How to programmatically duplicate a node?

Question

I'm looking to create a copy of a webform I've made, with a new email address as the recipient.

After I load the node with node_load, can I just save it with node_save? Will that create a new node with new timestamps and ids?

How can I get the nid of the new node that has been created?

Answer 1

Just unset the node ID with unset($node->nid), and node_save() will create a new node.

The code executed from node_save() is the following one:

// Insert a new node.
$node->is_new = empty($node->nid);
// ...
if ($node->is_new) {
  _node_save_revision($node, $user->uid);
  drupal_write_record('node', $node);
  db_query('UPDATE {node_revisions} SET nid = %d WHERE vid = %d', $node->nid, $node->vid);
  $op = 'insert';
}    

The last argument of drupal_write_record() is not passed; this means the function will not update an existing database row.

Once the node object has been saved with node_save(), $node->nid contains the node ID for the newly created database row.

Answer 2

I had to post this as an answer because the system makes you have 50 reputation points before you can comment.

Anyway, in response to @koivo and his answer. I just wanted to add that for me, also unsetting the $node->vid did the trick. So my code for unsetting and saving is

// Load a node
$node = node_load(1);

// unset version and node id's
unset($node->nid);
unset($node->vid);
unset($node->path);

// Save the copy
node_save($node);

Answer 3

In D7 you have to unset the node id unset($node->nid) and the revision id unset($node->vid) both. I build a form to clone nodes of one certain type (product) having one certain term reference (with replacing that term id). Here's the final submit:

function MYMODULE_form_submit($form, &$form_state) {
    $old_tid = $form_state['values']['old_tid'];
    $new_tid = $form_state['values']['new_tid'];

    $query = new EntityFieldQuery();
    $result = $query
    ->entityCondition('entity_type', 'node')
    ->entityCondition('bundle', 'product')
    ->fieldCondition('field_some_term_reference', 'tid', $old_tid)
    ->execute();

    foreach ($result['node'] as $product) {
        $node = node_load($product->nid);
        $node->field_some_term_reference[LANGUAGE_NONE][0]['tid'] = $new_tid;
        unset($node->nid);
        unset($node->vid);
        node_save($node);
    }   
}

You might consider to resave the timestamps und $node->uid as well.

Answer 4

Try the replicate module.
I needed to easily clone and alter things on a site I did recently and found this module worked well.
Check out the replicate.api.php file to see how easy it is to use.