[ADD] module account_balance_line

account_balance_line/account_move_line.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+#    Author: Vincent Renaville (Camptocamp)
+#    Copyright 2010-2014 Camptocamp SA
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+from openerp.osv import osv, fields
+
+
+class account_move_line(osv.Model):
+    _inherit = "account.move.line"
+
+    def _line_balance(self, cr, uid, ids, field, arg, context=None):
+        res = {}
+        move_lines = self.read(cr, uid, ids,
+                               ['debit', 'credit'],
+                               context=context)
+
+        for line in move_lines:
+            res[line['id']] = line['debit'] - line['credit']
+        return res
+
+    _columns = {
+        'line_balance': fields.function(
+            _line_balance, method=True,
+            string='Balance',
+            store=True),
+    }