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contract.py
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contract.py
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#! -*- coding: utf8 -*-
# The COPYRIGHT file at the top level of this repository contains
# the full copyright notices and license terms.
from trytond.model import fields
from trytond.transaction import Transaction
from trytond.pool import Pool, PoolMeta
from trytond.pyson import Eval
from trytond.modules.product import price_digits
from trytond.config import config as config_
from decimal import Decimal
__all__ = ['Contract', 'ContractConsumption', 'ContractLine']
__metaclass__ = PoolMeta
DISCOUNT_DIGITS = config_.getint('product', 'discount_decimal', default=4)
class Contract:
'Contract'
__name__ = 'contract'
contract_discount = fields.Numeric('Contract Discount',
digits=(16, DISCOUNT_DIGITS), states={
'readonly': Eval('state') != 'draft',
}, depends=['state'],
help='This discount will be applied in all lines after their own '
'discount.')
@classmethod
def __setup__(cls):
super(Contract, cls).__setup__()
if not cls.lines.context:
cls.lines.context = {}
cls.lines.context['contract_discount'] = Eval('contract_discount')
cls.lines.depends.append('contract_discount')
@staticmethod
def default_contract_discount():
return Decimal(0)
@classmethod
def write(cls, *args):
actions = iter(args)
contracts_todo = []
for contracts, _ in zip(actions, actions):
contracts_todo.extend(contracts)
super(Contract, cls).write(*args)
cls.apply_discount_to_lines(contracts_todo)
@classmethod
def create(cls, vlist):
contracts = super(Contract, cls).create(vlist)
cls.apply_discount_to_lines(contracts)
return contracts
@classmethod
def apply_discount_to_lines(cls, contracts):
Line = Pool().get('contract.line')
to_write = []
for contract in contracts:
for line in contract.lines:
old_unit_price = line.unit_price
line.update_prices()
if old_unit_price != line.unit_price:
to_write.append(line)
if to_write:
Line.save(to_write)
class ContractLine:
'Contract'
__name__ = 'contract.line'
gross_unit_price = fields.Numeric('Gross Price', digits=price_digits,
depends=['type'])
gross_unit_price_wo_round = fields.Numeric('Gross Price without rounding',
digits=(16, price_digits[1] + DISCOUNT_DIGITS), readonly=True)
discount = fields.Numeric('Discount', digits=(16, DISCOUNT_DIGITS),
depends=['type'])
@classmethod
def __setup__(cls):
super(ContractLine, cls).__setup__()
cls.unit_price.states['readonly'] = True
cls.unit_price.digits = (20, price_digits[1] + DISCOUNT_DIGITS)
def update_prices(self):
unit_price = None
gross_unit_price = gross_unit_price_wo_round = self.gross_unit_price
contract_discount = Transaction().context.get('contract_discount')
if contract_discount is None:
if (hasattr(self, 'contract') and
hasattr(self.contract, 'contract_discount')):
contract_discount = (self.contract.contract_discount or
Decimal(0))
else:
contract_discount = Decimal(0)
if self.gross_unit_price is not None and (self.discount is not None or
contract_discount is not None):
unit_price = self.gross_unit_price
if self.discount:
unit_price *= (1 - self.discount)
if contract_discount:
unit_price *= (1 - contract_discount)
if self.discount and contract_discount:
discount = (self.discount + contract_discount -
self.discount * contract_discount)
if discount != 1:
gross_unit_price_wo_round = unit_price / (1 - discount)
elif self.discount and self.discount != 1:
gross_unit_price_wo_round = unit_price / (1 - self.discount)
elif contract_discount and contract_discount != 1:
gross_unit_price_wo_round = \
unit_price / (1 - contract_discount)
digits = self.__class__.unit_price.digits[1]
unit_price = unit_price.quantize(Decimal(str(10.0 ** -digits)))
digits = self.__class__.gross_unit_price.digits[1]
gross_unit_price = gross_unit_price_wo_round.quantize(
Decimal(str(10.0 ** -digits)))
self.gross_unit_price = gross_unit_price
self.gross_unit_price_wo_round = gross_unit_price_wo_round
self.unit_price = unit_price
@fields.depends('gross_unit_price', 'discount',
'_parent_sale.sale_discount')
def on_change_gross_unit_price(self):
return self.update_prices()
@staticmethod
def default_discount():
return Decimal(0)
@fields.depends('gross_unit_price', 'discount',
'_parent_sale.sale_discount')
def on_change_discount(self):
return self.update_prices()
@fields.depends('discount', 'service', 'unit_price', 'description')
def on_change_service(self):
super(ContractLine, self).on_change_service()
self.gross_unit_price = self.unit_price
self.discount = Decimal(0)
if self.unit_price:
self.gross_unit_price = self.unit_price
self.update_prices()
@classmethod
def create(cls, vlist):
Contract = Pool().get('contract')
vlist = [x.copy() for x in vlist]
for vals in vlist:
if vals.get('unit_price') is None:
vals['gross_unit_price'] = Decimal(0)
continue
if 'gross_unit_price' not in vals:
gross_unit_price = vals['unit_price']
if vals.get('discount') not in (None, 1):
gross_unit_price = (gross_unit_price /
(1 - vals['discount']))
if vals.get('contract'):
contract = Contract(vals['contract'])
contract_discount = contract.contract_discount
if contract_discount not in (None, 1):
gross_unit_price = (gross_unit_price /
(1 - contract_discount))
if gross_unit_price != vals['unit_price']:
digits = cls.gross_unit_price.digits[1]
gross_unit_price = gross_unit_price.quantize(
Decimal(str(10.0 ** -digits)))
vals['gross_unit_price'] = gross_unit_price
if 'discount' not in vals:
vals['discount'] = Decimal(0)
return super(ContractLine, cls).create(vlist)
class ContractConsumption:
'Contract Consumption'
__name__ = 'contract.consumption'
def get_invoice_line(self):
line = super(ContractConsumption, self).get_invoice_line()
if line:
discount = None
if self.contract_line.gross_unit_price != line.unit_price:
line.gross_unit_price = round(line.unit_price, 4)
line.discount = Decimal('0')
if (self.contract_line.discount and self.contract and
self.contract.contract_discount):
discount = (Decimal('1.0') -
(Decimal('1.0') - self.contract_line.discount) *
(Decimal('1.0') - self.contract.contract_discount))
pass
elif self.contract and self.contract.contract_discount:
discount = self.contract.contract_discount
elif self.contract_line.discount:
discount = self.contract_line.discount
if discount:
bonificacion = (discount * 100).to_eng_string().replace(
'.', ',') + '%'
line.description += ' BONIFICACIÓN %s' % bonificacion
return line