Server-Side Components/Business Rules/Automatic Relationship Builder/README.md

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+# ServiceNow Automatic Relationship Builder  
+**Auto-create CMDB relationships dynamically on CI insert or update**
+
+---
+
+## Overview
+
+The **Automatic Relationship Builder** ensures that your CMDB stays complete and accurate by automatically creating parent–child relationships between Configuration Items (CIs) whenever they are inserted or updated.  
+
+Instead of manually linking servers, applications, and databases, this Business Rule dynamically establishes **"Runs on"**, **"Depends on"**, or **"Connected to"** relationships based on CI attributes.
+
+---
+
+## Key Highlights
+
+Builds CMDB relationships automatically  
+Eliminates manual linking of dependent CIs  
+
+---
+
+## Use Case
+
+When a new **Application CI** is created or discovered and its **host CI (server)** is known,  
+the script automatically builds a relationship of type **“Runs on::Runs”** between the two.
+
+This keeps your CMDB up-to-date without human intervention.
+
+---
+
+## Table and Trigger
+
+| Item | Value |
+|------|-------|
+| **Table** | `cmdb_ci_appl` |
+| **Trigger** | After Insert / After Update |
+| **Condition** | `u_host` field is populated |
+| **Purpose** | Create a “Runs on” relationship between host and application |
+
+---
+
+## Script — Business Rule
+
+
+Business Rule: Auto Relationship Builder
+Table: cmdb_ci_appl
+When: after insert / after update
+
+## Example Input (New CI Record)
+| Field  | Value                        |
+| ------ | ---------------------------- |
+| Name   | Payroll Application          |
+| Class  | Application (`cmdb_ci_appl`) |
+| u_Host | APP-SERVER-01                |
+| Owner  | IT Operations                |
+
+## Example Output (Created Relationship)
+
+| Field  | Value               |
+| ------ | ------------------- |
+| Parent | APP-SERVER-01       |
+| Child  | Payroll Application |
+| Type   | Runs on :: Runs     |
+| Table  | cmdb_rel_ci         |
+Relationship automatically visible in CI Relationship Viewer.
+
+

Server-Side Components/Business Rules/Automatic Relationship Builder/relationship.js

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+/* Scenario :
+When a new CI (like an Application Server) is discovered or updated, automatically create “Runs on”, “Depends on”, 
+or “Connected to” relationships based on specific patterns.*/
+
+// Table: cmdb_ci_appl | BR: after insert/update
+(function executeRule(current, previous) {
+    if (current.u_host) {
+        var rel = new GlideRecord('cmdb_rel_ci');
+        rel.initialize();
+        rel.parent = current.u_host;     // parent = server
+        rel.child = current.sys_id;      // child = application
+        rel.type = 'Runs on::Runs';      // relationship type
+        rel.insert();
+    }
+})(current, previous);