Merge pull request #26159 from GangaManoj/asset-credit-note

diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 6d1f624..8889913 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -13,7 +13,7 @@
 from erpnext.stock.doctype.delivery_note.delivery_note import update_billed_amount_based_on_so
 from erpnext.projects.doctype.timesheet.timesheet import get_projectwise_timesheet_data
 from erpnext.assets.doctype.asset.depreciation \
-	import get_disposal_account_and_cost_center, get_gl_entries_on_asset_disposal
+	import get_disposal_account_and_cost_center, get_gl_entries_on_asset_disposal, get_gl_entries_on_asset_regain
 from erpnext.stock.doctype.batch.batch import set_batch_nos
 from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos, get_delivery_note_serial_no
 from erpnext.setup.doctype.company.company import update_company_current_month_sales
@@ -149,7 +149,7 @@
 					if self.update_stock:
 						frappe.throw(_("'Update Stock' cannot be checked for fixed asset sale"))
 
-					elif asset.status in ("Scrapped", "Cancelled", "Sold"):
+					elif asset.status in ("Scrapped", "Cancelled") or (asset.status == "Sold" and not self.is_return):
 						frappe.throw(_("Row #{0}: Asset {1} cannot be submitted, it is already {2}").format(d.idx, d.asset, asset.status))
 
 	def validate_item_cost_centers(self):
@@ -918,22 +918,33 @@
 		for item in self.get("items"):
 			if flt(item.base_net_amount, item.precision("base_net_amount")):
 				if item.is_fixed_asset:
-					asset = frappe.get_doc("Asset", item.asset)
-
+					if item.get('asset'):
+						asset = frappe.get_doc("Asset", item.asset)
+					else:
+						frappe.throw(_(
+							"Row #{0}: You must select an Asset for Item {1}.").format(item.idx, item.item_name), 
+							title=_("Missing Asset")
+						)
 					if (len(asset.finance_books) > 1 and not item.finance_book
 						and asset.finance_books[0].finance_book):
 						frappe.throw(_("Select finance book for the item {0} at row {1}")
 							.format(item.item_code, item.idx))
 
-					fixed_asset_gl_entries = get_gl_entries_on_asset_disposal(asset,
-						item.base_net_amount, item.finance_book)
+					if self.is_return:
+						fixed_asset_gl_entries = get_gl_entries_on_asset_regain(asset,
+							item.base_net_amount, item.finance_book)
+						asset.db_set("disposal_date", None)
+					else:
+						fixed_asset_gl_entries = get_gl_entries_on_asset_disposal(asset,
+							item.base_net_amount, item.finance_book)
+						asset.db_set("disposal_date", self.posting_date)
 
 					for gle in fixed_asset_gl_entries:
 						gle["against"] = self.customer
 						gl_entries.append(self.get_gl_dict(gle, item=item))
 
-					asset.db_set("disposal_date", self.posting_date)
-					asset.set_status("Sold" if self.docstatus==1 else None)
+					self.set_asset_status(asset)
+				
 				else:
 					# Do not book income for transfer within same company
 					if not self.is_internal_transfer():
@@ -959,6 +970,12 @@
 			erpnext.is_perpetual_inventory_enabled(self.company):
 			gl_entries += super(SalesInvoice, self).get_gl_entries()
 
+	def set_asset_status(self, asset):
+		if self.is_return:
+			asset.set_status()
+		else: 	
+			asset.set_status("Sold" if self.docstatus==1 else None)
+
 	def make_loyalty_point_redemption_gle(self, gl_entries):
 		if cint(self.redeem_loyalty_points):
 			gl_entries.append(
diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index fe531d3..c27a878 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -10,6 +10,7 @@
 from erpnext.stock.doctype.stock_entry.test_stock_entry import make_stock_entry, get_qty_after_transaction
 from erpnext.accounts.doctype.purchase_invoice.test_purchase_invoice import unlink_payment_on_cancel_of_invoice
 from erpnext.accounts.doctype.pos_profile.test_pos_profile import make_pos_profile
+from erpnext.assets.doctype.asset.test_asset import create_asset, create_asset_data
 from erpnext.exceptions import InvalidAccountCurrency, InvalidCurrency
 from erpnext.stock.doctype.serial_no.serial_no import SerialNoWarehouseError
 from frappe.model.naming import make_autoname
@@ -1069,6 +1070,36 @@
 		self.assertFalse(si1.outstanding_amount)
 		self.assertEqual(frappe.db.get_value("Sales Invoice", si.name, "outstanding_amount"), 1500)
 
+	def test_gle_made_when_asset_is_returned(self):
+		create_asset_data()
+		asset = create_asset(item_code="Macbook Pro")
+	
+		si = create_sales_invoice(item_code="Macbook Pro", asset=asset.name, qty=1, rate=90000)
+		return_si = create_sales_invoice(is_return=1, return_against=si.name, item_code="Macbook Pro", asset=asset.name, qty=-1, rate=90000)
+
+		disposal_account = frappe.get_cached_value("Company", "_Test Company", "disposal_account")
+
+		# Asset value is 100,000 but it was sold for 90,000, so there should be a loss of 10,000
+		loss_for_si = frappe.get_all(
+			"GL Entry", 
+			filters = {
+				"voucher_no": si.name,
+				"account": disposal_account
+			},
+			fields = ["credit", "debit"]
+		)[0]
+
+		loss_for_return_si = frappe.get_all(
+			"GL Entry", 
+			filters = {
+				"voucher_no": return_si.name,
+				"account": disposal_account
+			},
+			fields = ["credit", "debit"]
+		)[0]
+
+		self.assertEqual(loss_for_si['credit'], loss_for_return_si['debit'])
+		self.assertEqual(loss_for_si['debit'], loss_for_return_si['credit'])
 
 	def test_discount_on_net_total(self):
 		si = frappe.copy_doc(test_records[2])
@@ -2164,6 +2195,7 @@
 		"rate": args.rate if args.get("rate") is not None else 100,
 		"income_account": args.income_account or "Sales - _TC",
 		"expense_account": args.expense_account or "Cost of Goods Sold - _TC",
+		"asset": args.asset or None,
 		"cost_center": args.cost_center or "_Test Cost Center - _TC",
 		"serial_no": args.serial_no,
 		"conversion_factor": 1
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
index 8e6952a..6690bda 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.json
@@ -743,7 +743,6 @@
    "fieldname": "asset",
    "fieldtype": "Link",
    "label": "Asset",
-   "no_copy": 1,
    "options": "Asset"
   },
   {
@@ -826,7 +825,7 @@
  "idx": 1,
  "istable": 1,
  "links": [],
- "modified": "2021-02-23 01:05:22.123527",
+ "modified": "2021-06-21 23:03:11.599901",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice Item",
diff --git a/erpnext/assets/doctype/asset/depreciation.py b/erpnext/assets/doctype/asset/depreciation.py
index 8f0afb4..8fdbbf9 100644
--- a/erpnext/assets/doctype/asset/depreciation.py
+++ b/erpnext/assets/doctype/asset/depreciation.py
@@ -176,22 +176,34 @@
 
 	asset.set_status()
 
-@frappe.whitelist()
+def get_gl_entries_on_asset_regain(asset, selling_amount=0, finance_book=None):
+	fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation = \
+		get_asset_details(asset, finance_book)
+
+	gl_entries = [
+		{
+			"account": fixed_asset_account,
+			"debit_in_account_currency": asset.gross_purchase_amount,
+			"debit": asset.gross_purchase_amount,
+			"cost_center": depreciation_cost_center
+		},
+		{
+			"account": accumulated_depr_account,
+			"credit_in_account_currency": accumulated_depr_amount,
+			"credit": accumulated_depr_amount,
+			"cost_center": depreciation_cost_center
+		}
+	]
+
+	profit_amount = abs(flt(value_after_depreciation)) - abs(flt(selling_amount))
+	if profit_amount:
+		get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center)
+
+	return gl_entries
+
 def get_gl_entries_on_asset_disposal(asset, selling_amount=0, finance_book=None):
-	fixed_asset_account, accumulated_depr_account, depr_expense_account = get_depreciation_accounts(asset)
-	disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(asset.company)
-	depreciation_cost_center = asset.cost_center or depreciation_cost_center
-
-	idx = 1
-	if finance_book:
-		for d in asset.finance_books:
-			if d.finance_book == finance_book:
-				idx = d.idx
-				break
-
-	value_after_depreciation = (asset.finance_books[idx - 1].value_after_depreciation
-		if asset.calculate_depreciation else asset.value_after_depreciation)
-	accumulated_depr_amount = flt(asset.gross_purchase_amount) - flt(value_after_depreciation)
+	fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation = \
+		get_asset_details(asset, finance_book)
 
 	gl_entries = [
 		{
@@ -210,16 +222,37 @@
 
 	profit_amount = flt(selling_amount) - flt(value_after_depreciation)
 	if profit_amount:
-		debit_or_credit = "debit" if profit_amount < 0 else "credit"
-		gl_entries.append({
-			"account": disposal_account,
-			"cost_center": depreciation_cost_center,
-			debit_or_credit: abs(profit_amount),
-			debit_or_credit + "_in_account_currency": abs(profit_amount)
-		})
+		get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center)
 
 	return gl_entries
 
+def get_asset_details(asset, finance_book=None):
+	fixed_asset_account, accumulated_depr_account, depr_expense_account = get_depreciation_accounts(asset)
+	disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(asset.company)
+	depreciation_cost_center = asset.cost_center or depreciation_cost_center
+
+	idx = 1
+	if finance_book:
+		for d in asset.finance_books:
+			if d.finance_book == finance_book:
+				idx = d.idx
+				break
+
+	value_after_depreciation = (asset.finance_books[idx - 1].value_after_depreciation
+		if asset.calculate_depreciation else asset.value_after_depreciation)
+	accumulated_depr_amount = flt(asset.gross_purchase_amount) - flt(value_after_depreciation)
+
+	return fixed_asset_account, asset, depreciation_cost_center, accumulated_depr_account, accumulated_depr_amount, disposal_account, value_after_depreciation
+
+def get_profit_gl_entries(profit_amount, gl_entries, disposal_account, depreciation_cost_center):
+	debit_or_credit = "debit" if profit_amount < 0 else "credit"
+	gl_entries.append({
+		"account": disposal_account,
+		"cost_center": depreciation_cost_center,
+		debit_or_credit: abs(profit_amount),
+		debit_or_credit + "_in_account_currency": abs(profit_amount)
+	})
+
 @frappe.whitelist()
 def get_disposal_account_and_cost_center(company):
 	disposal_account, depreciation_cost_center = frappe.get_cached_value('Company',  company,
diff --git a/erpnext/stock/doctype/item/test_item.py b/erpnext/stock/doctype/item/test_item.py
index c7467a5..922049f 100644
--- a/erpnext/stock/doctype/item/test_item.py
+++ b/erpnext/stock/doctype/item/test_item.py
@@ -587,8 +587,8 @@
 test_records = frappe.get_test_records('Item')
 
 def create_item(item_code, is_stock_item=1, valuation_rate=0, warehouse="_Test Warehouse - _TC",
-		is_customer_provided_item=None, customer=None, is_purchase_item=None, opening_stock=0,
-		company="_Test Company"):
+		is_customer_provided_item=None, customer=None, is_purchase_item=None, opening_stock=0, is_fixed_asset=0,
+		asset_category=None, company="_Test Company"):
 	if not frappe.db.exists("Item", item_code):
 		item = frappe.new_doc("Item")
 		item.item_code = item_code
@@ -596,6 +596,8 @@
 		item.description = item_code
 		item.item_group = "All Item Groups"
 		item.is_stock_item = is_stock_item
+		item.is_fixed_asset = is_fixed_asset
+		item.asset_category = asset_category
 		item.opening_stock = opening_stock
 		item.valuation_rate = valuation_rate
 		item.is_purchase_item = is_purchase_item