title: Is it good approach assigning associated data in to variable rather than calling the association again and again
body: <p>I have queries like</p>
  <pre><code>@client.orders.last
  @client.orders.pluck(:order_date)
  @client.orders.where(delivered?: true)
  </code></pre>
  <p>As above <code> @client.orders</code> is repeated 3 times .So is it good approach to assign <code> @client.orders</code> to another variable and use that variable.
  example</p>
  <pre><code>client_orders = @client.orders
  client_orders.last
  client_orders.pluck(:order_date)
  client_orders.where(delivered?: true)
  </code></pre>