title: Recursive/Tree like strong parameters?
body: <p>Is there a way of specifying arbitrarily deep strong parameters for tree structures in Rails 4? For example, how would I specify something as follows:</p>
  
  <pre><code>{
    "node": {
      "name": "parent",
      "nodes": [
        { "name": "child1", "nodes": []},
        { "name": "child2", "nodes": [
          {"name": "grandchild", "nodes": []}
        ]}
      ]
    }
  }
  </code></pre>
  
  <p>To allow each node to have a name attribute, and a nodes attribute?</p>