title: Cakephp Model Validation decimal value
body: <p>I am trying to validate a decimal value, i do use naturalNumber but did not recognize a value as 1,00 as greater than zero.</p>
  
  <p>How can i work with decimal values using Cakephp 2 validation ? (0,01) would be accepted!</p>
  
  <p>I try : </p>
  
  <pre><code>$this-&gt;loadModel('SomeModel');    
  $data = array(
      'decimal_value' =&gt; '0,01',
  ); 
  
  $this-&gt;SomeModel-&gt;save($data);
  
  class SomeModel extends AppModel {
      public $validate = array(
              'naturalNumber' =&gt; array(
                  'rule' =&gt; 'naturalNumber',
                  'message' =&gt; 'Value must be grater than 0',
                  'required' =&gt; true
              )
          )
      );
  } 
  </code></pre>