From 9696b43f6c92fb58a5c43bc455088b3ddeb4b8e5 Mon Sep 17 00:00:00 2001
From: Numerigraphe - Lionel Sausin <ls@numerigraphe.fr>
Date: Wed, 29 Feb 2012 12:08:20 +0100
Subject: [PATCH] [IMP] Warn if the quantity is decreased in the stock moves

bzr revid: ls@numerigraphe.fr-20120229110820-7ods08ps2rm0j03o
---
 addons/stock/stock.py | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index 5b8edce471d..2470ec362d7 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -1780,19 +1780,30 @@ class stock_move(osv.osv):
         result = {
                   'product_uos_qty': 0.00
           }
+        warning = {}
 
         if (not product_id) or (product_qty <=0.0):
             return {'value': result}
 
         product_obj = self.pool.get('product.product')
         uos_coeff = product_obj.read(cr, uid, product_id, ['uos_coeff'])
+        
+        # Warn if the quantity was decreased 
+        for move in self.read(cr, uid, ids, ['product_qty']):
+            if product_qty < move['product_qty']:
+                warning.update({
+                   'title': _('Warning: No Back Order'),
+                   'message': _("By changing the quantity here, you accept the "
+                                "new quantity as complete: OpenERP will not "
+                                "automatically generate a Back Order.") })
+                break
 
         if product_uos and product_uom and (product_uom != product_uos):
             result['product_uos_qty'] = product_qty * uos_coeff['uos_coeff']
         else:
             result['product_uos_qty'] = product_qty
 
-        return {'value': result}
+        return {'value': result, 'warning': warning}
 
     def onchange_uos_quantity(self, cr, uid, ids, product_id, product_uos_qty,
                           product_uos, product_uom):
@@ -1806,19 +1817,29 @@ class stock_move(osv.osv):
         result = {
                   'product_qty': 0.00
           }
+        warning = {}
 
         if (not product_id) or (product_uos_qty <=0.0):
             return {'value': result}
 
         product_obj = self.pool.get('product.product')
         uos_coeff = product_obj.read(cr, uid, product_id, ['uos_coeff'])
+        
+        # Warn if the quantity was decreased 
+        for move in self.read(cr, uid, ids, ['product_uos_qty']):
+            if product_uos_qty < move['product_uos_qty']:
+                warning.update({
+                   'title': _('Warning: No Back Order'),
+                   'message': _("By changing the quantity here, you accept the "
+                                "new quantity as complete: OpenERP will not "
+                                "automatically generate a Back Order.") })
+                break
 
         if product_uos and product_uom and (product_uom != product_uos):
             result['product_qty'] = product_uos_qty / uos_coeff['uos_coeff']
         else:
             result['product_qty'] = product_uos_qty
-
-        return {'value': result}
+        return {'value': result, 'warning': warning}
 
     def onchange_product_id(self, cr, uid, ids, prod_id=False, loc_id=False,
                             loc_dest_id=False, address_id=False):