moved the special stuff into the inherited view

InvenTree/order/views.py

@@ -1586,3 +1586,11 @@ class LineItemPricing(PartPricing):
                 return None
         else:
             return None
+
+    def get_quantity(self):
+        """ Return set quantity in decimal format """
+        qty = Decimal(self.request.GET.get('quantity', 1))
+        if qty == 1:
+            return Decimal(self.request.POST.get('quantity', 1))
+        return qty
+

InvenTree/part/views.py

@@ -1959,19 +1959,7 @@ class PartPricing(AjaxView):
 
     def get_quantity(self):
         """ Return set quantity in decimal format """
-
+        return Decimal(self.request.POST.get('quantity', 1))
-        # check POST
-        qty = self.request.POST.get('quantity', None)
-
-        # check GET
-        if not qty:
-            qty = self.request.GET.get('quantity', None)
-
-        # nothing found: return 1
-        if not qty:
-            return Decimal(1)
-        # return as decimal
-        return Decimal(qty)
 
     def get_part(self):
         try: