Re: Get old record in beforeSave when updating (doing a $this->find() inside beforeSave callback)

On Saturday, 29 June 2013 19:53:49 UTC+2, Vanja Dizdarević wrote:

When updating a row, I wish to read the "old" data before saving the current record.

Here's a simplified example:

Controller code:

$this->User->save(['id' => 3, 'username' => 'a-new-username']);

Model code:

class User extends AppModel {

   public function beforeSave($options){

       //is it an update?

       if (isset($this->data[$this->alias][$this->primaryKey])) {
            //read record

            $oldData = $this->findById($this->data[$this->alias][$this->primaryKey]);
              //^^^ here's the problem! ^^^

            if ($oldData[$this->alias]['username_update_count'] >= 3){

               return false;

            }

            else {

              $this->data[$this->alias]['username_update_count'] = $oldData[$this->alias]['username_update_count'] + 1;

            }

       }

   }

}

The problem is, that $this->findById (or any other READ operation) fills the current $this->data with the read data

If by "READ operation" you mean a find call (you refer to findById - a find) - that is quite simply not true.

If you call the method Model::read however, it will populate $this->data.

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