[IMP] l10n_it_fatturapa_in: Computation of prices with many digits

When price precision is increased during import, the price of the created lines should have been computed using the new precision

l10n_it_fatturapa_in/__init__.py

@@ -1,2 +1,3 @@
+from . import fields
 from . import models
 from . import wizard

l10n_it_fatturapa_in/fields.py

@@ -0,0 +1,47 @@
+#  Copyright 2024 Simone Rubino - Aion Tech
+#  License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo.fields import Float
+
+orig_convert_to_cache = Float.convert_to_cache
+orig_get_digits = Float.get_digits
+
+E_INVOICE_PRECISION_TO_FIELD = {
+    "Discount": "discount_decimal_digits",
+    "Product Price": "price_decimal_digits",
+    "Product Unit of Measure": "quantity_decimal_digits",
+}
+# Map a `decimal.precision` to the name of the field in `fatturapa.attachment`
+# that stores the value used during import
+
+
+def get_digits(self, env):
+    digits = orig_get_digits(self, env)
+    if e_invoice_precision := env.context.get("l10n_it_fatturapa_in_precision"):
+        digits = digits[0], e_invoice_precision
+    return digits
+
+
+def convert_to_cache(self, value, record, validate=True):
+    if record._name in ("account.move", "account.move.line"):
+        e_invoice = record.fatturapa_attachment_in_id
+        if e_invoice:
+            # The invoice [line] has been created by importing an e-invoice.
+            # If a different precision has been used,
+            # keep using that precision to read values that have it.
+            field_precision = self._digits
+            if isinstance(field_precision, str):
+                e_invoice_precision_field = E_INVOICE_PRECISION_TO_FIELD.get(
+                    field_precision
+                )
+                if e_invoice_precision_field:
+                    if e_invoice_precision := e_invoice[e_invoice_precision_field]:
+                        record = record.with_context(
+                            l10n_it_fatturapa_in_precision=e_invoice_precision
+                        )
+
+    return orig_convert_to_cache(self, value, record, validate=validate)
+
+
+Float.convert_to_cache = convert_to_cache
+Float.get_digits = get_digits

l10n_it_fatturapa_in/models/attachment.py

@@ -67,6 +67,24 @@ class FatturaPAAttachmentIn(models.Model):
         compute="_compute_linked_invoice_id_xml",
         store=True,
     )
+    price_decimal_digits = fields.Integer(
+        string="Prices decimal digits",
+        help="Value used during import of this e-invoice "
+        'to override "Product Price" precision.',
+        readonly=True,
+    )
+    quantity_decimal_digits = fields.Integer(
+        string="Quantities decimal digits",
+        help="Value used during import of this e-invoice "
+        'to override "Product Unit of Measure" precision.',
+        readonly=True,
+    )
+    discount_decimal_digits = fields.Integer(
+        string="Discounts decimal digits",
+        help="Value used during import of this e-invoice "
+        'to override "Discount" precision.',
+        readonly=True,
+    )
 
     _sql_constraints = [
         (

l10n_it_fatturapa_in/tests/data/IT01234567890_FPR16.xml

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<q1:FatturaElettronica xmlns:q1="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" versione="FPR12">
+   <FatturaElettronicaHeader>
+      <DatiTrasmissione>
+         <IdTrasmittente>
+            <IdPaese>IT</IdPaese>
+            <IdCodice>02780790107</IdCodice>
+         </IdTrasmittente>
+         <ProgressivoInvio>FPR14</ProgressivoInvio>
+         <FormatoTrasmissione>FPR12</FormatoTrasmissione>
+         <CodiceDestinatario>0000000</CodiceDestinatario>
+         <ContattiTrasmittente>
+            <Telefono>06543534343</Telefono>
+            <Email>[email protected]</Email>
+         </ContattiTrasmittente>
+         <PECDestinatario>[email protected]</PECDestinatario>
+      </DatiTrasmissione>
+      <CedentePrestatore>
+         <DatiAnagrafici>
+            <IdFiscaleIVA>
+               <IdPaese>IT</IdPaese>
+               <IdCodice>02780790107</IdCodice>
+            </IdFiscaleIVA>
+            <Anagrafica>
+               <Denominazione>YourCompany</Denominazione>
+            </Anagrafica>
+            <RegimeFiscale>RF01</RegimeFiscale>
+         </DatiAnagrafici>
+         <Sede>
+            <Indirizzo>Via Milano, 1</Indirizzo>
+            <CAP>00100</CAP>
+            <Comune>Roma</Comune>
+            <Provincia>AK</Provincia>
+            <Nazione>IT</Nazione>
+         </Sede>
+         <Contatti>
+            <Telefono>06543534343</Telefono>
+            <Email>[email protected]</Email>
+         </Contatti>
+      </CedentePrestatore>
+      <CessionarioCommittente>
+         <DatiAnagrafici>
+            <IdFiscaleIVA>
+               <IdPaese>IT</IdPaese>
+               <IdCodice>07973780013</IdCodice>
+            </IdFiscaleIVA>
+            <CodiceFiscale>07973780013</CodiceFiscale>
+            <Anagrafica>
+               <Denominazione>B2B Customer</Denominazione>
+            </Anagrafica>
+         </DatiAnagrafici>
+         <Sede>
+            <Indirizzo>Via Roma, 1</Indirizzo>
+            <CAP>16100</CAP>
+            <Comune>Genova</Comune>
+            <Provincia>AK</Provincia>
+            <Nazione>IT</Nazione>
+         </Sede>
+      </CessionarioCommittente>
+   </FatturaElettronicaHeader>
+   <FatturaElettronicaBody>
+      <DatiGenerali>
+         <DatiGeneraliDocumento>
+            <TipoDocumento>TD01</TipoDocumento>
+            <Divisa>EUR</Divisa>
+            <Data>2020-09-30</Data>
+            <Numero>14481</Numero>
+            <ImportoTotaleDocumento>81.49</ImportoTotaleDocumento>
+         </DatiGeneraliDocumento>
+      </DatiGenerali>
+      <DatiBeniServizi>
+         <DettaglioLinee>
+            <NumeroLinea>1</NumeroLinea>
+            <Descrizione>Test precisione decimale</Descrizione>
+            <Quantita>69.00</Quantita>
+            <PrezzoUnitario>0.968</PrezzoUnitario>
+            <PrezzoTotale>66.792</PrezzoTotale>
+            <AliquotaIVA>22.00</AliquotaIVA>
+         </DettaglioLinee>
+         <DatiRiepilogo>
+            <AliquotaIVA>22.00</AliquotaIVA>
+            <ImponibileImporto>66.79</ImponibileImporto>
+            <Imposta>14.69</Imposta>
+         </DatiRiepilogo>
+      </DatiBeniServizi>
+   </FatturaElettronicaBody>
+</q1:FatturaElettronica>

l10n_it_fatturapa_in/tests/fatturapa_common.py

@@ -288,6 +288,8 @@ def run_wizard(
     ):
         if module_name is None:
             module_name = "l10n_it_fatturapa_in"
+        if wiz_values is None:
+            wiz_values = dict()
         attach = self.create_attachment(name, file_name, module_name=module_name)
         attach.e_invoice_received_date = fields.Datetime.now()
         attach_id = attach.id
@@ -297,6 +299,8 @@ def run_wizard(
                     active_ids=[attach_id], active_model="fatturapa.attachment.in"
                 )
             )
+            for wiz_field, wiz_value in wiz_values.items():
+                setattr(wizard_form, wiz_field, wiz_value)
             wizard = wizard_form.save()
             return wizard.importFatturaPA()
         if mode == "link":

l10n_it_fatturapa_in/tests/test_import_fatturapa_xml.py

@@ -1150,6 +1150,65 @@ def test_ignore_global_discount(self):
         self.assertEqual(invoice.amount_tax, 5.12)
         self.assertEqual(invoice.amount_total, 28.39)
 
+    def test_increased_decimal_precision(self):
+        """
+        Increase price decimal precision during import:
+        computation of line's price is more accurate.
+        """
+        res = self.run_wizard(
+            "increased_decimal_precision",
+            "IT01234567890_FPR16.xml",
+            wiz_values={
+                "price_decimal_digits": 3,
+            },
+        )
+
+        # The new precision allows to compute the correct amount
+        invoice = self.invoice_model.search(res["domain"])
+        expected_invoice_values = {
+            "amount_untaxed": 66.79,
+            "amount_tax": 14.69,
+            "amount_total": 81.48,
+        }
+        self.assertRecordValues(
+            invoice,
+            [
+                expected_invoice_values,
+            ],
+        )
+        invoice_line = invoice.invoice_line_ids
+        expected_invoice_line_values = {
+            "price_subtotal": 66.79,
+            "price_total": 81.48,
+        }
+        self.assertRecordValues(
+            invoice_line,
+            [
+                expected_invoice_line_values,
+            ],
+        )
+
+        # Trigger amounts recomputation because:
+        # date triggers an update on date_due
+        # date_due triggers an update on needed_terms
+        # needed_terms needs amount_total_signed
+        with Form(invoice) as invoice_form:
+            invoice_form.date = fields.Date.today()
+
+        # The correct amount is kept
+        self.assertRecordValues(
+            invoice,
+            [
+                expected_invoice_values,
+            ],
+        )
+        self.assertRecordValues(
+            invoice_line,
+            [
+                expected_invoice_line_values,
+            ],
+        )
+
 
 class TestFatturaPAEnasarco(FatturapaCommon):
     def setUp(self):

l10n_it_fatturapa_in/wizard/wizard_import_fatturapa.py

@@ -1786,7 +1786,7 @@ def create_and_get_line_id(self, invoice_line_ids, invoice_line_model, upd_vals)
         )
         invoice_line_ids.append(invoice_line_id)
 
-    def _set_decimal_precision(self, precision_name, field_name):
+    def _set_decimal_precision(self, precision_name, field_name, attachments):
         precision = self.env["decimal.precision"].search(
             [("name", "=", precision_name)], limit=1
         )
@@ -1796,6 +1796,11 @@ def _set_decimal_precision(self, precision_name, field_name):
             different_precisions = self[field_name] != original_precision
             if different_precisions:
                 precision.sudo().digits = self[field_name]
+                attachments.update(
+                    {
+                        field_name: self[field_name],
+                    }
+                )
         return precision, different_precisions, original_precision
 
     def _restore_original_precision(self, precision, original_precision):
@@ -1808,28 +1813,34 @@ def _get_invoice_partner_id(self, fatt):
 
     def importFatturaPA(self):
         self.ensure_one()
+        fatturapa_attachments = self._get_selected_records()
 
         (
             price_precision,
             different_price_precisions,
             original_price_precision,
-        ) = self._set_decimal_precision("Product Price", "price_decimal_digits")
+        ) = self._set_decimal_precision(
+            "Product Price", "price_decimal_digits", attachments=fatturapa_attachments
+        )
         (
             qty_precision,
             different_qty_precisions,
             original_qty_precision,
         ) = self._set_decimal_precision(
-            "Product Unit of Measure", "quantity_decimal_digits"
+            "Product Unit of Measure",
+            "quantity_decimal_digits",
+            attachments=fatturapa_attachments,
         )
         (
             discount_precision,
             different_discount_precisions,
             original_discount_precision,
-        ) = self._set_decimal_precision("Discount", "discount_decimal_digits")
+        ) = self._set_decimal_precision(
+            "Discount", "discount_decimal_digits", attachments=fatturapa_attachments
+        )
 
         new_invoices = []
         # convert to dict in order to be able to modify context
-        fatturapa_attachments = self._get_selected_records()
         self.env.context = dict(self.env.context)
         for fatturapa_attachment in fatturapa_attachments:
             self.reset_inconsistencies()