From 4abe2e82a066326573644d0f641f9f1c400e38c4 Mon Sep 17 00:00:00 2001
From: khushi8112 <khushirawat23@navgurukul.org>
Date: Mon, 17 Nov 2025 14:35:27 +0530
Subject: [PATCH] fix(patch): migrate old Budget data to new structure

---
 erpnext/patches.txt                           |   2 +-
 ...rate_submitted_budgets_to_new_structure.py | 102 ++++++++++++++++++
 .../patches/v16_0/set_total_budget_amount.py  |  16 ---
 3 files changed, 103 insertions(+), 17 deletions(-)
 create mode 100644 erpnext/patches/v16_0/migrate_submitted_budgets_to_new_structure.py
 delete mode 100644 erpnext/patches/v16_0/set_total_budget_amount.py

diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index a894f8cb44a..7d3296fe327 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -448,4 +448,4 @@ erpnext.patches.v16_0.update_serial_batch_entries
 erpnext.patches.v16_0.set_company_wise_warehouses
 erpnext.patches.v16_0.set_valuation_method_on_companies
 erpnext.patches.v15_0.migrate_old_item_wise_tax_detail_data_to_table
-erpnext.patches.v16_0.set_total_budget_amount
+erpnext.patches.v16_0.migrate_submitted_budgets_to_new_structure
diff --git a/erpnext/patches/v16_0/migrate_submitted_budgets_to_new_structure.py b/erpnext/patches/v16_0/migrate_submitted_budgets_to_new_structure.py
new file mode 100644
index 00000000000..d803a852d3f
--- /dev/null
+++ b/erpnext/patches/v16_0/migrate_submitted_budgets_to_new_structure.py
@@ -0,0 +1,102 @@
+import frappe
+from frappe.utils import add_months, flt, get_first_day, get_last_day
+
+
+def execute():
+	submitted_budgets = frappe.get_all("Budget", filters={"docstatus": 1}, pluck="name")
+
+	for old_budget in submitted_budgets:
+		old_bud = frappe.get_doc("Budget", old_budget)
+
+		old_accounts = frappe.get_all(
+			"Budget Account",
+			filters={"parent": old_bud.name},
+			fields=["account", "budget_amount"],
+			order_by="idx asc",
+		)
+
+		if not old_accounts:
+			continue
+
+		old_distribution = []
+		if old_bud.monthly_distribution:
+			old_distribution = frappe.get_all(
+				"Monthly Distribution Percentage",
+				filters={"parent": old_bud.monthly_distribution},
+				fields=["percentage_allocation"],
+				order_by="idx asc",
+			)
+
+		if old_distribution:
+			percentage_list = [flt(d.percentage) for d in old_distribution]
+		else:
+			percentage_list = [100 / 12] * 12
+
+		fy = frappe.get_doc("Fiscal Year", old_bud.fiscal_year)
+		fy_start = fy.year_start_date
+		fy_end = fy.year_end_date
+
+		for acc in old_accounts:
+			new = frappe.new_doc("Budget")
+
+			new.company = old_bud.company
+			new.cost_center = old_bud.cost_center
+			new.project = old_bud.project
+			new.fiscal_year = fy.name
+
+			new.from_fiscal_year = fy.name
+			new.to_fiscal_year = fy.name
+			new.budget_start_date = fy_start
+			new.budget_end_date = fy_end
+
+			new.account = acc.account
+			new.budget_amount = flt(acc.budget_amount)
+			new.distribution_frequency = "Monthly"
+
+			new.distribute_equally = 1 if len(set(percentage_list)) == 1 else 0
+
+			fields_to_copy = [
+				"applicable_on_material_request",
+				"action_if_annual_budget_exceeded_on_mr",
+				"action_if_accumulated_monthly_budget_exceeded_on_mr",
+				"applicable_on_purchase_order",
+				"action_if_annual_budget_exceeded_on_po",
+				"action_if_accumulated_monthly_budget_exceeded_on_po",
+				"applicable_on_booking_actual_expenses",
+				"action_if_annual_budget_exceeded",
+				"action_if_accumulated_monthly_budget_exceeded",
+				"applicable_on_cumulative_expense",
+				"action_if_annual_exceeded_on_cumulative_expense",
+				"action_if_accumulated_monthly_exceeded_on_cumulative_expense",
+			]
+
+			for field in fields_to_copy:
+				if hasattr(old_bud, field):
+					new.set(field, old_bud.get(field))
+
+			start = fy_start
+			for percentage in percentage_list:
+				row_start = get_first_day(start)
+				row_end = get_last_day(start)
+
+				new.append(
+					"budget_distribution",
+					{
+						"start_date": row_start,
+						"end_date": row_end,
+						"percent": percentage,
+						"amount": new.budget_amount * percentage / 100,
+					},
+				)
+
+				start = add_months(start, 1)
+
+			new.flags.ignore_validate = True
+			new.flags.ignore_mandatory = True
+			new.flags.ignore_links = True
+			new.flags.ignore_permissions = True
+
+			new.insert(ignore_permissions=True, ignore_mandatory=True)
+			new.submit()
+
+		old_bud.cancel()
diff --git a/erpnext/patches/v16_0/set_total_budget_amount.py b/erpnext/patches/v16_0/set_total_budget_amount.py
deleted file mode 100644
index 163f0f17274..00000000000
--- a/erpnext/patches/v16_0/set_total_budget_amount.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import frappe
-
-
-def execute():
-	if frappe.db.has_column("Budget", "total_budget_amount"):
-		frappe.db.sql(
-			"""
-            UPDATE `tabBudget` b
-            SET b.total_budget_amount = (
-                SELECT SUM(ba.budget_amount)
-                FROM `tabBudget Account` ba
-                WHERE ba.parent = b.name
-            )
-            WHERE IFNULL(b.total_budget_amount, 0) = 0
-            """
-		)