Optimistic cache id on cold miss

[jasonmarlin]

I don't know if it's helpful for anyone else, but my architecture is such that it's useful for me to get the eventual object cache id on a first cold miss. Then my frontend app can hit the cache directly without bootstrapping WP.

I doubt it would be super useful as a core feature since I'm betting on the key being set, but it took me some time to figure out, so thought I'd share how I got cacheId wired into the first cold miss:

/**
 * Filter to add cache key to GraphQL responses on cold hits.
 */
add_filter(
    'graphql_request_results',
    function ($result, $schema, $operation_name, $query, $variables, $request, $query_id) {

        // Only handle objects (cold hits) - warm hits already have the key from the plugin
        if (!is_object($result) || !property_exists($result, 'extensions')) {
            return $result;
        }

        // Check if cache key is already present (warm hit)
        if (isset($result->extensions['graphqlSmartCache']['graphqlObjectCache']['cacheKey'])) {
            return $result;
        }

        // Only proceed if we have the cache extension structure and the Query class
        if (
            !isset($result->extensions['graphqlSmartCache']['graphqlObjectCache']) ||
            !class_exists('\WPGraphQL\SmartCache\Cache\Query')
        ) {
            return $result;
        }

        // Use the plugin's own method to generate the cache key
        $query_cache = new \WPGraphQL\SmartCache\Cache\Query();
        $cache_key = $query_cache->build_key($query_id, $query, $variables, $operation_name);

        if ($cache_key) {
            $result->extensions['graphqlSmartCache']['graphqlObjectCache']['cacheKey'] = $cache_key;
        }

        return $result;
    },
    20, // Run after the plugin's filter at priority 10
    7
);

And to @jasonbahl - just wow - I've been tinking w/wp-graphql and the ecosystem for a while and finally digging in on a project for the first time. What an incredible bit of work sir - well done!