Use the BoM output unit to request the quantity to produce

This ensures that the output quantity of the production is not floored such
that the production supply does not enter in an infinite loop.

Closes #14175

modules/stock_supply_production/production.py

@@ -155,6 +155,7 @@ class Production(metaclass=PoolMeta):
         Return the value of the production request.
         """
         pool = Pool()
+        UoM = pool.get('product.uom')
         Date = pool.get('ir.date')
         with Transaction().set_context(company=company.id):
             today = Date.today()
@@ -162,13 +163,22 @@ class Production(metaclass=PoolMeta):
             date = today
         else:
             date -= datetime.timedelta(1)
+        pbom = product.get_bom(bom_pattern)
         unit = product.default_uom
+        if pbom:
+            for output in pbom.bom.outputs:
+                if output.product == product:
+                    # Use output unit to ensure the quantity requested is
+                    # not floored to 0
+                    unit = output.unit
+                    quantity = UoM.compute_qty(
+                        product.default_uom, quantity, unit, round=False)
+                    break
         quantity = unit.ceil(quantity)
         if order_point:
             origin = str(order_point)
         else:
             origin = 'stock.order_point,-1'
-        pbom = product.get_bom(bom_pattern)
         return cls(
             planned_date=date,
             company=company,