[IMP] contract: remove redundant method

I have detected a method that was created as redundant and with the same
technique used when preparing the line values, so better to have
everything together in the same method instead of having it spread.

contract/models/contract.py

@@ -332,56 +332,32 @@ class ContractContract(models.Model):
 
     @api.model
     def _finalize_invoice_values(self, invoice_values):
-        """
-        This method adds the missing values in the invoice lines dictionaries.
-
-        If no account on the product, the invoice lines account is
-        taken from the invoice's journal in _onchange_product_id
-        This code is not in finalize_creation_from_contract because it's
-        not possible to create an invoice line with no account
-
-        :param invoice_values: dictionary (invoice values)
-        :return: updated dictionary (invoice values)
-        """
-        # If no account on the product, the invoice lines account is
-        # taken from the invoice's journal in _onchange_product_id
-        # This code is not in finalize_creation_from_contract because it's
-        # not possible to create an invoice line with no account
-        new_invoice = self.env['account.invoice'].with_context(
-            force_company=invoice_values['company_id'],
-        ).new(invoice_values)
-        for invoice_line in new_invoice.invoice_line_ids:
-            name = invoice_line.name
-            account_analytic_id = invoice_line.account_analytic_id
-            price_unit = invoice_line.price_unit
-            invoice_line.invoice_id = new_invoice
-            invoice_line._onchange_product_id()
-            invoice_line.update(
-                {
-                    'name': name,
-                    'account_analytic_id': account_analytic_id,
-                    'price_unit': price_unit,
-                }
-            )
-        return new_invoice._convert_to_write(new_invoice._cache)
+        """Provided for keeping compatibility in this version."""
+        # TODO: Must be removed in >=13.0
+        return invoice_values
 
     @api.model
     def _finalize_invoice_creation(self, invoices):
+        """This method is called right after the creation of the invoices.
+
+        Override it when you need to do something after the records are created
+        in the DB. If you need to modify any value, better to do it on the
+        _prepare_* methods on contract or contract line.
+        """
         invoices.compute_taxes()
 
     @api.model
     def _finalize_and_create_invoices(self, invoices_values):
-        """
-        This method:
-         - finalizes the invoices values (onchange's...)
+        """This method:
+
          - creates the invoices
-         - finalizes the created invoices (onchange's, tax computation...)
+         - finalizes the created invoices (tax computation...)
+
         :param invoices_values: list of dictionaries (invoices values)
         :return: created invoices (account.invoice)
         """
-        if isinstance(invoices_values, dict):
-            invoices_values = [invoices_values]
         final_invoices_values = []
+        # TODO: This call must be removed in >=13.0
         for invoice_values in invoices_values:
             final_invoices_values.append(
                 self._finalize_invoice_values(invoice_values)
@@ -442,7 +418,7 @@ class ContractContract(models.Model):
             for line in contract_lines:
                 invoice_values.setdefault('invoice_line_ids', [])
                 invoice_line_values = line._prepare_invoice_line(
-                    invoice_id=False
+                    invoice_values=invoice_values,
                 )
                 if invoice_line_values:
                     invoice_values['invoice_line_ids'].append(

contract/models/contract_line.py

@@ -644,7 +644,7 @@ class ContractLine(models.Model):
                     )
 
     @api.multi
-    def _prepare_invoice_line(self, invoice_id=False):
+    def _prepare_invoice_line(self, invoice_id=False, invoice_values=False):
         self.ensure_one()
         dates = self._get_period_to_invoice(
             self.last_date_invoiced, self.recurring_next_date
@@ -661,6 +661,11 @@ class ContractLine(models.Model):
         invoice_line = self.env['account.invoice.line'].with_context(
             force_company=self.contract_id.company_id.id,
         ).new(invoice_line_vals)
+        if invoice_values and not invoice_id:
+            invoice = self.env['account.invoice'].with_context(
+                force_company=self.contract_id.company_id.id,
+            ).new(invoice_values)
+            invoice_line.invoice_id = invoice
         # Get other invoice line values from product onchange
         invoice_line._onchange_product_id()
         invoice_line_vals = invoice_line._convert_to_write(invoice_line._cache)