Add patch for speed up invoice posting process

invoice_speedup.diff

@@ -0,0 +1,73 @@
+diff -r 60fd69f732c6 trytond/trytond/modules/account_invoice/invoice.py
+--- a/trytond/trytond/modules/account_invoice/invoice.py	Mon Mar 02 12:40:52 2015 +0100
++++ b/trytond/trytond/modules/account_invoice/invoice.py	Tue Jul 07 09:25:19 2015 +0200
+@@ -995,7 +995,6 @@
+
+         accounting_date = self.accounting_date or self.invoice_date
+         period_id = Period.find(self.company.id, date=accounting_date)
+-
+         move, = Move.create([{
+                     'journal': self.journal.id,
+                     'period': period_id,
+@@ -1003,9 +1002,8 @@
+                     'origin': str(self),
+                     'lines': [('create', move_lines)],
+                     }])
+-        self.write([self], {
+-                'move': move.id,
+-                })
++        self.move = move
++
+         return move
+
+     def set_number(self):
+@@ -1037,11 +1035,12 @@
+         with Transaction().set_context(
+                 date=self.invoice_date or Date.today()):
+             number = Sequence.get_id(sequence.id)
++            self.number = number
+             vals = {'number': number}
+             if (not self.invoice_date
+                     and self.type in ('out_invoice', 'out_credit_note')):
+                 vals['invoice_date'] = Transaction().context['date']
+-        self.write([self], vals)
++                self.invoice_date = Transaction().context['date']
+
+     @classmethod
+     def check_modify(cls, invoices):
+@@ -1364,10 +1363,14 @@
+     @ModelView.button
+     @Workflow.transition('validated')
+     def validate_invoice(cls, invoices):
++        to_write = []
+         for invoice in invoices:
+             if invoice.type in ('in_invoice', 'in_credit_note'):
+                 invoice.set_number()
+                 invoice.create_move()
++                to_write.extend(([invoice], invoice._save_values))
++        if to_write:
++            cls.write(*to_write)
+
+     @classmethod
+     @ModelView.button
+@@ -1375,14 +1378,17 @@
+     def post(cls, invoices):
+         Move = Pool().get('account.move')
+
+-        moves = []
++        to_write = []
+         for invoice in invoices:
+             invoice.set_number()
+-            moves.append(invoice.create_move())
++            invoice.create_move()
++            to_write.extend(([invoice], invoice._save_values))
++        if to_write:
++            cls.write(*to_write)
+         cls.write([i for i in invoices if i.state != 'posted'], {
+                 'state': 'posted',
+                 })
+-        Move.post([m for m in moves if m.state != 'posted'])
++        Move.post([i.move for i in invoices if i.move.state != 'posted'])
+         for invoice in invoices:
+             if invoice.type in ('out_invoice', 'out_credit_note'):
+                 invoice.print_invoice()

series

@@ -56,3 +56,4 @@ issue13181002_1.diff
 issue13211002_190001.diff
 issue17281002_20001.diff
 issue20301003_1.diff
+invoice_speedup.diff