My module provides a field. In
hook_form_alter() I need to change only those nodes that have this field set up. (I can't operate use
hook_field_form_alter() because it does operates changes for other things than my own field.)
How can check if my field belongs to the node?
Is there an easy function to check if the field type exists in
Otherwise, if I need to look at
$form the problem is that I can't know the machine name used for the field by the admin/drupal as it looks like something like