title: CakePHP - remove data from $this->request->data
body: <p>I have a edit page for my ExpenseClaim model. The edit page lists all the related Expenses belonging to that ExpenseClaim in a form so users can edit the expenses. I have a X next to each expense so they can delete it if needed. This X just removes the rows fields from the DOM using JS.</p>
  
  <p>When the save button is pressed I'd like any removed rows to be deleted from the Expense table but as $this->request->data isnt changing (the changes are only in the DOM) they don't get deleted. Any edited data does change but not removed data.</p>
  
  <p>I thought about using a postLink but as that creates its own form and I'm already in a form I cant.</p>
  
  <p>So how can I get cake to recognise the changed data? Or am I going about it the wrong way?</p>
  
  <p>Thanks in advance</p>