/**
  * Called by $this->load() to populate data into $this->persistent->rec_data
  *
  * Subclasses may override this method to tune load() behavior, e.g.
  * to load data lazily by field name passed in $field_or_db_row.
  * Subclasses overriding this should also call parent::doLoad() since the base class
  * uses it to load data from $this->m model.
  *
  * @param array $field_or_db_row see $this->load()
  * @throws waException
  */
 protected function doLoad($field_or_db_row = null)
 {
     // load from array?
     if (is_array($field_or_db_row)) {
         $fields = $this->m->getMetadata();
         $nulls = array_fill_keys(array_keys($fields), null);
         $this->persistent->setAll(array_intersect_key($field_or_db_row, $fields) + $nulls);
         return;
     }
     // requested field already loaded?
     if ($field_or_db_row) {
         // check if can be loaded from $this->m model
         if (!array_key_exists($field_or_db_row, $this->m->getMetadata())) {
             return;
         }
     } else {
         $loaded = true;
         foreach ($this->m->getMetadata() as $f => $v) {
             if (!$this->persistent->keyExists($f)) {
                 $loaded = false;
                 break;
             }
         }
         if ($loaded) {
             return;
         }
     }
     // load from model
     $row = $this->m->getById($this->id);
     if (!$row) {
         throw new waException('No record found in ' . $this->m->getTableName() . ' for id=' . $this->id, 404);
     }
     $this->persistent->setAll($row);
 }
 public function getById($value)
 {
     $data = parent::getById($value);
     if ($data && $data['system_id'] && wa()->appExists($data['system_id'])) {
         $app = wa()->getAppInfo($data['system_id']);
         $data['name'] = $app['name'];
         $data['icon'] = wa()->getRootUrl(true) . $app['icon'][16];
     }
     return $data;
 }
 /**
  * Returns data from table record with specified value in id field ($this->id).
  *
  * @param int|array $value Field value or array of values
  * @return array|null
  */
 public function getById($value)
 {
     if ($cache = wa()->getCache()) {
         $cache_key = 'block_' . $value;
         $result = $cache->get($cache_key);
         if (!$result) {
             $result = parent::getById($value);
             if ($result) {
                 $cache->set($cache_key, $result, 86400);
             }
         }
         return $result;
     } else {
         return parent::getById($value);
     }
 }