[FIX] mrp_operations_extension: update qty erases operations

mrp_operations_extension/wizard/__init__.py

@@ -2,5 +2,6 @@
 ##############################################################################
 # For copyright and license notices, see __openerp__.py file in root directory
 ##############################################################################
+from . import change_production_qty
 from . import mrp_work_order_produce
 from . import workcenter_line_finish

mrp_operations_extension/wizard/change_production_qty.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Oihane Crucelaegui - AvanzOSC
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from openerp import _, api, models
+
+
+class ChangeProductionQty(models.TransientModel):
+    _inherit = 'change.production.qty'
+
+    @api.multi
+    def change_prod_qty(self):
+        """
+        Changes the Quantity of Product.
+        """
+        record_id = self.env.context.get('active_id', False)
+        assert record_id, _('Active Id not found')
+        prod_obj = self.env['mrp.production']
+        bom_line_obj = self.env['mrp.bom.line']
+        uom_obj = self.env['product.uom']
+        res = super(ChangeProductionQty, self).change_prod_qty()
+        for wiz_qty in self:
+            prod = prod_obj.browse(record_id)
+            for move in prod.move_lines:
+                bom_point = prod.bom_id
+                factor = uom_obj._compute_qty(prod.product_uom.id,
+                                              prod.product_qty,
+                                              bom_point.product_uom.id)
+                product_details, workcenter_details = (
+                    bom_point._bom_explode(prod.product_id,
+                                           factor / bom_point.product_qty, []))
+                for r in product_details:
+                    bom_line = bom_line_obj.browse(r['bom_line'])
+                    workorder = prod.workcenter_lines.filtered(
+                        lambda x: (x.routing_wc_line == bom_line.operation))
+                    if workorder:
+                        move.work_order = workorder
+        return res