feat: add Purchase Partner Target Variance Based On Item Group report

Mirrors the Sales Partner Target Variance Based On Item Group report
for the purchase flow. Calls the shared get_data_column helper with
"Purchase Partner" so it reads Target Details with parenttype=Purchase
Partner and matches against the purchase_partner field on PO/PI/PR.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

erpnext/buying/report/purchase_partner_target_variance_based_on_item_group/purchase_partner_target_variance_based_on_item_group.js

@@ -0,0 +1,60 @@
+// Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+// License: GNU General Public License v3. See license.txt
+
+frappe.query_reports["Purchase Partner Target Variance Based On Item Group"] = {
+	filters: [
+		{
+			fieldname: "company",
+			label: __("Company"),
+			fieldtype: "Link",
+			options: "Company",
+			default: frappe.defaults.get_user_default("Company"),
+		},
+		{
+			fieldname: "fiscal_year",
+			label: __("Fiscal Year"),
+			fieldtype: "Link",
+			options: "Fiscal Year",
+			default: erpnext.utils.get_fiscal_year(frappe.datetime.get_today()),
+		},
+		{
+			fieldname: "doctype",
+			label: __("Document Type"),
+			fieldtype: "Select",
+			options: "Purchase Order\nPurchase Receipt\nPurchase Invoice",
+			default: "Purchase Order",
+		},
+		{
+			fieldname: "period",
+			label: __("Period"),
+			fieldtype: "Select",
+			options: [
+				{ value: "Monthly", label: __("Monthly") },
+				{ value: "Quarterly", label: __("Quarterly") },
+				{ value: "Half-Yearly", label: __("Half-Yearly") },
+				{ value: "Yearly", label: __("Yearly") },
+			],
+			default: "Monthly",
+		},
+		{
+			fieldname: "target_on",
+			label: __("Target On"),
+			fieldtype: "Select",
+			options: "Quantity\nAmount",
+			default: "Quantity",
+		},
+	],
+	formatter: function (value, row, column, data, default_formatter) {
+		value = default_formatter(value, row, column, data);
+
+		if (column.fieldname.includes("variance")) {
+			if (data[column.fieldname] < 0) {
+				value = "<span style='color:red'>" + value + "</span>";
+			} else if (data[column.fieldname] > 0) {
+				value = "<span style='color:green'>" + value + "</span>";
+			}
+		}
+
+		return value;
+	},
+};

erpnext/buying/report/purchase_partner_target_variance_based_on_item_group/purchase_partner_target_variance_based_on_item_group.json

@@ -0,0 +1,33 @@
+{
+ "add_total_row": 0,
+ "creation": "2026-06-17 00:00:00",
+ "disable_prepared_report": 0,
+ "disabled": 0,
+ "docstatus": 0,
+ "doctype": "Report",
+ "idx": 0,
+ "is_standard": "Yes",
+ "modified": "2026-06-17 00:00:00",
+ "modified_by": "Administrator",
+ "module": "Buying",
+ "name": "Purchase Partner Target Variance Based On Item Group",
+ "owner": "Administrator",
+ "prepared_report": 0,
+ "ref_doctype": "Purchase Order",
+ "report_name": "Purchase Partner Target Variance Based On Item Group",
+ "report_type": "Script Report",
+ "roles": [
+  {
+   "role": "Purchase User"
+  },
+  {
+   "role": "Purchase Manager"
+  },
+  {
+   "role": "Accounts User"
+  },
+  {
+   "role": "Stock User"
+  }
+ ]
+}

erpnext/buying/report/purchase_partner_target_variance_based_on_item_group/purchase_partner_target_variance_based_on_item_group.py

@@ -0,0 +1,11 @@
+# Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+# License: GNU General Public License v3. See license.txt
+
+
+from erpnext.selling.report.sales_partner_target_variance_based_on_item_group.item_group_wise_sales_target_variance import (
+	get_data_column,
+)
+
+
+def execute(filters=None):
+	return get_data_column(filters, "Purchase Partner")

erpnext/buying/workspace/buying/buying.json

@@ -455,6 +455,17 @@
    "onboard": 0,
    "type": "Link"
   },
+  {
+   "dependencies": "Purchase Partner",
+   "hidden": 0,
+   "is_query_report": 1,
+   "label": "Purchase Partner Target Variance Based On Item Group",
+   "link_count": 0,
+   "link_to": "Purchase Partner Target Variance Based On Item Group",
+   "link_type": "Report",
+   "onboard": 0,
+   "type": "Link"
+  },
   {
    "hidden": 0,
    "is_query_report": 0,
@@ -637,7 +648,7 @@
    "type": "Link"
   }
  ],
- "modified": "2026-06-17 13:01:33.296280",
+ "modified": "2026-06-17 13:13:38.489837",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Buying",