Пример #1
0
 /**
  * Loads a database result, either as a new record for this model, or as
  * an iterator for multiple rows.
  *
  * @chainable
  * @param  bool $multiple Return an iterator or load a single row
  * @return ORM|Database_Result
  */
 protected function _load_result($multiple = FALSE)
 {
     $this->_db_builder->from(array($this->_table_name, $this->_object_name));
     if ($multiple === FALSE) {
         // Only fetch 1 record
         $this->_db_builder->limit(1);
     }
     // Select all columns by default
     $this->_db_builder->select_array($this->_build_select());
     if (!isset($this->_db_applied['order_by']) and !empty($this->_sorting)) {
         foreach ($this->_sorting as $column => $direction) {
             if (strpos($column, '.') === FALSE) {
                 // Sorting column for use in JOINs
                 $column = $this->_object_name . '.' . $column;
             }
             $this->_db_builder->order_by($column, $direction);
         }
     }
     if ($multiple === TRUE) {
         // Return database iterator casting to this object type
         $result = $this->_db_builder->as_object(get_class($this))->execute($this->_db);
         $this->reset();
         return $result;
         //直接返回资源数组.
     } else {
         // Load the result as an associative array
         $result = $this->_db_builder->as_assoc()->execute($this->_db);
         $this->reset();
         if ($result->count() === 1) {
             // Load object values
             $this->_load_values($result->current());
         } else {
             // Clear the object, nothing was found
             $this->clear();
         }
         return $this;
     }
 }