title: How do I pass an array to fields_for in Rails?
body: <p>I want to use <code>fields_for</code> on a subset of records in an association.</p>
  
  <p>I have a <code>Month</code> model, which <code>has_many :payments</code>.</p>
  
  <p>But in my form in my view I only want to have <code>fields_for</code> some of those payments. For example:</p>
  
  <pre><code>- fields_for @month.payments.large
  </code></pre>
  
  <p>This doesn't work.</p>
  
  <p>Can I pass a set of records to <code>fields_for</code>, rather than the usual symbol (<code>fields_for :payments</code>) approach?</p>