brotherton-erpnext/buying/utils.py
2013-11-20 13:14:12 +05:30

203 lines
6.8 KiB
Python

# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd.
# License: GNU General Public License v3. See license.txt
from __future__ import unicode_literals
import webnotes
from webnotes import msgprint, _
from webnotes.utils import getdate, flt, add_days, cstr
import json
@webnotes.whitelist()
def get_item_details(args):
"""
args = {
"doctype": "",
"docname": "",
"item_code": "",
"warehouse": None,
"supplier": None,
"transaction_date": None,
"conversion_rate": 1.0,
"buying_price_list": None,
"price_list_currency": None,
"plc_conversion_rate": 1.0,
"is_subcontracted": "Yes" / "No"
}
"""
if isinstance(args, basestring):
args = json.loads(args)
args = webnotes._dict(args)
item_bean = webnotes.bean("Item", args.item_code)
item = item_bean.doc
_validate_item_details(args, item)
out = _get_basic_details(args, item_bean)
out.supplier_part_no = _get_supplier_part_no(args, item_bean)
if not out.warehouse:
out.warehouse = item_bean.doc.default_warehouse
if out.warehouse:
out.projected_qty = get_projected_qty(item.name, out.warehouse)
if args.transaction_date and item.lead_time_days:
out.schedule_date = out.lead_time_date = add_days(args.transaction_date,
item.lead_time_days)
meta = webnotes.get_doctype(args.doctype)
if meta.get_field("currency"):
out.purchase_ref_rate = out.discount_rate = out.purchase_rate = \
out.import_ref_rate = out.import_rate = 0.0
out.update(_get_price_list_rate(args, item_bean, meta))
if args.doctype == "Material Request":
out.min_order_qty = flt(item.min_order_qty)
return out
def _get_basic_details(args, item_bean):
item = item_bean.doc
out = webnotes._dict({
"description": item.description_html or item.description,
"qty": 1.0,
"uom": item.stock_uom,
"conversion_factor": 1.0,
"warehouse": args.warehouse or item.default_warehouse,
"item_tax_rate": json.dumps(dict(([d.tax_type, d.tax_rate] for d in
item_bean.doclist.get({"parentfield": "item_tax"})))),
"batch_no": None,
"expense_head": item.purchase_account \
or webnotes.conn.get_value("Company", args.company, "default_expense_account"),
"cost_center": item.cost_center
})
for fieldname in ("item_name", "item_group", "brand", "stock_uom"):
out[fieldname] = item.fields.get(fieldname)
return out
def _get_price_list_rate(args, item_bean, meta):
from utilities.transaction_base import validate_currency
item = item_bean.doc
out = webnotes._dict()
# try fetching from price list
if args.buying_price_list and args.price_list_currency:
price_list_rate = webnotes.conn.sql("""select ref_rate from `tabItem Price`
where price_list=%s and item_code=%s and buying_or_selling='Buying'""",
(args.buying_price_list, args.item_code), as_dict=1)
if price_list_rate:
validate_currency(args, item_bean.doc, meta)
out.import_ref_rate = flt(price_list_rate[0].ref_rate) * \
flt(args.plc_conversion_rate) / flt(args.conversion_rate)
# if not found, fetch from last purchase transaction
if not out.import_ref_rate:
last_purchase = get_last_purchase_details(item.name, args.docname, args.conversion_rate)
if last_purchase:
out.update(last_purchase)
if out.import_ref_rate or out.import_rate:
validate_currency(args, item, meta)
return out
def _get_supplier_part_no(args, item_bean):
item_supplier = item_bean.doclist.get({"parentfield": "item_supplier_details",
"supplier": args.supplier})
return item_supplier and item_supplier[0].supplier_part_no or None
def _validate_item_details(args, item):
from utilities.transaction_base import validate_item_fetch
validate_item_fetch(args, item)
# validate if purchase item or subcontracted item
if item.is_purchase_item != "Yes":
msgprint(_("Item") + (" %s: " % item.name) + _("not a purchase item"),
raise_exception=True)
if args.is_subcontracted == "Yes" and item.is_sub_contracted_item != "Yes":
msgprint(_("Item") + (" %s: " % item.name) +
_("not a sub-contracted item.") +
_("Please select a sub-contracted item or do not sub-contract the transaction."),
raise_exception=True)
def get_last_purchase_details(item_code, doc_name=None, conversion_rate=1.0):
"""returns last purchase details in stock uom"""
# get last purchase order item details
last_purchase_order = webnotes.conn.sql("""\
select po.name, po.transaction_date, po.conversion_rate,
po_item.conversion_factor, po_item.purchase_ref_rate,
po_item.discount_rate, po_item.purchase_rate
from `tabPurchase Order` po, `tabPurchase Order Item` po_item
where po.docstatus = 1 and po_item.item_code = %s and po.name != %s and
po.name = po_item.parent
order by po.transaction_date desc, po.name desc
limit 1""", (item_code, cstr(doc_name)), as_dict=1)
# get last purchase receipt item details
last_purchase_receipt = webnotes.conn.sql("""\
select pr.name, pr.posting_date, pr.posting_time, pr.conversion_rate,
pr_item.conversion_factor, pr_item.purchase_ref_rate, pr_item.discount_rate,
pr_item.purchase_rate
from `tabPurchase Receipt` pr, `tabPurchase Receipt Item` pr_item
where pr.docstatus = 1 and pr_item.item_code = %s and pr.name != %s and
pr.name = pr_item.parent
order by pr.posting_date desc, pr.posting_time desc, pr.name desc
limit 1""", (item_code, cstr(doc_name)), as_dict=1)
purchase_order_date = getdate(last_purchase_order and last_purchase_order[0].transaction_date \
or "1900-01-01")
purchase_receipt_date = getdate(last_purchase_receipt and \
last_purchase_receipt[0].posting_date or "1900-01-01")
if (purchase_order_date > purchase_receipt_date) or \
(last_purchase_order and not last_purchase_receipt):
# use purchase order
last_purchase = last_purchase_order[0]
purchase_date = purchase_order_date
elif (purchase_receipt_date > purchase_order_date) or \
(last_purchase_receipt and not last_purchase_order):
# use purchase receipt
last_purchase = last_purchase_receipt[0]
purchase_date = purchase_receipt_date
else:
return webnotes._dict()
conversion_factor = flt(last_purchase.conversion_factor)
out = webnotes._dict({
"purchase_ref_rate": flt(last_purchase.purchase_ref_rate) / conversion_factor,
"purchase_rate": flt(last_purchase.purchase_rate) / conversion_factor,
"discount_rate": flt(last_purchase.discount_rate),
"purchase_date": purchase_date
})
conversion_rate = flt(conversion_rate) or 1.0
out.update({
"import_ref_rate": out.purchase_ref_rate / conversion_rate,
"import_rate": out.purchase_rate / conversion_rate,
"rate": out.purchase_rate
})
return out
@webnotes.whitelist()
def get_conversion_factor(item_code, uom):
return {"conversion_factor": webnotes.conn.get_value("UOM Conversion Detail",
{"parent": item_code, "uom": uom}, "conversion_factor")}
@webnotes.whitelist()
def get_projected_qty(item_code, warehouse):
return webnotes.conn.get_value("Bin", {"item_code": item_code,
"warehouse": warehouse}, "projected_qty")