Save many metafields with a single request

There does not seem to be a way to attach metafields locally, and then simply save the product with the metafields along with it. I'm forced to use add_metafields() or Metafield().save(), both of which adds a single metafield per API call. This is very slow.

If I take a product with 50 metafields, and save it as a new product, it saves almost instantly, like so:

p = shopify.Product.find()[0]
print len(p.metafields())
> 50
p.id = None
p.images = None
p.save()

How can I attach metafields to a product in the same way they are attached when they are fetched?

Inizia tracciando Product.save(), add_metafields() e Metafield().save() per capire come vengono rappresentati e persistiti i metafields recuperati. Il lavoro è completato quando i metafields collegati localmente possono essere salvati con un nuovo prodotto in un'unica richiesta API, con una copertura del caso segnalato con più metafields.