Rails 5.1 Routes: dynamic :action parameters
<p>Rails 5.0.0.beta4 introduced a deprecation warning on routes containing dynamic :action and :controller segments: </p>

<pre><code>DEPRECATION WARNING: Using a dynamic :action segment in a route is deprecated and will be removed in Rails 5.1. 
</code></pre>

<p><a href="https://github.com/rails/rails/pull/23980">The commit message from this PR</a> states: </p>

<blockquote>
  <p>Allowing :controller and :action values to be specified via the path
  in config/routes.rb has been an underlying cause of a number of issues
  in Rails that have resulted in security releases. In light of this
  it's better that controllers and actions are explicitly whitelisted
  rather than trying to blacklist or sanitize 'bad' values.</p>
</blockquote>

<p>How would you go about "whitelisting" a set of action parameters? I have the following in my routes file, which are raising the deprecation warning: </p>

<pre><code>namespace :integrations do
  get 'stripe(/:action)', controller: 'stripe', as: "stripe"
  post 'stripe/deactivate', controller: 'stripe', action: 'deactivate'
end
</code></pre>