FIX mrp_usability: define sold out in bottom page

mrp_usability/models/mrp.py

@@ -3,9 +3,18 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 
-from odoo import models
+from odoo import api, models
 
 
 class MrpProduction(models.Model):
     _inherit = 'mrp.production'
     _order = 'id desc'
+
+    @api.model
+    def get_stock_move_sold_out_report(self, move):
+        lines = move.active_move_line_ids
+        qty_in_lots = sum([x.product_uom_qty for x in lines])
+        diff = round(move.product_qty - qty_in_lots, 3)
+        if diff == 0.0:
+            return ""
+        return diff