From 20a946d7f5256c077ddeacb9841aad7242e6ddea Mon Sep 17 00:00:00 2001
From: Akash Tom <me@akashtom.com>
Date: Mon, 23 Feb 2026 15:21:48 +0530
Subject: [PATCH] fix(linked documents): pass link specific fieldname to button
 so that only that field gets populated while creating a new doc

---
 frappe/model/meta.py                          | 16 ++++++++++++---
 frappe/public/js/frappe/form/dashboard.js     | 11 +++++++++-
 frappe/public/js/frappe/form/form.js          | 20 +++++++++++++------
 .../js/frappe/form/templates/form_links.html  |  4 +++-
 4 files changed, 40 insertions(+), 11 deletions(-)

diff --git a/frappe/model/meta.py b/frappe/model/meta.py
index 9e5624252d..add084d38e 100644
--- a/frappe/model/meta.py
+++ b/frappe/model/meta.py
@@ -793,11 +793,21 @@ class Meta(Document):
 						group.get("items").append(doctype)
 					link.added = True
 
+					# Add fieldname to transaction group for external links
+					if not link.is_child_table:
+						if "fieldnames" not in group:
+							group["fieldnames"] = {}
+						group["fieldnames"][link.link_doctype] = link.link_fieldname
+
 			if not link.added:
 				# group not found, make a new group
-				data.transactions.append(
-					dict(label=link.group, items=[link.parent_doctype or link.link_doctype])
-				)
+				new_group = dict(label=link.group, items=[link.parent_doctype or link.link_doctype])
+
+				# Add fieldname to new transaction group for external links
+				if not link.is_child_table:
+					new_group["fieldnames"] = {link.link_doctype: link.link_fieldname}
+
+				data.transactions.append(new_group)
 
 			if not data.fieldname and link.link_fieldname:
 				data.fieldname = link.link_fieldname
diff --git a/frappe/public/js/frappe/form/dashboard.js b/frappe/public/js/frappe/form/dashboard.js
index ddb8ba2e02..7687a55c9b 100644
--- a/frappe/public/js/frappe/form/dashboard.js
+++ b/frappe/public/js/frappe/form/dashboard.js
@@ -270,6 +270,13 @@ frappe.ui.form.Dashboard = class FormDashboard {
 					if (d.label == group.label) {
 						group_added.push(d.label);
 						group.items.push(...d.items);
+
+						if (d.fieldnames) {
+							if (!group.fieldnames) {
+								group.fieldnames = {};
+							}
+							Object.assign(group.fieldnames, d.fieldnames);
+						}
 					}
 				});
 			});
@@ -335,7 +342,9 @@ frappe.ui.form.Dashboard = class FormDashboard {
 
 		// bind new
 		transactions_area_body.find(".btn-new").on("click", function () {
-			me.frm.make_new($(this).attr("data-doctype"));
+			const doctype = $(this).attr("data-doctype");
+			const fieldname = $(this).attr("data-fieldname");
+			me.frm.make_new(doctype, fieldname);
 		});
 
 		this.data_rendered = true;
diff --git a/frappe/public/js/frappe/form/form.js b/frappe/public/js/frappe/form/form.js
index cefd7e1527..d77ffb2236 100644
--- a/frappe/public/js/frappe/form/form.js
+++ b/frappe/public/js/frappe/form/form.js
@@ -2007,7 +2007,7 @@ frappe.ui.form.Form = class FrappeForm {
 		}
 	}
 
-	make_new(doctype) {
+	make_new(doctype, fieldname) {
 		// make new doctype from the current form
 		// will handover to `make_methods` if defined
 		// or will create and match link fields
@@ -2021,7 +2021,7 @@ frappe.ui.form.Form = class FrappeForm {
 				let new_doc = frappe.model.get_new_doc(doctype, null, null, true);
 
 				// set link fields (if found)
-				me.set_link_field(doctype, new_doc);
+				me.set_link_field(doctype, new_doc, fieldname);
 
 				frappe.ui.form.make_quick_entry(doctype, null, null, new_doc);
 				// frappe.set_route('Form', doctype, new_doc.name);
@@ -2029,16 +2029,24 @@ frappe.ui.form.Form = class FrappeForm {
 		}
 	}
 
-	set_link_field(doctype, new_doc) {
+	set_link_field(doctype, new_doc, fieldname) {
 		let me = this;
 		frappe.get_meta(doctype).fields.forEach(function (df) {
-			if (df.fieldtype === "Link" && df.options === me.doctype) {
+			const isLinkToParent = df.fieldtype === "Link" && df.options === me.doctype;
+
+			if (fieldname) {
+				if (df.fieldname === fieldname && isLinkToParent) {
+					new_doc[df.fieldname] = me.doc.name;
+				}
+				return;
+			}
+
+			if (isLinkToParent) {
 				new_doc[df.fieldname] = me.doc.name;
 			} else if (["Link", "Dynamic Link"].includes(df.fieldtype) && me.doc[df.fieldname]) {
 				new_doc[df.fieldname] = me.doc[df.fieldname];
 			} else if (df.fieldtype === "Table" && df.options && df.reqd) {
-				let row = new_doc[df.fieldname][0];
-				me.set_link_field(df.options, row);
+				me.set_link_field(df.options, new_doc[df.fieldname][0]);
 			}
 		});
 	}
diff --git a/frappe/public/js/frappe/form/templates/form_links.html b/frappe/public/js/frappe/form/templates/form_links.html
index ed6256eaf0..c09709d6cb 100644
--- a/frappe/public/js/frappe/form/templates/form_links.html
+++ b/frappe/public/js/frappe/form/templates/form_links.html
@@ -9,6 +9,7 @@
 				</div>
 				{% for (let j=0; j < transactions[i].items.length; j++) { %}
 					{% let doctype = transactions[i].items[j]; %}
+					{% let fieldname = (transactions[i].fieldnames && transactions[i].fieldnames[doctype]) || transactions[i].fieldname; %}
 					<div class="document-link" data-doctype="{{ doctype }}">
 						<div class="document-link-badge" data-doctype="{{ doctype }}">
 							<a class="badge-link">{{ __(doctype) }}</a>
@@ -19,7 +20,8 @@
 						</span>
 						{% if !internal_links[doctype] %}
 							<button class="btn btn-new btn-secondary btn-xs icon-btn hidden"
-								data-doctype="{{ doctype }}">
+								data-doctype="{{ doctype }}"
+								data-fieldname="{{ fieldname }}">
 								<svg class="icon icon-sm"><use href="#icon-add"></use></svg>
 							</button>
 						{% endif %}