[IMP] mrp: cascade qty update from MO to next pickings

If a warehouse is set to a route like default 3-steps, updating the MO's
quantity to produce won't update the outgoing picking from
post-production to stock.
Since the quantity is now changed in the following pickings, no need to
put a warning in those pickings for the quantity change as their moves
quantity were automatically updated.

Task-2797359

closes odoo/odoo#86572

Signed-off-by: Arnold Moyaux <arm@odoo.com>

addons/mrp/wizard/change_production_qty.py

@@ -33,14 +33,26 @@ class ChangeProductionQty(models.TransientModel):
         modification during production would not be taken into consideration.
         """
         modification = {}
+        push_moves = self.env['stock.move']
         for move in production.move_finished_ids:
             if move.state in ('done', 'cancel'):
                 continue
             qty = (new_qty - old_qty) * move.unit_factor
             modification[move] = (move.product_uom_qty + qty, move.product_uom_qty)
-            move.write({'product_uom_qty': move.product_uom_qty + qty})
+            if self._need_quantity_propagation(move, qty):
+                push_moves |= move.copy({'product_uom_qty': qty})
+            else:
+                move.write({'product_uom_qty': move.product_uom_qty + qty})
+
+        if push_moves:
+            push_moves._action_confirm()._action_assign()
+
         return modification
 
+    @api.model
+    def _need_quantity_propagation(self, move, qty):
+        return move.move_dest_ids and not float_is_zero(qty, precision_rounding=move.product_uom.rounding)
+
     def change_prod_qty(self):
         precision = self.env['decimal.precision'].precision_get('Product Unit of Measure')
         for wizard in self:
@@ -71,9 +83,7 @@ class ChangeProductionQty(models.TransientModel):
                         else:
                             documents[key] = [value]
             production._log_manufacture_exception(documents)
-            finished_moves_modification = self._update_finished_moves(production, new_production_qty - qty_produced, old_production_qty - qty_produced)
-            if finished_moves_modification:
-                production._log_downside_manufactured_quantity(finished_moves_modification)
+            self._update_finished_moves(production, new_production_qty - qty_produced, old_production_qty - qty_produced)
             production.write({'product_qty': new_production_qty})
 
             for wo in production.workorder_ids:

addons/mrp_subcontracting/wizard/__init__.py

@@ -3,3 +3,4 @@
 
 from . import stock_picking_return
 from . import mrp_consumption_warning
+from . import change_production_qty

addons/mrp_subcontracting/wizard/change_production_qty.py

@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import api, models
+
+
+class ChangeProductionQty(models.TransientModel):
+    _inherit = 'change.production.qty'
+
+    @api.model
+    def _need_quantity_propagation(self, move, qty):
+        res = super()._need_quantity_propagation(move, qty)
+        return res and not any(m.is_subcontract for m in move.move_dest_ids)