Okay sorry, use this code (I was able to test now and it works great on my end):
add_filter( 'aepc_feed_item', function( $fields, PixelCaffeine\ProductCatalog\FeedMapper $item ) {
$post = get_post( $item->get_id() );
$fields['g:description'] = $post->post_excerpt;
return $fields;
}, 10, 2 );
It should work now, but anyway, I just discovered that if some product doesn’t have the main description defined, the feed saving process will show an error (because the description is required inside the feed), even if you have changed the description value source through the previous code.
So, if it’s your case, I ask you to download the plugin from the following URL, where I added some other filters before the exception will throw, in order to fix this annoying problem: https://www.dropbox.com/s/nxwz7ib93y6wxzj/pixel-caffeine.2.0.1.hooks.zip?dl=1 (this fix will be available on next version, so you won’t do anything to keep the fix)
After downloaded, replace the plugin with the one you have on your website and use this code instead of previous:
add_filter( 'aepc_feed_item_description', function( $description, PixelCaffeine\ProductCatalog\FeedMapper $item ) {
$post = get_post( $item->get_id() );
$description = $post->post_excerpt;
return $description;
}, 10, 2 );
Note that in this way all products must have an excerpt defined, otherwise the saving process will show you an error.
