fix(patch): Fetch missing gst hsn code in transactions and set hsn-wise taxes

erpnext/patches/v11_0/set_missing_gst_hsn_code.py

@@ -0,0 +1,43 @@
+import frappe
+from erpnext.controllers.taxes_and_totals import get_itemised_tax_breakup_html
+
+def execute():
+	company = frappe.db.sql_list("select name from tabCompany where country = 'India'")
+	if not company:
+		return
+
+	doctypes = ["Quotation", "Sales Order", "Delivery Note", "Sales Invoice",
+		"Supplier Quotation", "Purchase Order", "Purchase Receipt", "Purchase Invoice"]
+
+	for dt in doctypes:
+		date_field = "posting_date"
+		if dt in ["Quotation", "Sales Order", "Supplier Quotation", "Purchase Order"]:
+			date_field = "transaction_date"
+
+		transactions = frappe.db.sql("""
+			select dt.name, dt_item.name as child_name
+			from `tab{dt}` dt, `tab{dt} Item` dt_item
+			where dt.name = dt_item.parent
+				and dt.`{date_field}` > '2018-06-01'
+				and dt.docstatus = 1
+				and ifnull(dt_item.gst_hsn_code, '') = ''
+				and ifnull(dt_item.item_code, '') != ''
+				and dt.company in ({company})
+		""".format(dt=dt, date_field=date_field, company=", ".join(['%s']*len(company))), tuple(company), as_dict=1)
+
+		if not transactions:
+			continue
+
+		transaction_rows_name = [d.child_name for d in transactions]
+
+		frappe.db.sql("""
+			update `tab{dt} Item` dt_item
+			set dt_item.gst_hsn_code = (select gst_hsn_code from tabItem where name=dt_item.item_code)
+			where dt_item.name in ({rows_name})
+		""".format(dt=dt, rows_name=", ".join(['%s']*len(transaction_rows_name))), tuple(transaction_rows_name))
+
+		for t in transactions:
+			print(t.name)
+			trans_doc = frappe.get_doc(dt, t.name)
+			hsnwise_tax = get_itemised_tax_breakup_html(trans_doc)
+			frappe.db.set_value(dt, t.name, "other_charges_calculation", hsnwise_tax, update_modified=False)