How can I get the data from my Wave Invoicing and Accounting Wix app to my collection?
Unfortunately, right now you can't use Wix Code to do that (but, we're always working on creating more and more APIs).
Just some other thought...does the App have an option for export data (.csv) ?
Are you still looking for how to export your wave products to wix? I was looking to do the other way around, from wix to wave, and I found a "bypass" to permit you to do so. :-)
When you click on your company name and scroll completely to the bottom, you'll find the "Data export" link.
I checked it out and... NO... it DOESN'T offer to export SPECIFICALLY your products to wix.
But... if you make an invoice for ALL of your products, even if it's a $0.00, it'll be in your invoices.
From there, you can export your data, extract the invoice from ZIP that you'll receive through a link by email, create a new database called invoices or wave invoices if you already have an invoice database, and import the CSV that you'll have extracted.
Once your database is populated, you'll need to make the Field corresponding to your products as your primary one.
Now just refer your products database to the invoices one. If you only have one field in the products database, you'll need to add a field to refer it to.
If you ever add new products to your wave, just repeat the process.