Update Metafield by counting number of purchased products

[jemsuede]

Hi everyone,

I am fairly new to liquid so I hope this will be a quick answer for someone. I am looking to do the following in Shopify flow.

I currently have a metafield that will be updated every time a customer purchases an item. For instance, they have purchased 10 items in the past and have a new order of 10, the Shopify Flow will update the metafield to 20.

This is currently where I am stuck. As I cannot seem to find the the current metafield value before adding the new order quantity.

[paul_n]

You can’t access metafields that way in Flow yet. Storefront does something special to fetch metafields values by namespace. In Flow, you loop over order.customer.metafields … FYI if you click add variable and choose the metafield value it will show you the loop part.

Another way to do it is using where:

{% assign my_mf = order.customer.metafields | where: “namespace”, “custom” | where: “key”, “pledgedcards” | first %}
{{ my_mf.value }}