issue #124 #170 add currency rate to invoice (for foreign currencies)

currency.py

@@ -1,22 +1,54 @@
 # The COPYRIGHT file at the top level of this repository contains
 # the full copyright notices and license terms.
+from decimal import Decimal
 import datetime
 from pyafipws.wsfev1 import WSFEv1
 from pyafipws.wsfexv1 import WSFEXv1
 from . import afip_auth
 
 from trytond.model import fields
 from trytond.pyson import Eval, If, In
-from trytond.pool import PoolMeta
+from trytond.pool import Pool, PoolMeta
+from trytond.transaction import Transaction
 
 __all__ = ['Currency', 'Rate']
 
 
 class Currency(metaclass=PoolMeta):
     __name__ = 'currency.currency'
+
     afip_code = fields.Char('AFIP Code', size=3,
         help="The 3 digits AFIP currency code.")
 
+    @classmethod
+    def compute(cls, from_currency, amount, to_currency, round=True):
+        pool = Pool()
+        Company = pool.get('company.company')
+
+        currency_rate = Transaction().context.get('currency_rate')
+        if not currency_rate:
+            return super(Currency, cls).compute(from_currency, amount,
+                to_currency, round)
+
+        if to_currency == from_currency:
+            if round:
+                return to_currency.round(amount)
+            else:
+                return amount
+
+        company = Company(Transaction().context['company'])
+        if from_currency == company.currency:
+            from_currency_rate = currency_rate
+            currency_rate = Decimal('1.0')
+        else:
+            from_currency_rate = Decimal('1.0')
+
+        if round:
+            return to_currency.round(
+                amount * currency_rate / from_currency_rate)
+        else:
+            return amount * currency_rate / from_currency_rate
+
 
 class Rate(metaclass=PoolMeta):
     __name__ = 'currency.currency.rate'

invoice.py

@@ -340,6 +340,8 @@ class Invoice(metaclass=PoolMeta):
         depends=_DEPENDS + ['company_party'])
     pyafipws_anulacion = fields.Boolean('FCE Anulación', states=_STATES,
         depends=_DEPENDS)
+    currency_rate = fields.Numeric('Currency rate', digits=(12, 6),
+        states={'readonly': Eval('state') != 'draft'}, depends=['state'])
 
     @classmethod
     def __setup__(cls):
@@ -445,6 +447,12 @@ def on_change_party(self):
         if self.party and self.party.iva_condition:
             self.party_iva_condition = self.party.iva_condition
 
+    @fields.depends('company', 'currency')
+    def on_change_currency(self):
+        if self.company and self.currency:
+            if self.company.currency != self.currency:
+                self.currency_rate = self.currency.rate
+
     @fields.depends('pos')
     def on_change_with_pos_pos_daily_report(self, name=None):
         if self.pos:
@@ -742,6 +750,7 @@ def _credit(self):
         Date = pool.get('ir.date')
 
         credit = super(Invoice, self)._credit()
+        credit.currency_rate = self.currency_rate
         if self.type == 'in':
             invoice_type, invoice_type_desc = INVOICE_CREDIT_AFIP_CODE[
                 str(int(self.tipo_comprobante))
@@ -838,6 +847,10 @@ def get_next_number(self, pattern=None):
                 return '%05d-%08d' % (self.pos.number, int(number))
             return SequenceStrict.get_id(sequence.id)
 
+    def get_move(self):
+        with Transaction().set_context(currency_rate=self.currency_rate):
+            return super(Invoice, self).get_move()
+
     def _get_move_line(self, date, amount):
         line = super(Invoice, self)._get_move_line(date, amount)
         ref_number = self.number if self.type == 'out' else self.reference
@@ -1315,28 +1328,31 @@ def strip_accents(text):
         imp_neto = str('%.2f' % imp_neto)
         imp_tot_conc = str('%.2f' % imp_tot_conc)
 
-        if self.company.currency.rate == Decimal('0'):
-            if self.party.vat_number_afip_foreign:
-                if batch:
-                    logger.error('missing_currency_rate: Invoice: %s, '
-                        'rate is not setted.' % self.id)
-                    return (ws, True)
-                self.raise_user_error('missing_currency_rate')
-            else:
-                ctz = 1
-        elif self.company.currency.rate == Decimal('1'):
-            ctz = 1 / self.currency.rate
-        else:
-            ctz = self.company.currency.rate / self.currency.rate
-
-        if not self.currency.afip_code:
+        # currency and rate
+        moneda_id = self.currency.afip_code
+        if not moneda_id:
             if batch:
                 logger.error('missing_currency_afip_code: Invoice: %s, '
                     'currency afip code is not setted.' % self.id)
                 return (ws, True)
             self.raise_user_error('missing_currency_afip_code')
 
-        moneda_id = self.currency.afip_code
+        if moneda_id != "PES":
+            ctz = self.currency_rate
+        else:
+            if self.company.currency.rate == Decimal('0'):
+                if self.party.vat_number_afip_foreign:
+                    if batch:
+                        logger.error('missing_currency_rate: Invoice: %s, '
+                            'rate is not setted.' % self.id)
+                        return (ws, True)
+                    self.raise_user_error('missing_currency_rate')
+                else:
+                    ctz = 1
+            elif self.company.currency.rate == Decimal('1'):
+                ctz = 1 / self.currency.rate
+            else:
+                ctz = self.company.currency.rate / self.currency.rate
         moneda_ctz = "{:.{}f}".format(ctz, 6)
 
         # foreign trade data: export permit, country code, etc.:

locale/es.po

@@ -110,6 +110,10 @@ msgctxt "field:account.invoice,annulled:"
 msgid "Annulled"
 msgstr "Anulada"
 
+msgctxt "field:account.invoice,currency_rate:"
+msgid "Currency rate"
+msgstr "Tasa de cambio"
+
 msgctxt "field:account.invoice,invoice_type:"
 msgid "Comprobante"
 msgstr "Tipo de factura"

view/invoice_form.xml

@@ -60,4 +60,10 @@
         <field name="annulled" xexpand="0"/>
     </xpath>
 
+    <xpath
+        expr="/form/notebook/page[@id='info']/field[@name='cancel_move']"
+        position="after">
+        <label name="currency_rate"/>
+        <field name="currency_rate"/>
+    </xpath>
 </data>