253 lines
8.2 KiB
Python
253 lines
8.2 KiB
Python
#This file is part of Tryton. The COPYRIGHT file at the top level
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#of this repository contains the full copyright notices and license terms.
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import datetime
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from decimal import Decimal, ROUND_HALF_EVEN
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from trytond.model import ModelView, ModelSQL, fields
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from trytond.tools import safe_eval, datetime_strftime
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from trytond.transaction import Transaction
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from trytond.pool import Pool
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class Currency(ModelSQL, ModelView):
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'Currency'
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_name = 'currency.currency'
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_description = __doc__
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name = fields.Char('Name', required=True, translate=True)
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symbol = fields.Char('Symbol', size=10, required=True)
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code = fields.Char('Code', size=3, required=True)
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numeric_code = fields.Char('Numeric Code', size=3)
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rate = fields.Function(fields.Numeric('Current rate', digits=(12, 6),
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on_change_with=['rates']), 'get_rate')
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rates = fields.One2Many('currency.currency.rate', 'currency', 'Rates')
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rounding = fields.Numeric('Rounding factor', digits=(12, 6), required=True)
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digits = fields.Integer('Display Digits')
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active = fields.Boolean('Active')
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# monetary formatting
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mon_grouping = fields.Char('Grouping', required=True)
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mon_decimal_point = fields.Char('Decimal Separator', required=True)
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mon_thousands_sep = fields.Char('Thousands Separator')
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p_sign_posn = fields.Integer('Positive Sign Position')
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n_sign_posn = fields.Integer('Negative Sign Position')
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positive_sign = fields.Char('Positive Sign')
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negative_sign = fields.Char('Negative Sign')
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p_cs_precedes = fields.Boolean('Positive Currency Symbol Precedes')
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n_cs_precedes = fields.Boolean('Negative Currency Symbol Precedes')
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p_sep_by_space = fields.Boolean('Positive Separate by Space')
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n_sep_by_space = fields.Boolean('Negative Separate by Space')
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def __init__(self):
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super(Currency, self).__init__()
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self._order.insert(0, ('code', 'ASC'))
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self._constraints += [
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('check_mon_grouping', 'invalid_mon_grouping'),
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]
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self._error_messages.update({
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'no_rate': 'No rate found for the currency: %s at the date: %s',
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'invalid_grouping': 'Invalid Grouping!',
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})
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self._rpc.update({
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'compute': False,
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})
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def default_active(self):
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return True
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def default_rounding(self):
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return Decimal('0.01')
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def default_digits(self):
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return 2
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def default_mon_grouping(self):
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return '[]'
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def default_mon_thousands_sep(self):
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return ','
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def default_mon_decimal_point(self):
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return '.'
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def default_p_sign_posn(self):
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return 1
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def default_n_sign_posn(self):
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return 1
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def default_negative_sign(self):
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return '-'
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def default_positive_sign(self):
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return ''
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def default_p_cs_precedes(self):
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return True
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def default_n_cs_precedes(self):
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return True
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def default_p_sep_by_space(self):
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return False
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def default_n_sep_by_space(self):
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return False
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def check_mon_grouping(self, ids):
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'''
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Check if mon_grouping is list of numbers
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'''
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for currency in self.browse(ids):
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try:
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grouping = safe_eval(currency.mon_grouping)
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for i in grouping:
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if not isinstance(i, int):
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return False
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except Exception:
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return False
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return True
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def check_xml_record(self, ids, values):
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return True
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def search_rec_name(self, name, clause):
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ids = []
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field = None
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for field in ('code', 'numeric_code'):
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ids = self.search([(field,) + clause[1:]], limit=1)
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if ids:
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break
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if ids:
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return [(field,) + clause[1:]]
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return [(self._rec_name,) + clause[1:]]
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def on_change_with_rate(self, vals):
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now = datetime.date.today()
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closer = datetime.date.min
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res = Decimal('0.0')
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for rate in vals.get('rates', []):
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if 'date' not in rate or 'rate' not in rate:
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continue
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if rate['date'] <= now and rate['date'] > closer:
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res = rate['rate']
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closer = rate['date']
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return res
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def get_rate(self, ids, name):
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'''
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Return the rate at the date from the context or the current date
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'''
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rate_obj = Pool().get('currency.currency.rate')
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date_obj = Pool().get('ir.date')
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res = {}
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date = Transaction().context.get('date', date_obj.today())
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for currency_id in ids:
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rate_ids = rate_obj.search([
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('currency', '=', currency_id),
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('date', '<=', date),
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], limit=1, order=[('date', 'DESC')])
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if rate_ids:
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res[currency_id] = rate_ids[0]
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else:
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res[currency_id] = 0.0
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rate_ids = [x for x in res.values() if x]
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rates = rate_obj.browse(rate_ids)
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id2rate = {}
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for rate in rates:
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id2rate[rate.id] = rate
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for currency_id in res.keys():
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if res[currency_id]:
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res[currency_id] = id2rate[res[currency_id]].rate
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return res
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def round(self, currency, amount, rounding=ROUND_HALF_EVEN):
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'''
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Round the amount depending of the currency
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:param cursor: the database cursor
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:param user: the user id
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:param currency: a BrowseRecord of currency.currency
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:param amout: a Decimal
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:param rounding: the rounding option
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:return: a Decimal
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'''
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return (amount / currency.rounding).quantize(Decimal('1.'),
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rounding=rounding) * currency.rounding
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def is_zero(self, currency, amount):
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'Return True if the amount can be considered as zero for the currency'
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return abs(self.round(currency, amount)) < currency.rounding
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def compute(self, from_currency, amount, to_currency, round=True):
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'''
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Take a currency and an amount
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Return the amount to the new currency
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Use the rate of the date of the context or the current date if ids are
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given
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'''
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date_obj = Pool().get('ir.date')
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lang_obj = Pool().get('ir.lang')
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if isinstance(from_currency, (int, long)):
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from_currency = self.browse(from_currency)
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if isinstance(to_currency, (int, long)):
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to_currency = self.browse(to_currency)
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if to_currency == from_currency:
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if round:
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return self.round(to_currency, amount)
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else:
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return amount
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if (not from_currency.rate) or (not to_currency.rate):
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date = Transaction().context.get('date', date_obj.today())
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if not from_currency.rate:
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name = from_currency.name
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else:
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name = to_currency.name
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for code in [Transaction().language, 'en_US']:
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lang_ids = lang_obj.search([
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('code', '=', code),
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])
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if lang_ids:
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break
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lang = lang_obj.browse(lang_ids[0])
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self.raise_user_error('no_rate', (name,
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datetime_strftime(date, str(lang.date))))
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if round:
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return self.round(to_currency,
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amount * to_currency.rate / from_currency.rate)
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else:
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return amount * to_currency.rate / from_currency.rate
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Currency()
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class Rate(ModelSQL, ModelView):
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'Rate'
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_name = 'currency.currency.rate'
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_description = __doc__
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_rec_name = 'date'
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date = fields.Date('Date', required=True, select=1)
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rate = fields.Numeric('Rate', digits=(12, 6), required=1)
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currency = fields.Many2One('currency.currency', 'Currency',
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ondelete='CASCADE',)
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def __init__(self):
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super(Rate, self).__init__()
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self._sql_constraints = [
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('date_currency_uniq', 'UNIQUE(date, currency)',
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'A currency can only have one rate by date!'),
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]
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self._order.insert(0, ('date', 'DESC'))
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def default_date(self):
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date_obj = Pool().get('ir.date')
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return date_obj.today()
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def check_xml_record(self, ids, values):
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return True
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Rate()
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