I’ve added a custom metafield to “Customer metafield definitions” (customer.metafields.custom.childs_name) and hoped to modify the newsletter-form.liquid code to accept “Nickname” along with first_name and last_name.
However, the below is not recording the value in the customer entry:
I’ve also tried name=“customer[custom][nick_name]” & name=“contact[nick_name]” with not effect.
@CraigJones if you’re still looking for a solution for this, you might wanna check FieldsRaven app, it’s a niche app for theme developers, that makes it possible to create/update metafields from the storefront.