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Background

I've created a custom top level "page section" block, to work with my existing theme. I've like to restrict top level blocks to ONLY that one block. However, I don't want to disable all blocks completely, because I want all blocks available to use as innerBlocks.

Question

How can I restrict top level blocks, without restricting child level blocks?

1 Answer 1

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The short answer is you can’t. But you can accomplish this by using a block template that only contains your block and is locked. If your block has an InnerBlocks instance, you can add any of the registered blocks to it.

add_action( 'init', 'insert_template' );
function insert_template() {
    $post_type_object = get_post_type_object( 'post' );
    $post_type_object->template =[ [ 'your-custom-block-name'] ];
    $post_type_object->template_lock = 'all';
}
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  • I did a quick search and that may be exactly what I need. I'll investigate it further today.
    – Kelderic
    Nov 30, 2019 at 17:31
  • 1
    I’ll try and get some code samples together and update my answer.
    – Welcher
    Nov 30, 2019 at 17:32
  • I added a bounty to this same question over on StackOverflow. If you'd like to post this answer there, I'll give you the bounty. stackoverflow.com/q/55962177/2111901
    – Kelderic
    Dec 4, 2019 at 3:08
  • And I think what I need is two levels. A custom block called page body, or something, that is called in the template and locked. Then that has an innerBlocks locked to only my page section blocks, but unlimited. Thanks!
    – Kelderic
    Dec 4, 2019 at 3:10
  • Glad to help! I posted to the bounty as well
    – Welcher
    Dec 4, 2019 at 4:07

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