fix: update delivery date in line items (#53331)

erpnext/buying/doctype/purchase_order/purchase_order.js

@@ -769,10 +769,6 @@ erpnext.buying.PurchaseOrderController = class PurchaseOrderController extends (
 	items_on_form_rendered() {
 		set_schedule_date(this.frm);
 	}
-
-	schedule_date() {
-		set_schedule_date(this.frm);
-	}
 };
 
 // for backward compatibility: combine new and previous states

erpnext/public/js/controllers/buying.js

@@ -140,6 +140,7 @@ erpnext.buying = {
 
 				this.toggle_subcontracting_fields();
 				super.refresh();
+				this.prevent_past_schedule_dates(this.frm);
 			}
 
 			toggle_subcontracting_fields() {
@@ -183,6 +184,28 @@ erpnext.buying = {
 				erpnext.utils.set_letter_head(this.frm)
 			}
 
+			schedule_date(doc, cdt, cdn) {
+				if (doc.schedule_date && !cdt.endsWith(" Item")) {
+					doc.items.forEach((d) => {
+						frappe.model.set_value(d.doctype, d.name, "schedule_date", doc.schedule_date);
+					});
+				}
+			}
+
+			transaction_date() {
+				super.transaction_date();
+				this.frm.set_value("schedule_date", "");
+				this.prevent_past_schedule_dates(this.frm);
+			}
+
+			prevent_past_schedule_dates(frm) {
+				if (frm.doc.transaction_date && frm.fields_dict["schedule_date"]) {
+					frm.fields_dict["schedule_date"].datepicker?.update({
+						minDate: new Date(frm.doc.transaction_date),
+					});
+				}
+			}
+
 			supplier_address() {
 				erpnext.utils.get_address_display(this.frm);
 				erpnext.utils.set_taxes_from_address(this.frm, "supplier_address", "supplier_address", "supplier_address");

erpnext/stock/doctype/material_request/material_request.js

@@ -642,10 +642,6 @@ erpnext.buying.MaterialRequestController = class MaterialRequestController exten
 		set_schedule_date(this.frm);
 	}
 
-	schedule_date() {
-		set_schedule_date(this.frm);
-	}
-
 	qty(doc, cdt, cdn) {
 		var row = frappe.get_doc(cdt, cdn);
 		row.amount = flt(row.qty) * flt(row.rate);