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The relationships are set for each product. They are all “Simple” products. I’m using a ACF Relationship field to create custom variations.
The Relationship field is also set up to be bidirectional:
// Creating Bidirectional relationship // for products to create variations function bidirectional_acf_update_value( $value, $post_id, $field ) { // vars $field_name = $field['name']; $field_key = $field['key']; $global_name = 'is_updating_' . $field_name; // bail early if this filter was triggered from the update_field() function called within the loop below // - this prevents an inifinte loop if( !empty($GLOBALS[ $global_name ]) ) return $value; // set global variable to avoid inifite loop // - could also remove_filter() then add_filter() again, but this is simpler $GLOBALS[ $global_name ] = 1; // loop over selected posts and add this $post_id if( is_array($value) ) { foreach( $value as $post_id2 ) { // load existing related posts $value2 = get_field($field_name, $post_id2, false); // allow for selected posts to not contain a value if( empty($value2) ) { $value2 = array(); } // bail early if the current $post_id is already found in selected post's $value2 if( in_array($post_id, $value2) ) continue; // append the current $post_id to the selected post's 'related_posts' value $value2[] = $post_id; // update the selected post's value (use field's key for performance) update_field($field_key, $value2, $post_id2); } } // find posts which have been removed $old_value = get_field($field_name, $post_id, false); if( is_array($old_value) ) { foreach( $old_value as $post_id2 ) { // bail early if this value has not been removed if( is_array($value) && in_array($post_id2, $value) ) continue; // load existing related posts $value2 = get_field($field_name, $post_id2, false); // bail early if no value if( empty($value2) ) continue; // find the position of $post_id within $value2 so we can remove it $pos = array_search($post_id, $value2); // remove unset( $value2[ $pos] ); // update the un-selected post's value (use field's key for performance) update_field($field_key, $value2, $post_id2); } } // reset global varibale to allow this filter to function as per normal $GLOBALS[ $global_name ] = 0; // return return $value; } add_filter('acf/update_value/name=product_variations', 'bidirectional_acf_update_value', 10, 3); -
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