2.0 "book" is wrong for "afterFind" callback

The 2.0 book documentation for "afterFind" is either wrong or it's missing information. The example code...

public function afterFind($results, $primary = false) {      foreach ($results as $key => $val) {          if (isset($val['Event']['begindate'])) {              $results[$key]['Event']['begindate'] = $this->dateFormatAfterFind($val['Event']['begindate']);          }      }      return $results;  }

...does not work and generates and error.

I added this code to my model and changed the 'Event' index to my model name 'Post' and when you run you get a repeated "index 'Post' not found".

What requirement is missing from the documentation?

Thanks a lot for your help :-)

Mark

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