title: Serializing JSON array of foreign keys using sequelize
body: <p>If I have a JSON object as follows</p>
  
  <pre><code>{
   name: "John Smith",
   tags: [1, 2, 3]
  }
  </code></pre>
  
  <p>Each number in the tags array above is a foreign key associated with a Tag record. </p>
  
  <p>What's the most efficient way of creating this record using sequelize?</p>