How can I copy the value of one field into another during a node edit?

I'm trying to take the value of a text field and have it populate the title field. I'm thinking I can use the Ajax framework and $form_state, but I haven't quite got it yet. Or, is there a way to do this on submission? The Title field is hidden so Ajax isn't required.

In case this helps, the scenario is this: user edits a node, fills in one text field and that value automatically populates the Title field in addition to the current field.

  • 1
    If you want to replace the title field only with some other fields content, you could use Automatic Nodetitles module (drupal.org/project/auto_nodetitle).
    – Volker
    Jan 5, 2013 at 14:59
  • Neat! I don't need the whole module, but looking at the code for the module got me just what I needed. Thanks.
    – cdmo
    Jan 5, 2013 at 15:06

1 Answer 1


@Volker's tip gave me everything I needed and it's pretty simple as it turns out.

if (!empty($form_state['values']['some_other_field'])){
  $form['title']['#value'] = $form_state['values']['some_other_field'];

Set that in a hook_form_FORM_ID_alter and it works great. The part I didn't have was the #value.

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