I'd like to create a book in my Drupal site but I chose to do that manually, without using the Book module so I won't be limited by its options.

Thus, I first created a new content-type named "book_pages" and then I gave it a long text field with summary ("body"), and I need a second field-type for paging, but I'm not sure what its field-type should be:

It should automatically include the node order-number** so that if the node is the fifth node of the content-type a user would see the following, when visiting the fifth book_page:

text (body)
5 (page-number)

What field-type should I choose?

closed as primarily opinion-based by leymannx, Alfred Armstrong, mradcliffe, Neograph734, Felix Eve Sep 7 '18 at 7:23

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This question relies heavily on the assumption that you will only ever have one book on your site. Nothing wrong with that, it's just good to emphasize it.

NIDs aren't a good option because they leave a gap in numbering if a node gets deleted.

What you want is the Serial Field. There is only a dev version for D8: https://www.drupal.org/project/serial/releases/8.x-1.x-dev, Porting tracker: https://www.drupal.org/project/contrib_tracker/issues/2767507

This Field doesn't show up on the Create/Edit node form, because it's automatic, but it does display the number on View node.

In case you ever want to add more books to your site but not use Books module here's my answer on how to recreate the functionality: How to create a book without the book module (say, with Views)?

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