Deprecation Warning About Mass Assignment Rails 4.0
<p>I am upgrading an app to 4.0 and using ruby-2.2.5. I am down to a couple of Deprecation Warnings, which appear when I run >> bundle exec rake.  </p>

<p>One of the warnings:</p>

<pre><code>DEPRECATION WARNING: Model based mass assignment security has been extracted out of Rails into a gem. 
Please use the new recommended protection model for params or add `protected_attributes` to your Gemfile to use the old one.

To disable this message remove the `whitelist_attributes` option from your `config/application.rb` file 
and any `mass_assignment_sanitizer` options from your `config/environments/*.rb` files.

See http://guides.rubyonrails.org/security.html#mass-assignment for more information.
</code></pre>

<p>I understand what this about and I have gone through all my models looking for and removing 'attr_accessible'.  I have gone through all my controllers and added a method for strong_params, which I call in my 'create' and 'update' actions.  We are not using 'whitelist_attributes' or any 'mass_assignment_sanitizer' options. And, all my spec tests are passing.</p>

<p>My Questions is, Would this warning be just a standard output or would it be from rails seeing something I am not?  Ideas?</p>

<p>Much appreciated</p>