controllers/accounts_controller.py - Clicks/Forks/ERPNext - Gitiles

 # ERPNext - web based ERP (http://erpnext.com)
 # Copyright (C) 2012 Web Notes Technologies Pvt Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

 from __future__ import unicode_literals
 import webnotes
 from webnotes import _, msgprint
 from webnotes.utils import flt, cint, today
 from setup.utils import get_company_currency, get_price_list_currency
 from accounts.utils import get_fiscal_year
 from utilities.transaction_base import TransactionBase, validate_conversion_rate
 import json

 class AccountsController(TransactionBase):
 	def validate(self):
 		self.set_missing_values(for_validate=True)

 		if self.meta.get_field("currency"):
 			self.company_currency = get_company_currency(self.doc.company)

 			validate_conversion_rate(self.doc.currency, self.doc.conversion_rate,
 				self.meta.get_label("conversion_rate"), self.doc.company)

 			self.calculate_taxes_and_totals()
 			self.validate_value("grand_total", ">=", 0)
 			self.set_total_in_words()

 	def set_missing_values(self, for_validate=False):
 		for fieldname in ["posting_date", "transaction_date"]:
 			if not self.doc.fields.get(fieldname) and self.meta.get_field(fieldname):
 				self.doc.fields[fieldname] = today()
 				if not self.doc.fiscal_year:
 					self.doc.fiscal_year = get_fiscal_year(self.doc.fields[fieldname])[0]

 	def set_price_list_currency(self, buying_or_selling):
 		# TODO - change this, since price list now has only one currency allowed
 		if self.meta.get_field("price_list_name") and self.doc.price_list_name and \
 			not self.doc.price_list_currency:
 				self.doc.fields.update(get_price_list_currency({
 					"price_list_name": self.doc.price_list_name,
 					"buying_or_selling": buying_or_selling
 				}))

 				if self.doc.price_list_currency:
 					if not self.doc.plc_conversion_rate:
 						company_currency = get_company_currency(self.doc.company)
 						if self.doc.price_list_currency == company_currency:
 							self.doc.plc_conversion_rate = 1.0
 						else:
 							exchange = self.doc.price_list_currency + "-" + company_currency
 							self.doc.plc_conversion_rate = flt(webnotes.conn.get_value("Currency Exchange",
 								exchange, "exchange_rate"))

 					if not self.doc.currency:
 						self.doc.currency = self.doc.price_list_currency
 						self.doc.conversion_rate = self.doc.plc_conversion_rate

 	def set_missing_item_details(self, get_item_details):
 		"""set missing item values"""
 		for item in self.doclist.get({"parentfield": self.fname}):
 			if item.fields.get("item_code"):
 				args = item.fields.copy().update(self.doc.fields)
 				ret = get_item_details(args)
 				for fieldname, value in ret.items():
 					if self.meta.get_field(fieldname, parentfield=self.fname) and \
 						item.fields.get(fieldname) is None and value is not None:
 							item.fields[fieldname] = value

 	def set_taxes(self, tax_parentfield, tax_master_field):
 		if not self.meta.get_field(tax_parentfield):
 			return

 		tax_master_doctype = self.meta.get_field(tax_master_field).options

 		if not self.doclist.get({"parentfield": tax_parentfield}):
 			if not self.doc.fields.get(tax_master_field):
 				# get the default tax master
 				self.doc.fields[tax_master_field] = \
 					webnotes.conn.get_value(tax_master_doctype, {"is_default": 1})

 			self.append_taxes_from_master(tax_parentfield, tax_master_field, tax_master_doctype)

 	def append_taxes_from_master(self, tax_parentfield, tax_master_field, tax_master_doctype=None):
 		if self.doc.fields.get(tax_master_field):
 			if not tax_master_doctype:
 				tax_master_doctype = self.meta.get_field(tax_master_field).options

 			tax_doctype = self.meta.get_field(tax_parentfield).options

 			from webnotes.model import default_fields
 			tax_master = webnotes.bean(tax_master_doctype, self.doc.fields.get(tax_master_field))

 			for i, tax in enumerate(tax_master.doclist.get({"parentfield": tax_parentfield})):
 				for fieldname in default_fields:
 					tax.fields[fieldname] = None

 				tax.fields.update({
 					"doctype": tax_doctype,
 					"parentfield": tax_parentfield,
 					"idx": i+1
 				})

 				self.doclist.append(tax)

 	def calculate_taxes_and_totals(self):
 		self.doc.conversion_rate = flt(self.doc.conversion_rate)
 		self.item_doclist = self.doclist.get({"parentfield": self.fname})
 		self.tax_doclist = self.doclist.get({"parentfield": self.other_fname})

 		self.calculate_item_values()
 		self.initialize_taxes()

 		if hasattr(self, "determine_exclusive_rate"):
 			self.determine_exclusive_rate()

 		self.calculate_net_total()
 		self.calculate_taxes()
 		self.calculate_totals()
 		self._cleanup()

 		# TODO
 		# print format: show net_total_export instead of net_total

 	def initialize_taxes(self):
 		for tax in self.tax_doclist:
 			tax.item_wise_tax_detail = {}
 			for fieldname in ["tax_amount", "total",
 				"tax_amount_for_current_item", "grand_total_for_current_item",
 				"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"]:
 					tax.fields[fieldname] = 0.0

 			self.validate_on_previous_row(tax)
 			self.validate_inclusive_tax(tax)
 			self.round_floats_in(tax)

 	def validate_on_previous_row(self, tax):
 		"""
 			validate if a valid row id is mentioned in case of
 			On Previous Row Amount and On Previous Row Total
 		"""
 		if tax.charge_type in ["On Previous Row Amount", "On Previous Row Total"] and \
 				(not tax.row_id or cint(tax.row_id) >= tax.idx):
 			msgprint((_("Row") + " # %(idx)s [%(taxes_doctype)s]: " + \
 				_("Please specify a valid") + " %(row_id_label)s") % {
 					"idx": tax.idx,
 					"taxes_doctype": tax.doctype,
 					"row_id_label": self.meta.get_label("row_id",
 						parentfield=self.other_fname)
 				}, raise_exception=True)

 	def validate_inclusive_tax(self, tax):
 		def _on_previous_row_error(row_range):
 			msgprint((_("Row") + " # %(idx)s [%(doctype)s]: " +
 				_("to be included in Item's rate, it is required that: ") +
 				" [" + _("Row") + " # %(row_range)s] " + _("also be included in Item's rate")) % {
 					"idx": tax.idx,
 					"doctype": tax.doctype,
 					"inclusive_label": self.meta.get_label("included_in_print_rate",
 						parentfield=self.other_fname),
 					"charge_type_label": self.meta.get_label("charge_type",
 						parentfield=self.other_fname),
 					"charge_type": tax.charge_type,
 					"row_range": row_range
 				}, raise_exception=True)

 		if cint(tax.included_in_print_rate):
 			if tax.charge_type == "Actual":
 				# inclusive tax cannot be of type Actual
 				msgprint((_("Row")
 					+ " # %(idx)s [%(doctype)s]: %(charge_type_label)s = \"%(charge_type)s\" "
 					+ "cannot be included in Item's rate") % {
 						"idx": tax.idx,
 						"doctype": tax.doctype,
 						"charge_type_label": self.meta.get_label("charge_type",
 							parentfield=self.other_fname),
 						"charge_type": tax.charge_type,
 					}, raise_exception=True)
 			elif tax.charge_type == "On Previous Row Amount" and \
 					not cint(self.tax_doclist[tax.row_id - 1].included_in_print_rate):
 				# referred row should also be inclusive
 				_on_previous_row_error(tax.row_id)
 			elif tax.charge_type == "On Previous Row Total" and \
 					not all([cint(t.included_in_print_rate) for t in self.tax_doclist[:tax.row_id - 1]]):
 				# all rows about the reffered tax should be inclusive
 				_on_previous_row_error("1 - %d" % (tax.row_id,))

 	def calculate_taxes(self):
 		for item in self.item_doclist:
 			item_tax_map = self._load_item_tax_rate(item.item_tax_rate)

 			for i, tax in enumerate(self.tax_doclist):
 				# tax_amount represents the amount of tax for the current step
 				current_tax_amount = self.get_current_tax_amount(item, tax, item_tax_map)

 				if hasattr(self, "set_item_tax_amount"):
 					self.set_item_tax_amount(item, tax, current_tax_amount)

 				# case when net total is 0 but there is an actual type charge
 				# in this case add the actual amount to tax.tax_amount
 				# and tax.grand_total_for_current_item for the first such iteration
 				if tax.charge_type=="Actual" and \
 						not (current_tax_amount or self.doc.net_total or tax.tax_amount):
 					zero_net_total_adjustment = flt(tax.rate, self.precision("tax_amount", tax))
 					current_tax_amount += zero_net_total_adjustment

 				# store tax_amount for current item as it will be used for
 				# charge type = 'On Previous Row Amount'
 				tax.tax_amount_for_current_item = current_tax_amount

 				# accumulate tax amount into tax.tax_amount
 				tax.tax_amount += current_tax_amount

 				if tax.category:
 					# if just for valuation, do not add the tax amount in total
 					# hence, setting it as 0 for further steps
 					current_tax_amount = 0.0 if (tax.category == "Valuation") else current_tax_amount

 					current_tax_amount *= -1.0 if (tax.add_deduct_tax == "Deduct") else 1.0

 				# Calculate tax.total viz. grand total till that step
 				# note: grand_total_for_current_item contains the contribution of
 				# item's amount, previously applied tax and the current tax on that item
 				if i==0:
 					tax.grand_total_for_current_item = flt(item.amount +
 						current_tax_amount, self.precision("total", tax))

 				else:
 					tax.grand_total_for_current_item = \
 						flt(self.tax_doclist[i-1].grand_total_for_current_item +
 							current_tax_amount, self.precision("total", tax))

 				# in tax.total, accumulate grand total of each item
 				tax.total += tax.grand_total_for_current_item

 	def get_current_tax_amount(self, item, tax, item_tax_map):
 		tax_rate = self._get_tax_rate(tax, item_tax_map)
 		current_tax_amount = 0.0

 		if tax.charge_type == "Actual":
 			# distribute the tax amount proportionally to each item row
 			actual = flt(tax.rate, self.precision("tax_amount", tax))
 			current_tax_amount = (self.doc.net_total
 				and ((item.amount / self.doc.net_total) * actual)
 				or 0)
 		elif tax.charge_type == "On Net Total":
 			current_tax_amount = (tax_rate / 100.0) * item.amount
 		elif tax.charge_type == "On Previous Row Amount":
 			current_tax_amount = (tax_rate / 100.0) * \
 				self.tax_doclist[cint(tax.row_id) - 1].tax_amount_for_current_item
 		elif tax.charge_type == "On Previous Row Total":
 			current_tax_amount = (tax_rate / 100.0) * \
 				self.tax_doclist[cint(tax.row_id) - 1].grand_total_for_current_item

 		current_tax_amount = flt(current_tax_amount, self.precision("tax_amount", tax))

 		# store tax breakup for each item
 		tax.item_wise_tax_detail[item.item_code or item.item_name] = [tax_rate, current_tax_amount]

 		return current_tax_amount

 	def _load_item_tax_rate(self, item_tax_rate):
 		return json.loads(item_tax_rate) if item_tax_rate else {}

 	def _get_tax_rate(self, tax, item_tax_map):
 		if item_tax_map.has_key(tax.account_head):
 			return flt(item_tax_map.get(tax.account_head), self.precision("rate", tax))
 		else:
 			return tax.rate

 	def _cleanup(self):
 		for tax in self.tax_doclist:
 			for fieldname in ("grand_total_for_current_item",
 				"tax_amount_for_current_item",
 				"tax_fraction_for_current_item",
 				"grand_total_fraction_for_current_item"):
 				if fieldname in tax.fields:
 					del tax.fields[fieldname]

 			tax.item_wise_tax_detail = json.dumps(tax.item_wise_tax_detail)

 	def _set_in_company_currency(self, item, print_field, base_field):
 		"""set values in base currency"""
 		item.fields[base_field] = flt((flt(item.fields[print_field],
 			self.precision(print_field, item)) * self.doc.conversion_rate),
 			self.precision(base_field, item))

 	def calculate_total_advance(self, parenttype, advance_parentfield):
 		if self.doc.doctype == parenttype and self.doc.docstatus < 2:
 			sum_of_allocated_amount = sum([flt(adv.allocated_amount, self.precision("allocated_amount", adv))
 				for adv in self.doclist.get({"parentfield": advance_parentfield})])

 			self.doc.total_advance = flt(sum_of_allocated_amount, self.precision("total_advance"))

 			self.calculate_outstanding_amount()

 	def get_gl_dict(self, args, cancel=None):
 		"""this method populates the common properties of a gl entry record"""
 		if cancel is None:
 			cancel = (self.doc.docstatus == 2)

 		gl_dict = {
 			'company': self.doc.company,
 			'posting_date': self.doc.posting_date,
 			'voucher_type': self.doc.doctype,
 			'voucher_no': self.doc.name,
 			'aging_date': self.doc.fields.get("aging_date") or self.doc.posting_date,
 			'remarks': self.doc.remarks,
 			'is_cancelled': cancel and "Yes" or "No",
 			'fiscal_year': self.doc.fiscal_year,
 			'debit': 0,
 			'credit': 0,
 			'is_opening': self.doc.fields.get("is_opening") or "No",
 		}
 		gl_dict.update(args)
 		return gl_dict

 	def clear_unallocated_advances(self, childtype, parentfield):
 		self.doclist.remove_items({"parentfield": parentfield, "allocated_amount": ["in", [0, None, ""]]})

 		webnotes.conn.sql("""delete from `tab%s` where parentfield=%s and parent = %s
 			and ifnull(allocated_amount, 0) = 0""" % (childtype, '%s', '%s'), (parentfield, self.doc.name))

 	def get_advances(self, account_head, child_doctype, parentfield, dr_or_cr):
 		res = webnotes.conn.sql("""select t1.name as jv_no, t1.remark,
 			t2.%s as amount, t2.name as jv_detail_no
 			from `tabJournal Voucher` t1, `tabJournal Voucher Detail` t2
 			where t1.name = t2.parent and t2.account = %s and t2.is_advance = 'Yes'
 			and (t2.against_voucher is null or t2.against_voucher = '')
 			and (t2.against_invoice is null or t2.against_invoice = '')
 			and (t2.against_jv is null or t2.against_jv = '')
 			and t1.docstatus = 1 order by t1.posting_date""" %
 			(dr_or_cr, '%s'), account_head, as_dict=1)

 		self.doclist = self.doc.clear_table(self.doclist, parentfield)
 		for d in res:
 			self.doclist.append({
 				"doctype": child_doctype,
 				"parentfield": parentfield,
 				"journal_voucher": d.jv_no,
 				"jv_detail_no": d.jv_detail_no,
 				"remarks": d.remark,
 				"advance_amount": flt(d.amount),
 				"allocate_amount": 0
 			})

 	def get_company_default(self, fieldname):
 		from accounts.utils import get_company_default
 		return get_company_default(self.doc.company, fieldname)


 	@property
 	def stock_items(self):
 		if not hasattr(self, "_stock_items"):
 			self._stock_items = []
 			item_codes = list(set(item.item_code for item in
 				self.doclist.get({"parentfield": self.fname})))
 			if item_codes:
 				self._stock_items = [r[0] for r in webnotes.conn.sql("""select name
 					from `tabItem` where name in (%s) and is_stock_item='Yes'""" % \
 					(", ".join((["%s"]*len(item_codes))),), item_codes)]

 		return self._stock_items

 	@property
 	def company_abbr(self):
 		if not hasattr(self, "_abbr"):
 			self._abbr = webnotes.conn.get_value("Company", self.doc.company, "abbr")

 		return self._abbr
	# ERPNext - web based ERP (http://erpnext.com)
	# Copyright (C) 2012 Web Notes Technologies Pvt Ltd
	#
	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program. If not, see <http://www.gnu.org/licenses/>.

	from __future__ import unicode_literals
	import webnotes
	from webnotes import _, msgprint
	from webnotes.utils import flt, cint, today
	from setup.utils import get_company_currency, get_price_list_currency
	from accounts.utils import get_fiscal_year
	from utilities.transaction_base import TransactionBase, validate_conversion_rate
	import json

	class AccountsController(TransactionBase):
	def validate(self):
	self.set_missing_values(for_validate=True)

	if self.meta.get_field("currency"):
	self.company_currency = get_company_currency(self.doc.company)

	validate_conversion_rate(self.doc.currency, self.doc.conversion_rate,
	self.meta.get_label("conversion_rate"), self.doc.company)

	self.calculate_taxes_and_totals()
	self.validate_value("grand_total", ">=", 0)
	self.set_total_in_words()

	def set_missing_values(self, for_validate=False):
	for fieldname in ["posting_date", "transaction_date"]:
	if not self.doc.fields.get(fieldname) and self.meta.get_field(fieldname):
	self.doc.fields[fieldname] = today()
	if not self.doc.fiscal_year:
	self.doc.fiscal_year = get_fiscal_year(self.doc.fields[fieldname])[0]

	def set_price_list_currency(self, buying_or_selling):
	# TODO - change this, since price list now has only one currency allowed
	if self.meta.get_field("price_list_name") and self.doc.price_list_name and \
	not self.doc.price_list_currency:
	self.doc.fields.update(get_price_list_currency({
	"price_list_name": self.doc.price_list_name,
	"buying_or_selling": buying_or_selling
	}))

	if self.doc.price_list_currency:
	if not self.doc.plc_conversion_rate:
	company_currency = get_company_currency(self.doc.company)
	if self.doc.price_list_currency == company_currency:
	self.doc.plc_conversion_rate = 1.0
	else:
	exchange = self.doc.price_list_currency + "-" + company_currency
	self.doc.plc_conversion_rate = flt(webnotes.conn.get_value("Currency Exchange",
	exchange, "exchange_rate"))

	if not self.doc.currency:
	self.doc.currency = self.doc.price_list_currency
	self.doc.conversion_rate = self.doc.plc_conversion_rate

	def set_missing_item_details(self, get_item_details):
	"""set missing item values"""
	for item in self.doclist.get({"parentfield": self.fname}):
	if item.fields.get("item_code"):
	args = item.fields.copy().update(self.doc.fields)
	ret = get_item_details(args)
	for fieldname, value in ret.items():
	if self.meta.get_field(fieldname, parentfield=self.fname) and \
	item.fields.get(fieldname) is None and value is not None:
	item.fields[fieldname] = value

	def set_taxes(self, tax_parentfield, tax_master_field):
	if not self.meta.get_field(tax_parentfield):
	return

	tax_master_doctype = self.meta.get_field(tax_master_field).options

	if not self.doclist.get({"parentfield": tax_parentfield}):
	if not self.doc.fields.get(tax_master_field):
	# get the default tax master
	self.doc.fields[tax_master_field] = \
	webnotes.conn.get_value(tax_master_doctype, {"is_default": 1})

	self.append_taxes_from_master(tax_parentfield, tax_master_field, tax_master_doctype)

	def append_taxes_from_master(self, tax_parentfield, tax_master_field, tax_master_doctype=None):
	if self.doc.fields.get(tax_master_field):
	if not tax_master_doctype:
	tax_master_doctype = self.meta.get_field(tax_master_field).options

	tax_doctype = self.meta.get_field(tax_parentfield).options

	from webnotes.model import default_fields
	tax_master = webnotes.bean(tax_master_doctype, self.doc.fields.get(tax_master_field))

	for i, tax in enumerate(tax_master.doclist.get({"parentfield": tax_parentfield})):
	for fieldname in default_fields:
	tax.fields[fieldname] = None

	tax.fields.update({
	"doctype": tax_doctype,
	"parentfield": tax_parentfield,
	"idx": i+1
	})

	self.doclist.append(tax)

	def calculate_taxes_and_totals(self):
	self.doc.conversion_rate = flt(self.doc.conversion_rate)
	self.item_doclist = self.doclist.get({"parentfield": self.fname})
	self.tax_doclist = self.doclist.get({"parentfield": self.other_fname})

	self.calculate_item_values()
	self.initialize_taxes()

	if hasattr(self, "determine_exclusive_rate"):
	self.determine_exclusive_rate()

	self.calculate_net_total()
	self.calculate_taxes()
	self.calculate_totals()
	self._cleanup()

	# TODO
	# print format: show net_total_export instead of net_total

	def initialize_taxes(self):
	for tax in self.tax_doclist:
	tax.item_wise_tax_detail = {}
	for fieldname in ["tax_amount", "total",
	"tax_amount_for_current_item", "grand_total_for_current_item",
	"tax_fraction_for_current_item", "grand_total_fraction_for_current_item"]:
	tax.fields[fieldname] = 0.0

	self.validate_on_previous_row(tax)
	self.validate_inclusive_tax(tax)
	self.round_floats_in(tax)

	def validate_on_previous_row(self, tax):
	"""
	validate if a valid row id is mentioned in case of
	On Previous Row Amount and On Previous Row Total
	"""
	if tax.charge_type in ["On Previous Row Amount", "On Previous Row Total"] and \
	(not tax.row_id or cint(tax.row_id) >= tax.idx):
	msgprint((_("Row") + " # %(idx)s [%(taxes_doctype)s]: " + \
	_("Please specify a valid") + " %(row_id_label)s") % {
	"idx": tax.idx,
	"taxes_doctype": tax.doctype,
	"row_id_label": self.meta.get_label("row_id",
	parentfield=self.other_fname)
	}, raise_exception=True)

	def validate_inclusive_tax(self, tax):
	def _on_previous_row_error(row_range):
	msgprint((_("Row") + " # %(idx)s [%(doctype)s]: " +
	_("to be included in Item's rate, it is required that: ") +
	" [" + _("Row") + " # %(row_range)s] " + _("also be included in Item's rate")) % {
	"idx": tax.idx,
	"doctype": tax.doctype,
	"inclusive_label": self.meta.get_label("included_in_print_rate",
	parentfield=self.other_fname),
	"charge_type_label": self.meta.get_label("charge_type",
	parentfield=self.other_fname),
	"charge_type": tax.charge_type,
	"row_range": row_range
	}, raise_exception=True)

	if cint(tax.included_in_print_rate):
	if tax.charge_type == "Actual":
	# inclusive tax cannot be of type Actual
	msgprint((_("Row")
	+ " # %(idx)s [%(doctype)s]: %(charge_type_label)s = \"%(charge_type)s\" "
	+ "cannot be included in Item's rate") % {
	"idx": tax.idx,
	"doctype": tax.doctype,
	"charge_type_label": self.meta.get_label("charge_type",
	parentfield=self.other_fname),
	"charge_type": tax.charge_type,
	}, raise_exception=True)
	elif tax.charge_type == "On Previous Row Amount" and \
	not cint(self.tax_doclist[tax.row_id - 1].included_in_print_rate):
	# referred row should also be inclusive
	_on_previous_row_error(tax.row_id)
	elif tax.charge_type == "On Previous Row Total" and \
	not all([cint(t.included_in_print_rate) for t in self.tax_doclist[:tax.row_id - 1]]):
	# all rows about the reffered tax should be inclusive
	_on_previous_row_error("1 - %d" % (tax.row_id,))

	def calculate_taxes(self):
	for item in self.item_doclist:
	item_tax_map = self._load_item_tax_rate(item.item_tax_rate)

	for i, tax in enumerate(self.tax_doclist):
	# tax_amount represents the amount of tax for the current step
	current_tax_amount = self.get_current_tax_amount(item, tax, item_tax_map)

	if hasattr(self, "set_item_tax_amount"):
	self.set_item_tax_amount(item, tax, current_tax_amount)

	# case when net total is 0 but there is an actual type charge
	# in this case add the actual amount to tax.tax_amount
	# and tax.grand_total_for_current_item for the first such iteration
	if tax.charge_type=="Actual" and \
	not (current_tax_amount or self.doc.net_total or tax.tax_amount):
	zero_net_total_adjustment = flt(tax.rate, self.precision("tax_amount", tax))
	current_tax_amount += zero_net_total_adjustment

	# store tax_amount for current item as it will be used for
	# charge type = 'On Previous Row Amount'
	tax.tax_amount_for_current_item = current_tax_amount

	# accumulate tax amount into tax.tax_amount
	tax.tax_amount += current_tax_amount

	if tax.category:
	# if just for valuation, do not add the tax amount in total
	# hence, setting it as 0 for further steps
	current_tax_amount = 0.0 if (tax.category == "Valuation") else current_tax_amount

	current_tax_amount *= -1.0 if (tax.add_deduct_tax == "Deduct") else 1.0

	# Calculate tax.total viz. grand total till that step
	# note: grand_total_for_current_item contains the contribution of
	# item's amount, previously applied tax and the current tax on that item
	if i==0:
	tax.grand_total_for_current_item = flt(item.amount +
	current_tax_amount, self.precision("total", tax))

	else:
	tax.grand_total_for_current_item = \
	flt(self.tax_doclist[i-1].grand_total_for_current_item +
	current_tax_amount, self.precision("total", tax))

	# in tax.total, accumulate grand total of each item
	tax.total += tax.grand_total_for_current_item

	def get_current_tax_amount(self, item, tax, item_tax_map):
	tax_rate = self._get_tax_rate(tax, item_tax_map)
	current_tax_amount = 0.0

	if tax.charge_type == "Actual":
	# distribute the tax amount proportionally to each item row
	actual = flt(tax.rate, self.precision("tax_amount", tax))
	current_tax_amount = (self.doc.net_total
	and ((item.amount / self.doc.net_total) * actual)
	or 0)
	elif tax.charge_type == "On Net Total":
	current_tax_amount = (tax_rate / 100.0) * item.amount
	elif tax.charge_type == "On Previous Row Amount":
	current_tax_amount = (tax_rate / 100.0) * \
	self.tax_doclist[cint(tax.row_id) - 1].tax_amount_for_current_item
	elif tax.charge_type == "On Previous Row Total":
	current_tax_amount = (tax_rate / 100.0) * \
	self.tax_doclist[cint(tax.row_id) - 1].grand_total_for_current_item

	current_tax_amount = flt(current_tax_amount, self.precision("tax_amount", tax))

	# store tax breakup for each item
	tax.item_wise_tax_detail[item.item_code or item.item_name] = [tax_rate, current_tax_amount]

	return current_tax_amount

	def _load_item_tax_rate(self, item_tax_rate):
	return json.loads(item_tax_rate) if item_tax_rate else {}

	def _get_tax_rate(self, tax, item_tax_map):
	if item_tax_map.has_key(tax.account_head):
	return flt(item_tax_map.get(tax.account_head), self.precision("rate", tax))
	else:
	return tax.rate

	def _cleanup(self):
	for tax in self.tax_doclist:
	for fieldname in ("grand_total_for_current_item",
	"tax_amount_for_current_item",
	"tax_fraction_for_current_item",
	"grand_total_fraction_for_current_item"):
	if fieldname in tax.fields:
	del tax.fields[fieldname]

	tax.item_wise_tax_detail = json.dumps(tax.item_wise_tax_detail)

	def _set_in_company_currency(self, item, print_field, base_field):
	"""set values in base currency"""
	item.fields[base_field] = flt((flt(item.fields[print_field],
	self.precision(print_field, item)) * self.doc.conversion_rate),
	self.precision(base_field, item))

	def calculate_total_advance(self, parenttype, advance_parentfield):
	if self.doc.doctype == parenttype and self.doc.docstatus < 2:
	sum_of_allocated_amount = sum([flt(adv.allocated_amount, self.precision("allocated_amount", adv))
	for adv in self.doclist.get({"parentfield": advance_parentfield})])

	self.doc.total_advance = flt(sum_of_allocated_amount, self.precision("total_advance"))

	self.calculate_outstanding_amount()

	def get_gl_dict(self, args, cancel=None):
	"""this method populates the common properties of a gl entry record"""
	if cancel is None:
	cancel = (self.doc.docstatus == 2)

	gl_dict = {
	'company': self.doc.company,
	'posting_date': self.doc.posting_date,
	'voucher_type': self.doc.doctype,
	'voucher_no': self.doc.name,
	'aging_date': self.doc.fields.get("aging_date") or self.doc.posting_date,
	'remarks': self.doc.remarks,
	'is_cancelled': cancel and "Yes" or "No",
	'fiscal_year': self.doc.fiscal_year,
	'debit': 0,
	'credit': 0,
	'is_opening': self.doc.fields.get("is_opening") or "No",
	}
	gl_dict.update(args)
	return gl_dict

	def clear_unallocated_advances(self, childtype, parentfield):
	self.doclist.remove_items({"parentfield": parentfield, "allocated_amount": ["in", [0, None, ""]]})

	webnotes.conn.sql("""delete from `tab%s` where parentfield=%s and parent = %s
	and ifnull(allocated_amount, 0) = 0""" % (childtype, '%s', '%s'), (parentfield, self.doc.name))

	def get_advances(self, account_head, child_doctype, parentfield, dr_or_cr):
	res = webnotes.conn.sql("""select t1.name as jv_no, t1.remark,
	t2.%s as amount, t2.name as jv_detail_no
	from `tabJournal Voucher` t1, `tabJournal Voucher Detail` t2
	where t1.name = t2.parent and t2.account = %s and t2.is_advance = 'Yes'
	and (t2.against_voucher is null or t2.against_voucher = '')
	and (t2.against_invoice is null or t2.against_invoice = '')
	and (t2.against_jv is null or t2.against_jv = '')
	and t1.docstatus = 1 order by t1.posting_date""" %
	(dr_or_cr, '%s'), account_head, as_dict=1)

	self.doclist = self.doc.clear_table(self.doclist, parentfield)
	for d in res:
	self.doclist.append({
	"doctype": child_doctype,
	"parentfield": parentfield,
	"journal_voucher": d.jv_no,
	"jv_detail_no": d.jv_detail_no,
	"remarks": d.remark,
	"advance_amount": flt(d.amount),
	"allocate_amount": 0
	})

	def get_company_default(self, fieldname):
	from accounts.utils import get_company_default
	return get_company_default(self.doc.company, fieldname)


	@property
	def stock_items(self):
	if not hasattr(self, "_stock_items"):
	self._stock_items = []
	item_codes = list(set(item.item_code for item in
	self.doclist.get({"parentfield": self.fname})))
	if item_codes:
	self._stock_items = [r[0] for r in webnotes.conn.sql("""select name
	from `tabItem` where name in (%s) and is_stock_item='Yes'""" % \
	(", ".join((["%s"]*len(item_codes))),), item_codes)]

	return self._stock_items

	@property
	def company_abbr(self):
	if not hasattr(self, "_abbr"):
	self._abbr = webnotes.conn.get_value("Company", self.doc.company, "abbr")

	return self._abbr