Node title validation

Node tile will become a field in Drupal8.
There is a title field module in Drupal 7.
Node title do not have a seperate config page in Drupal 7. I need write a seperate module for it in Drupal 7.

Support property validation since 7.x-2.1, which could solve such issue very well.

I can't see the title field of the node to make the rules

I don't see a way to select the property either.

You need enable property validation module, it is a seperate module .

Ah I did not see that it needed an extra module enabled because I did not realize it was part of the same set of modules. I would suggest renaming the module to "Field Validation Property Validation" so that it shows up with the other Field Validation module suite. I opened a separate issue for that though. #1971346: Rename Property Validation module to Field Validation Property Validation

Also for anyone else that comes across this issue to set a property validater you need to go to http://example.com/admin/structure/property_validation after enabling the property validation module.

Or you can do it programatically by creating a simple custom module and adding this:

/**
 * Implements hook_node_validate().
 */
function MYMODULE_node_validate($node, $form, &$form_state) {
  // trim leading spaces from title field
  if (isset($form_state['values']['title'])) {
    $form_state['values']['title'] = trim($form_state['values']['title']);
  }
}

This will work for all content types used on your site and doesn't require the validation modules (unless using for other purposes).

This module might useful - Node title validation

Per #1, I understand that node titles are fields in Drupal 8. So how do I use this module for node title validation in D8? Per #10, Node Title Validation does something similar for D8 and thus can be used as reference for development if needed.