title: Modify request within controller
body: <p>In Symfony, it is easy to get the request within a controller:</p>
  
  <pre><code>$request = $this-&gt;container-&gt;get('request');
  </code></pre>
  
  <p>Now, I suppose this is a bad practice...but is it possible to modify that request, meaning, for example modify the value of a hidden form field before binding it:</p>
  
  <pre><code>$requestModifiedWithNewValueForHiddenFormField = $request;
  // modify the request
  // ....
  $this-&gt;bind($requestModifiedWithNewValueForHiddenFormField);
  </code></pre>
  
  <p>I suppose I should be using dataTransformer but in this case, I'd like to have your opinion on modifying a request...</p>