Pods Caching Examples

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<?php

define('CACHE_DURATION',   1800); // 30 mins
define('PODS_CACHE_GROUP', 'pods_plugin');

// Example of pods->find() method with database caching
public function find ($params, $limit = 15, $where = null, $sql = null) {
    // Cache key is combo of current pod id, and query string of arguments
    // May want to prefix with pods_plugin?
    $findPodCacheKey = $this->id . http_build_query(array($params, $limit, $where, $sql));

    // Return a cached value from DB right away if exists
    if ($cachedFind = get_transient($findPodCacheKey)) {
         return $cachedFind;
    }

    // Do normal find methods

    set_transient($findPodCacheKey, $findResults, CACHE_DURATION);    

    return $findResults;
}

// Example of pods->find method with object caching
public function find ($params, $limit = 15, $where = null, $sql = null) {
    $findPodCacheKey = $this->id . http_build_query(array($params, $limit, $where, $sql));

    // Return a cached value from object cache if it exists
    if ($cachedFind = wp_cache_get($findPodCacheKey, PODS_CACHE_GROUP)) {
         return $cachedFind;
    }

    // Do normal find methods

    // Noteworthy: wp_cache_set is essentially an upsert, wp_cache_add does exist
    // with the same arguments
    wp_cache_set($findPodCacheKey, $findResults, PODS_CACHE_GROUP, CACHE_DURATION);    

    return $findResults;
}


public function clearAllPodsCache() {
   // Flush all object caching
   // Unfortunately you can't delete cache on a per group basis, so ALL object caching would have to be cleared
   wp_cache_flush();

   // Alternatively, if we wanted to store existing cache keys we could delete each one individually via:
   // wp_cache_delete(id, PODS_CACHE_GROUP)

   // Transient caching can only be deleted on a per key-name basis
   // So perhaps we should store all transients starting with the pods cache group,
   // so we can do a like query to remove all of ours.
}