[ADD] New module <stock_quant_merge> closes #693

First upload, merge quants

README.rst

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+Quant merge
+===========
+
+This module allows to merge diferent quants if they meet some requirements.

__init__.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+# For copyright and license notices, see __openerp__.py file in root directory
+##############################################################################
+
+from . import models

__openerp__.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    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 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/.
+#
+##############################################################################
+
+{
+    "name": "Stock - Quant merge",
+    "version": "1.0",
+    "depends": [
+        "stock",
+    ],
+    "author": "OdooMRP team",
+    "website": "http://www.odoomrp.com",
+    "contributors": [
+        "Oihane Crucelaegui <oihanecrucelaegi@avanzosc.es>",
+        "Pedro M. Baeza <pedro.baeza@serviciosbaeza.com>",
+        "Ana Juaristi <ajuaristio@gmail.com>"
+    ],
+    "category": "Warehouse Management",
+    "summary": "",
+    "data": [],
+    "installable": True,
+}

models/__init__.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+# For copyright and license notices, see __openerp__.py file in root directory
+##############################################################################
+
+from . import stock

models/stock.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+# For copyright and license notices, see __openerp__.py file in root directory
+##############################################################################
+
+from openerp import models, api
+
+
+class StockQuant(models.Model):
+    _inherit = 'stock.quant'
+
+    @api.one
+    def merge_stock_quants(self):
+        if not self.reservation_id:
+            quants = self.search(
+                [('id', '!=', self.id),
+                 ('product_id', '=', self.product_id.id),
+                 ('lot_id', '=', self.lot_id.id),
+                 ('package_id', '=', self.package_id.id),
+                 ('location_id', '=', self.location_id.id),
+                 ('reservation_id', '=', False),
+                 ('propagated_from_id', '=', False)])
+            qty = cost = 0
+            for quant in quants:
+                qty += quant.qty
+                cost += quant.cost
+                quant.unlink()
+            self.cost += cost
+            self.qty += qty