Filter product add-ons – adding fields programmatically

You can filter product add-ons after you’ve added them in the product or global settings. This is particularly useful if you have complex select fields to add. Here’s an example from Henrik Jacobsen showing how to insert a list of countries:

Using this code, you can create a select field for your product. Assign one option and call it ‘countrylist’.

When the filter runs, it will look for any select fields whose first option is ‘countrylist’ then replace the options with a list of countries. You can extend this to whatever list you need.

Specifying child products via SKUs and ACF

This method could be helpful if you want to import fields via CSV, e.g. via WP All Import. Instead of specifying child products in the ‘Products’ field itself, you can use Advanced Custom Fields to specify the SKUs of your child products.

Step 1

Install and activate Advanced Custom Fields and create a textarea field with the name child_product_skus that appears on Products.

Step 2

In the product where you wish the child products to appear, create a field using Add-Ons Ultimate. The field type should be ‘Products’ and you can choose whatever layout or other parameters you like. But you can leave the ‘Child products’ setting empty.

Step 3

On the same product, your ACF field should appear. Just enter the SKUs of your child products as a comma-separated list, e.g. Woo-beanie-logo, Woo-tshirt-logo, woo-long-sleeve-tee:

Step 4

Finally, add this snippet:

Here’s how to add the snippet: https://pluginrepublic.com/documentation/how-to-add-a-code-snippet-to-your-site/.

The snippet will now find the products with the specified SKUs and populate the ‘Products’ field accordingly.