title: Mongoose batch nested objects insert
body: <p>I have a array of objects with deep nested arrays of objects like so:</p>
  
  <pre><code>[{
    "clause": "7",
      "section": [{
        "name": "whatever",
        "subClauses": [{
        "name": "foo",
        "details": [{
          "detail": "bar"
        }]
      }]
    }]
  }]
  </code></pre>
  
  <p>Each array has several items in it. In my Mongoose schemas, the subdocuments are individual collections, ie nested Model.schema.</p>
  
  <p>Is it possible to set up the Mongoose Schema to do a bulk <code>Model.collection.insert</code> that creates _id fields for each sub document? </p>