mirror of
https://github.com/frappe/erpnext.git
synced 2026-06-03 04:09:11 +00:00
stock reco and utility function of stocks
This commit is contained in:
Nabin Hait
@@ -32,6 +32,7 @@ class DocType:
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self.doclist = doclist
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def update_stock(self, args):
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from stock.stock_ledger import update_entries_after
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if not args.get("posting_date"):
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posting_date = nowdate()
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@@ -43,8 +44,13 @@ class DocType:
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if args.get("actual_qty"):
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# update valuation and qty after transaction for post dated entry
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self.update_entries_after(args.get("posting_date"), args.get("posting_time"))
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update_entries_after({
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item_code: self.doc.item_code,
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warehouse: self.doc.warehouse,
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posting_date: args.get("posting_date"),
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posting_time: args.get("posting_time")
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})
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def update_qty(self, args):
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# update the stock values (for current quantities)
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self.doc.actual_qty = flt(self.doc.actual_qty) + flt(args.get("actual_qty", 0))
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@@ -69,233 +75,110 @@ class DocType:
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""", (self.doc.item_code, self.doc.warehouse), as_dict=1)
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return sle and sle[0] or None
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def get_sle_prev_timebucket(self, posting_date = '1900-01-01', posting_time = '12:00'):
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"""get previous stock ledger entry before current time-bucket"""
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# get the last sle before the current time-bucket, so that all values
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# are reposted from the current time-bucket onwards.
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# this is necessary because at the time of cancellation, there may be
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# entries between the cancelled entries in the same time-bucket
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sle = sql("""
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select * from `tabStock Ledger Entry`
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where item_code = %s
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and warehouse = %s
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and ifnull(is_cancelled, 'No') = 'No'
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and timestamp(posting_date, posting_time) < timestamp(%s, %s)
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order by timestamp(posting_date, posting_time) desc, name desc
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limit 1
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""", (self.doc.item_code, self.doc.warehouse, posting_date, posting_time), as_dict=1)
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return sle and sle[0] or {}
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def validate_negative_stock(self, cqty, s):
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"""
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validate negative stock for entries current datetime onwards
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will not consider cancelled entries
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"""
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diff = cqty + s['actual_qty']
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if diff < 0 and (abs(diff) > 0.0001) and s['is_cancelled'] == 'No':
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self.exc_list.append({
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"diff": diff,
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"posting_date": s["posting_date"],
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"posting_time": s["posting_time"],
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"voucher_type": s["voucher_type"],
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"voucher_no": s["voucher_no"]
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})
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return True
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else:
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return False
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def get_serialized_inventory_values(self, val_rate, in_rate, opening_qty, \
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actual_qty, is_cancelled, serial_nos):
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"""
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get serialized inventory values
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"""
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if flt(in_rate) < 0: # wrong incoming rate
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in_rate = val_rate
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elif flt(in_rate) == 0 or flt(actual_qty) < 0:
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# In case of delivery/stock issue, get average purchase rate
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# of serial nos of current entry
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in_rate = flt(sql("""select ifnull(avg(purchase_rate), 0)
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from `tabSerial No` where name in (%s)""" % (serial_nos))[0][0])
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# def get_serialized_inventory_values(self, val_rate, in_rate, opening_qty, \
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# actual_qty, is_cancelled, serial_nos):
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# """
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# get serialized inventory values
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# """
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# if flt(in_rate) < 0: # wrong incoming rate
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# in_rate = val_rate
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# elif flt(in_rate) == 0 or flt(actual_qty) < 0:
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# # In case of delivery/stock issue, get average purchase rate
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# # of serial nos of current entry
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# in_rate = flt(sql("""select ifnull(avg(purchase_rate), 0)
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# from `tabSerial No` where name in (%s)""" % (serial_nos))[0][0])
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#
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# if in_rate and val_rate == 0: # First entry
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# val_rate = in_rate
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# # val_rate is same as previous entry if val_rate is negative
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# # Otherwise it will be calculated as per moving average
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# elif opening_qty + actual_qty > 0 and ((opening_qty * val_rate) + \
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# (actual_qty * in_rate)) > 0:
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# val_rate = ((opening_qty *val_rate) + (actual_qty * in_rate)) / \
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# (opening_qty + actual_qty)
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# return val_rate, in_rate
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#
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# def get_moving_average_inventory_values(self, val_rate, in_rate, opening_qty, actual_qty, is_cancelled):
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# if flt(in_rate) == 0 or flt(actual_qty) < 0:
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# # In case of delivery/stock issue in_rate = 0 or wrong incoming rate
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# in_rate = val_rate
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#
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# # val_rate is same as previous entry if :
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# # 1. actual qty is negative(delivery note / stock entry)
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# # 2. cancelled entry
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# # 3. val_rate is negative
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# # Otherwise it will be calculated as per moving average
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# if actual_qty > 0 and (opening_qty + actual_qty) > 0 and is_cancelled == 'No' \
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# and ((opening_qty * val_rate) + (actual_qty * in_rate)) > 0:
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# opening_qty = opening_qty > 0 and opening_qty or 0
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# val_rate = ((opening_qty *val_rate) + (actual_qty * in_rate)) / \
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# (opening_qty + actual_qty)
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# elif (opening_qty + actual_qty) <= 0:
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# val_rate = 0
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# return val_rate, in_rate
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#
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# def get_fifo_inventory_values(self, in_rate, actual_qty):
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# # add batch to fcfs balance
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# if actual_qty > 0:
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# self.fcfs_bal.append([flt(actual_qty), flt(in_rate)])
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#
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# # remove from fcfs balance
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# else:
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# incoming_cost = 0
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# withdraw = flt(abs(actual_qty))
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# while withdraw:
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# if not self.fcfs_bal:
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# break # nothing in store
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#
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# batch = self.fcfs_bal[0]
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#
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# if batch[0] <= withdraw:
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# # not enough or exactly same qty in current batch, clear batch
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# incoming_cost += flt(batch[1])*flt(batch[0])
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# withdraw -= batch[0]
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# self.fcfs_bal.pop(0)
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#
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#
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# else:
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# # all from current batch
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# incoming_cost += flt(batch[1])*flt(withdraw)
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# batch[0] -= withdraw
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# withdraw = 0
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#
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# in_rate = incoming_cost / flt(abs(actual_qty))
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#
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# fcfs_val = sum([flt(d[0])*flt(d[1]) for d in self.fcfs_bal])
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# fcfs_qty = sum([flt(d[0]) for d in self.fcfs_bal])
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# val_rate = fcfs_qty and fcfs_val / fcfs_qty or 0
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#
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# return val_rate, in_rate
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#
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# def get_valuation_rate(self, val_method, serial_nos, val_rate, in_rate, stock_val, cqty, s):
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# if serial_nos:
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# val_rate, in_rate = self.get_serialized_inventory_values( \
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# val_rate, in_rate, opening_qty = cqty, actual_qty = s['actual_qty'], \
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# is_cancelled = s['is_cancelled'], serial_nos = serial_nos)
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# elif val_method == 'Moving Average':
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# val_rate, in_rate = self.get_moving_average_inventory_values( \
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# val_rate, in_rate, opening_qty = cqty, actual_qty = s['actual_qty'], \
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# is_cancelled = s['is_cancelled'])
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# elif val_method == 'FIFO':
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# val_rate, in_rate = self.get_fifo_inventory_values(in_rate, \
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# actual_qty = s['actual_qty'])
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# return val_rate, in_rate
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if in_rate and val_rate == 0: # First entry
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val_rate = in_rate
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# val_rate is same as previous entry if val_rate is negative
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# Otherwise it will be calculated as per moving average
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elif opening_qty + actual_qty > 0 and ((opening_qty * val_rate) + \
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(actual_qty * in_rate)) > 0:
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val_rate = ((opening_qty *val_rate) + (actual_qty * in_rate)) / \
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(opening_qty + actual_qty)
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return val_rate, in_rate
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# def get_stock_value(self, val_method, cqty, val_rate, serial_nos):
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# if serial_nos:
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# stock_val = flt(val_rate) * flt(cqty)
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# elif val_method == 'Moving Average':
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# stock_val = flt(cqty) > 0 and flt(val_rate) * flt(cqty) or 0
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# elif val_method == 'FIFO':
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# stock_val = sum([flt(d[0])*flt(d[1]) for d in self.fcfs_bal])
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# return stock_val
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def get_moving_average_inventory_values(self, val_rate, in_rate, opening_qty, actual_qty, is_cancelled):
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if flt(in_rate) == 0 or flt(actual_qty) < 0:
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# In case of delivery/stock issue in_rate = 0 or wrong incoming rate
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in_rate = val_rate
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# val_rate is same as previous entry if :
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# 1. actual qty is negative(delivery note / stock entry)
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# 2. cancelled entry
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# 3. val_rate is negative
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# Otherwise it will be calculated as per moving average
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if actual_qty > 0 and (opening_qty + actual_qty) > 0 and is_cancelled == 'No' \
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and ((opening_qty * val_rate) + (actual_qty * in_rate)) > 0:
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opening_qty = opening_qty > 0 and opening_qty or 0
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val_rate = ((opening_qty *val_rate) + (actual_qty * in_rate)) / \
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(opening_qty + actual_qty)
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elif (opening_qty + actual_qty) <= 0:
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val_rate = 0
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return val_rate, in_rate
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def get_fifo_inventory_values(self, in_rate, actual_qty):
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# add batch to fcfs balance
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if actual_qty > 0:
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self.fcfs_bal.append([flt(actual_qty), flt(in_rate)])
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# remove from fcfs balance
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else:
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incoming_cost = 0
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withdraw = flt(abs(actual_qty))
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while withdraw:
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if not self.fcfs_bal:
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break # nothing in store
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batch = self.fcfs_bal[0]
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if batch[0] <= withdraw:
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# not enough or exactly same qty in current batch, clear batch
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incoming_cost += flt(batch[1])*flt(batch[0])
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withdraw -= batch[0]
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self.fcfs_bal.pop(0)
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else:
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# all from current batch
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incoming_cost += flt(batch[1])*flt(withdraw)
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batch[0] -= withdraw
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withdraw = 0
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in_rate = incoming_cost / flt(abs(actual_qty))
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fcfs_val = sum([flt(d[0])*flt(d[1]) for d in self.fcfs_bal])
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fcfs_qty = sum([flt(d[0]) for d in self.fcfs_bal])
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val_rate = fcfs_qty and fcfs_val / fcfs_qty or 0
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return val_rate, in_rate
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def get_valuation_rate(self, val_method, serial_nos, val_rate, in_rate, stock_val, cqty, s):
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if serial_nos:
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val_rate, in_rate = self.get_serialized_inventory_values( \
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val_rate, in_rate, opening_qty = cqty, actual_qty = s['actual_qty'], \
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is_cancelled = s['is_cancelled'], serial_nos = serial_nos)
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elif val_method == 'Moving Average':
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val_rate, in_rate = self.get_moving_average_inventory_values( \
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val_rate, in_rate, opening_qty = cqty, actual_qty = s['actual_qty'], \
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is_cancelled = s['is_cancelled'])
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elif val_method == 'FIFO':
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val_rate, in_rate = self.get_fifo_inventory_values(in_rate, \
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actual_qty = s['actual_qty'])
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return val_rate, in_rate
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def get_stock_value(self, val_method, cqty, val_rate, serial_nos):
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if serial_nos:
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stock_val = flt(val_rate) * flt(cqty)
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elif val_method == 'Moving Average':
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stock_val = flt(cqty) > 0 and flt(val_rate) * flt(cqty) or 0
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elif val_method == 'FIFO':
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stock_val = sum([flt(d[0])*flt(d[1]) for d in self.fcfs_bal])
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return stock_val
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def update_entries_after(self, posting_date, posting_time, verbose=1):
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"""
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update valution rate and qty after transaction
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from the current time-bucket onwards
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"""
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# Get prev sle
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prev_sle = self.get_sle_prev_timebucket(posting_date, posting_time)
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# if no prev sle, start from the first one (for repost)
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if not prev_sle:
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cqty, cval, val_rate, stock_val, self.fcfs_bal = 0, 0, 0, 0, []
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# normal
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else:
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cqty = flt(prev_sle.get('qty_after_transaction', 0))
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cval =flt(prev_sle.get('stock_value', 0))
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val_rate = flt(prev_sle.get('valuation_rate', 0))
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self.fcfs_bal = eval(prev_sle.get('stock_queue', '[]') or '[]')
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# get valuation method
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from stock.utils import get_valuation_method
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val_method = get_valuation_method(self.doc.item_code)
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# allow negative stock (only for moving average method)
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from webnotes.utils import get_defaults
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allow_negative_stock = get_defaults().get('allow_negative_stock', 0)
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# recalculate the balances for all stock ledger entries
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# after the prev sle
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sll = sql("""
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select *
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from `tabStock Ledger Entry`
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where item_code = %s
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and warehouse = %s
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and ifnull(is_cancelled, 'No') = 'No'
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and timestamp(posting_date, posting_time) > timestamp(%s, %s)
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order by timestamp(posting_date, posting_time) asc, name asc""", \
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(self.doc.item_code, self.doc.warehouse, \
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prev_sle.get('posting_date','1900-01-01'), \
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prev_sle.get('posting_time', '12:00')), as_dict = 1)
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self.exc_list = []
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for sle in sll:
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# block if stock level goes negative on any date
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if (val_method != 'Moving Average') or (cint(allow_negative_stock) == 0):
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if self.validate_negative_stock(cqty, sle):
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cqty += sle['actual_qty']
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continue
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stock_val, in_rate = 0, sle['incoming_rate'] # IN
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serial_nos = sle["serial_no"] and ("'"+"', '".join(cstr(sle["serial_no"]).split('\n')) \
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+ "'") or ''
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# Get valuation rate
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val_rate, in_rate = self.get_valuation_rate(val_method, serial_nos, \
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val_rate, in_rate, stock_val, cqty, sle)
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# Qty upto the sle
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cqty += sle['actual_qty']
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# Stock Value upto the sle
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stock_val = self.get_stock_value(val_method, cqty, val_rate, serial_nos)
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# update current sle
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sql("""update `tabStock Ledger Entry`
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set qty_after_transaction=%s, valuation_rate=%s, stock_queue=%s, stock_value=%s,
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incoming_rate = %s where name=%s""", \
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(cqty, flt(val_rate), cstr(self.fcfs_bal), stock_val, in_rate, sle['name']))
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if self.exc_list:
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deficiency = min(e["diff"] for e in self.exc_list)
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msg = """Negative stock error:
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Cannot complete this transaction because stock will start
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becoming negative (%s) for Item <b>%s</b> in Warehouse
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<b>%s</b> on <b>%s %s</b> in Transaction %s %s.
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Total Quantity Deficiency: <b>%s</b>""" % \
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(self.exc_list[0]["diff"], self.doc.item_code, self.doc.warehouse,
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self.exc_list[0]["posting_date"], self.exc_list[0]["posting_time"],
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self.exc_list[0]["voucher_type"], self.exc_list[0]["voucher_no"],
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abs(deficiency))
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if verbose:
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msgprint(msg, raise_exception=1)
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else:
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raise webnotes.ValidationError, msg
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# update the bin
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if sll or not prev_sle:
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sql("""update `tabBin` set valuation_rate=%s, actual_qty=%s, stock_value = %s,
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projected_qty = (actual_qty + indented_qty + ordered_qty + planned_qty -
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reserved_qty) where name=%s
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""", (flt(val_rate), cqty, flt(stock_val), self.doc.name))
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def reorder_item(self,doc_type,doc_name):
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""" Reorder item if stock reaches reorder level"""
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