Add ability to put a key in ctx to disable generation of a price history line

product_usability/product.py

@@ -42,6 +42,7 @@ class ProductTemplate(orm.Model):
         retrieve the cost of a product template for a given date'''
         if context is None:
             context = {}
+        if not context.get('dont_create_price_history'):
             price_history_obj = self.pool['product.price.history']
             user_company = self.pool['res.users'].browse(
                 cr, uid, uid, context=context).company_id.id