title: How to update a object in mongodb via mongoose?
body: <p>I have mongoose schema as:</p>
  
  <pre><code>var Organization = new Schema({
    name: String,
    address: {
      street : String,
      city: String
    }
  }, { collection: 'organization' });
  </code></pre>
  
  <p>How do I update only street part of address for an organization via mongoose?</p>