[FIX] fix the problem of partial payment and purchase invoice will go to paid status even if the price is 0 in product.

bzr revid: nco@tinyerp.com-20121204100106-64i2borf2dyj8jt8

addons/account/account_invoice.py

@@ -674,6 +674,9 @@ class account_invoice(osv.osv):
         return super(account_invoice, self).copy(cr, uid, id, default, context)
 
     def test_paid(self, cr, uid, ids, *args):
+        for inv in self.browse(cr, uid, ids):
+            if inv.amount_total == 0.0:
+                return True
         res = self.move_line_id_payment_get(cr, uid, ids)
         if not res:
             return False
@@ -851,6 +854,8 @@ class account_invoice(osv.osv):
         if context is None:
             context = {}
         for inv in self.browse(cr, uid, ids, context=context):
+            if inv.amount_total == 0.0:
+                continue
             if not inv.journal_id.sequence_id:
                 raise osv.except_osv(_('Error!'), _('Please define sequence on the journal related to this invoice.'))
             if not inv.invoice_line:
@@ -1037,6 +1042,8 @@ class account_invoice(osv.osv):
         self.write(cr, uid, ids, {})
 
         for obj_inv in self.browse(cr, uid, ids, context=context):
+            if obj_inv.amount_total == 0.0:
+                continue
             id = obj_inv.id
             invtype = obj_inv.type
             number = obj_inv.number

addons/account_voucher/account_voucher.py

@@ -596,7 +596,7 @@ class account_voucher(osv.osv):
                 This function returns True if the line is considered as noise and should not be displayed
             """
             if line.reconcile_partial_id:
-                sign = 1 if ttype == 'receipt' else -1
+                sign = 1 if ttype in ['payment', 'receipt'] else -1
                 if currency_id == line.currency_id.id:
                     if line.amount_residual_currency * sign <= 0:
                         return True