What I want to achieve is to add the custom attribute "instock" to all in-stock products and "outofstock" for products that out of stock right now. Why? Because I want to add those attributes to filter plugin, that doesn't support sorting by stock status

I think construction will be something like this, but I don't know how to add attributes ( Also, i`m pretty sure, that this hook woocommerce_get_availability is not the best solution to get actual statuses all the time

add_filter( 'woocommerce_get_availability', 'woocommerce_stock_availability_attributes', 1, 2);
function woocommerce_stock_availability_attributes( $availability, $_product ) {
   if ( ! $_product->is_in_stock() ) {
       //some magic stuff
   }
  return $availability;
}

What I want to achieve is to add the custom attribute "instock" to all in-stock products and "outofstock" for products that out of stock right now. Why? Because I want to add those attributes to filter plugin, that doesn't support sorting by stock status

I think construction will be something like this, but I don't know how to add attributes ( Also, i`m pretty sure, that this hook woocommerce_get_availability is not the best solution to get actual statuses all the time

add_filter( 'woocommerce_get_availability', 'woocommerce_stock_availability_attributes', 1, 2);
function woocommerce_stock_availability_attributes( $availability, $_product ) {
   if ( ! $_product->is_in_stock() ) {
       //some magic stuff
   }
  return $availability;
}

• php
• woocommerce-offtopic

1 Answer 1

WooCommerce already saves a custom metadata called _stock_status. This metadata can have these values:

instock
outofstock
onbackorder

You don't need to create your own metadata as that would be redundant and more difficult to keep in sync with WooCommerce data.