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Post Comments block: Merge Comments Query Loop block #40522

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ockham
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@ockham ockham commented Apr 21, 2022

What?

Merge the Comments Query Loop block into the Post Comments block.

Why?

See #40521 for details.

How?

TBD

Testing Instructions

TBD

Screenshots or screencast

TBD

@ockham ockham added [Block] Comments Affects the Comments Block - formerly known as Comments Query Loop [Block] Comments (legacy) The legacy mode of the Comments block (formerly known as Post Comments) labels Apr 21, 2022
@ockham ockham self-assigned this Apr 21, 2022
@ockham ockham force-pushed the merge/comments-query-loop-into-post-comments branch from 52fcc45 to 2027143 Compare April 22, 2022 13:07
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github-actions bot commented Apr 22, 2022

Size Change: +437 B (0%)

Total Size: 1.23 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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@DAreRodz DAreRodz linked an issue Apr 22, 2022 that may be closed by this pull request
@DAreRodz
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DAreRodz commented Apr 22, 2022

Some minor updates:

These two changes would solve all problems with the static-dynamic behavior.

I'll update the list of next steps that @ockham posted in the issue.

@ockham ockham force-pushed the merge/comments-query-loop-into-post-comments branch from 8ace6c6 to 441dfb7 Compare April 25, 2022 13:09
@ockham ockham force-pushed the merge/comments-query-loop-into-post-comments branch from 29675b6 to f2e5bc2 Compare April 25, 2022 13:48
@luisherranz
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luisherranz commented Apr 25, 2022

Added variation to inject the inner block template on block insertion.

https://github.com/WordPress/gutenberg/pull/40522/files#diff-c3f8b5a86aa52698e50024403d5f4e7a50206b840b45770262194ca30c72d686R21-R28

We are using this method because it was impossible to know when innerBlocks.length === 0 was due to a new block, or due to a legacy block. Props to @gziolo for the suggestion!

@ockham
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ockham commented Apr 25, 2022

If I create a (childless) Post Comments block (<-- wp:post-comments /-->) on trunk (i.e. with the block.json’s "inserter": false flag removed), save that, and then try to reload the editor on this PR’s branch, I get a warning message about invalid block content:

image (2)

The console shows

image (3)

I believe that this is because the merged block’s save() would generate the <div /> with className wp-block-post-comments, but that’s not what’s stored in the post body (from when the block was first created on trunk).

I think the problem is that we’re unconditionally rendering the wrapping <Tag />: https://github.com/WordPress/gutenberg/pull/40522/files#diff-3a8f25d555bb48cf812311952459528f8dabbff12f35f07baf926d19e288ca32R8

I've tried to fix this with some logic as follows:

diff --git a/packages/block-library/src/post-comments/save.js b/packages/block-library/src/post-comments/save.js
index 94b8adfadc..d556d66621 100644
--- a/packages/block-library/src/post-comments/save.js
+++ b/packages/block-library/src/post-comments/save.js
@@ -1,12 +1,16 @@
 /**
  * WordPress dependencies
  */
-import { InnerBlocks, useBlockProps } from '@wordpress/block-editor';
+import { useInnerBlocksProps, useBlockProps } from '@wordpress/block-editor';
+import { Children } from '@wordpress/element';
 
 export default function save( { attributes: { tagName: Tag } } ) {
-	return (
-		<Tag { ...useBlockProps.save() }>
-			<InnerBlocks.Content />
-		</Tag>
-	);
+	const blockProps = useBlockProps.save();
+	const innerBlocksProps = useInnerBlocksProps.save( blockProps );
+
+	if ( Children.count( innerBlocksProps.children ) === 0 ) {
+		return;
+	}
+
+	return <Tag { ...innerBlocksProps } />;
 }

Notes:

  • InnerBlocks.Content is basically just a wrapper around useInnerBlocksProps.save(), so those two are more or less equivalent (AFAICT).
  • { Children } from '@wordpress/element' is an alias for React.Children.

My patch isn't quite working yet: It seems that even with the childless Post Comments block, Children.count( innerBlocksProps.children ) is always 1 -- there seems to be a RawHTML component inside 😕

To be continued.

@ockham
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ockham commented Apr 26, 2022

Per discussion on the issue, and due to the problems we've encountered, we've decided to stop working on this for now. We'll revisit after WP 6.0.

@ockham ockham closed this Apr 26, 2022
@gziolo gziolo deleted the merge/comments-query-loop-into-post-comments branch April 26, 2022 09:52
@ockham ockham mentioned this pull request Apr 26, 2022
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@DAreRodz DAreRodz restored the merge/comments-query-loop-into-post-comments branch June 14, 2022 10:02
@DAreRodz DAreRodz deleted the merge/comments-query-loop-into-post-comments branch June 14, 2022 10:06
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Post Comments block: Merge Comments Query Loop block
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