title: CakePHP : Validation message not displaying
body: <p>I'm new to cakePHP and I've made a simple form following some tutorial. On this html form I've used validation. Now the problem is that the validation is working but the message is not displaying what I want it to display. I tried the code below.</p>
  
  <p><strong>Model</strong></p>
  
  <pre><code> public $validate = array(
          'title' =&gt; array(
              'title_required' =&gt; array(
                  'rule' =&gt; 'notEmpty',
                  'message' =&gt; 'This is required field'
              ),
              'title_unique' =&gt; array(
                  'rule' =&gt; 'isUnique',
                  'message' =&gt; 'This should be unique title'
              )
          )
      );
  </code></pre>
  
  <p><strong>Controller</strong></p>
  
  <pre><code>public function add() {
          if ($this-&gt;request-&gt;data) {
              if ($this-&gt;Post-&gt;save($this-&gt;request-&gt;data)) {
                  $this-&gt;Session-&gt;setFlash('Post has been added successfully');
                  $this-&gt;redirect(array('action' =&gt; 'index'));
              } else {
                  $this-&gt;Session-&gt;setFlash('Error occured, Please try agan later!');
              }
          }
      }
  </code></pre>
  
  <p><strong>View</strong></p>
  
  <pre><code>&lt;h2&gt;Add New Post&lt;/h2&gt;
  &lt;?php
  echo $this-&gt;Form-&gt;create('Post', array('action'=&gt;'add'));
  echo $this-&gt;Form-&gt;input('title');
  echo $this-&gt;Form-&gt;input('body');
  echo $this-&gt;Form-&gt;end('Create Post');
  ?&gt;
  </code></pre>
  
  <p>The validation error which I've seen is not the message I mentioned in my controller.</p>
  
  <p><img src="https://i.stack.imgur.com/6L23u.jpg" alt="enter image description here"></p>