如何在drupal节点表单中检测其编辑或添加表单？

Question

有没有一种方法可以检测正在查看的节点形式是“编辑”还是“添加新节点”形式？

Answer 1

Detect where? In a hook_alter? In a template? Somewhere else?

In general, the approach would be to get ahold of the $node object, and see if it's nid field is set. If it is, it's an edit.

Answer 2

Also you can make use of URL, if you don't want to load entire node object. When it is new node addition, then in the URL arg(0) will be "node", arg(1) will be "add", arg(2) will be "content_type_name" whereas in the case of node viewing arg(0) will be node and arg(1) will be nid(ie Numeric). This is just an alternative way to detect.

Answer 3

check these answers from drupal.stackexchange.com

for example:

function mymodule_form_node_form_alter(&$form, &$form_state) {
  $node = $form_state['node'];

  if (!isset($node->nid) || isset($node->is_new)) {
    // This is a new node.
  }
  else {
    // This is not a new node.
  }
}

or use the arg() function as previously has been indicated.

Answer 4

if ($node->is_new) {do_something_for_new_node();}