brotherton-erpnext/erpnext/patches/v11_0/update_total_qty_field.py

49 lines
1.9 KiB
Python

from __future__ import unicode_literals
import frappe
def execute():
frappe.reload_doc('buying', 'doctype', 'purchase_order')
frappe.reload_doc('buying', 'doctype', 'supplier_quotation')
frappe.reload_doc('selling', 'doctype', 'sales_order')
frappe.reload_doc('selling', 'doctype', 'quotation')
frappe.reload_doc('stock', 'doctype', 'delivery_note')
frappe.reload_doc('stock', 'doctype', 'purchase_receipt')
frappe.reload_doc('accounts', 'doctype', 'sales_invoice')
frappe.reload_doc('accounts', 'doctype', 'purchase_invoice')
doctypes = ["Sales Order", "Sales Invoice", "Delivery Note",\
"Purchase Order", "Purchase Invoice", "Purchase Receipt", "Quotation", "Supplier Quotation"]
for doctype in doctypes:
total_qty = frappe.db.sql('''
SELECT
parent, SUM(qty) as qty
FROM
`tab{0} Item`
where parenttype = '{0}'
GROUP BY parent
'''.format(doctype), as_dict = True)
# Query to update total_qty might become too big, Update in batches
# batch_size is chosen arbitrarily, Don't try too hard to reason about it
batch_size = 100000
for i in range(0, len(total_qty), batch_size):
batch_transactions = total_qty[i:i + batch_size]
# UPDATE with CASE for some reason cannot use PRIMARY INDEX,
# causing all rows to be examined, leading to a very slow update
# UPDATE with WHERE clause uses PRIMARY INDEX, but will lead to too many queries
# INSERT with ON DUPLICATE KEY UPDATE uses PRIMARY INDEX
# and can perform multiple updates per query
# This is probably never used anywhere else as of now, but should be
values = []
for d in batch_transactions:
values.append("('{}', {})".format(frappe.db.escape(d.parent), d.qty))
conditions = ",".join(values)
frappe.db.sql("""
INSERT INTO `tab{}` (name, total_qty) VALUES {}
ON DUPLICATE KEY UPDATE name = VALUES(name), total_qty = VALUES(total_qty)
""".format(doctype, conditions))