add account_invoice_criteria patch

issue6253.diff

@@ -0,0 +1,28 @@
+diff -r 6c85f394741c invoice.py
+--- a/modules/account_invoice/invoice.py	Wed Jan 24 20:14:28 2018 +0100
++++ b/modules/account_invoice/invoice.py	Wed Feb 07 15:39:49 2018 +0100
+@@ -1020,6 +1020,11 @@
+             invoice.number = invoice.get_next_number()
+         cls.save(invoices)
+
++    def invoice_type_criteria(self):
++        if self.base_amount < 0:
++            return '_credit_note'
++        return '_invoice'
++
+     def get_next_number(self, pattern=None):
+         pool = Pool()
+         Sequence = pool.get('ir.sequence.strict')
+@@ -1040,11 +1045,7 @@
+         pattern.setdefault('fiscalyear', fiscalyear.id)
+         pattern.setdefault('period', period.id)
+         invoice_type = self.type
+-        if (all(l.amount < 0 for l in self.lines if l.product)
+-                and self.total_amount < 0):
+-            invoice_type += '_credit_note'
+-        else:
+-            invoice_type += '_invoice'
++        invoice_type += self.invoice_type_criteria()
+
+         for invoice_sequence in fiscalyear.invoice_sequences:
+             if invoice_sequence.match(pattern):

series

@@ -0,0 +1 @@
+issue6253.diff # add invoice type criteria