title: Disable Jinja template caching for certain filter
body: <p>We have a custom Jinja filter that we use for creating cache busting URL for our Javascript and CSS resources. We now noticed that in our production environment the final, compiled templates get cached. This results in a problem since our template filter sometimes doesn't create a new URL (i.e. when the template wasn't changed but the Javascript was).</p>
  
  <p>Is there a way to force Jinja to reevaluate a certain filter every time and don't cache the result?</p>
  
  <p><strong>Edit 1</strong>: We are using constant inputs (name of the file) to the filter. </p>