How do I integrate a nodes edit form on a page?

Question

I would like to integrate a nodes edit form on a page. For example, I want to alter the node with ID id equal to 1.
I know there are a lot of ways to achieve this, but I can imagine there is only one right way.

I am having some troubles with my form. After certain time, the edit form shows values from different nodes: some from this, some from the other, etc. I really don't know why.

Answer 1

Use drupal_get_form(NODETYPE . '_node_form', NODEOBJECT); as callback in your custom menu item.

The original node module callback for menu item 'node/%node/edit' is located in the node.pages.inc file:

/**
 * Menu callback; presents the node editing form.
 */
function node_page_edit($node) {
  $type_name = node_type_get_name($node);
  drupal_set_title(t('<em>Edit @type</em> @title', array('@type' => $type_name, '@title' => $node->title)), PASS_THROUGH);
  return drupal_get_form($node->type . '_node_form', $node);
}