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Preserve bindings metadata in block transforms #59179

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merged 16 commits into from Feb 22, 2024

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@SantosGuillamot SantosGuillamot commented Feb 19, 2024

What?

Fixes #59086

This pull request adds the possibility of preserving and adapting the metadata attribute for the following transforms:

  • Paragraph to heading.
  • Heading to paragraph.
  • Paragraph to button.

I've also added some tests to check that, in those transformations, the content, align, and metadata attributes are preserved. I couldn't find any existing tests for that. Please let me know if that's not the case.

A couple of questions that come to my mind:

  • Should we preserve any data stored in metadata or only the bindings?
  • Should we explore the possibility of using a hook to make it work for all transforms instead of hardcoding it for these ones?

Why?

Right now, if you rename your block, or add a binding to it, and transform it into another block, that data is not preserved.

How?

I just added some logic in the heading, and the button transforms objects to pass the metadata attribute as well.

Testing Instructions

Test renaming a block is preserved

  • Go to a page and add a paragraph.
  • Click on the block options and rename it.
  • Transform paragraph into a heading.
  • Check that the custom name.

Repeat the process transforming a heading into a paragraph and a paragraph into a button.

Test bindings in a block are preserved

  • Go to a page and add a paragraph.
  • Go to the Code editor and add a binding to it.
{"metadata":{"bindings":{"content":{"source":"core/post-meta","args":{"key":"my_custom_field"}}}}}
  • Go to the Visual editor and transform the paragraph into a heading.
  • Check that the bindings object is preserved.

Repeat the process transforming a heading into a paragraph.

Repeat the process transforming a paragraph into a button. In this case, the object should change to point to the "text" attribute instead of "content".

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github-actions bot commented Feb 19, 2024

Size Change: -52 B (0%)

Total Size: 1.7 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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github-actions bot commented Feb 19, 2024

Flaky tests detected in 5e3eda0.
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🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/7987644150
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@SantosGuillamot SantosGuillamot marked this pull request as ready for review February 19, 2024 16:19
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@SantosGuillamot SantosGuillamot added [Type] Bug An existing feature does not function as intended [Feature] Block Conversion Block transforms from one block to another [Feature] Custom Fields Anything related to the custom fields project - connecting block attributes and dynamic values labels Feb 19, 2024
@talldan
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talldan commented Feb 20, 2024

Thanks for putting the PR together!

Should we preserve any data stored in metadata or only the bindings?

IMO, the name could be preserved, as it feels like a bug that it's removed after a transform.

The id could also be preserved, as I think that would ensure the pattern overrides continue to work after transforming a block in a pattern source.

Should we explore the possibility of using a hook to make it work for all transforms instead of hardcoding it for these ones?

The name definitely feels like a candidate for something that could apply universally on any transform. It also seems like a core block editor feature, so could be part of the code in the blocks package.

I have wondered if there's an automatic way to transform the binding attributes, for example passing in an object like { content: 'content' } as the original block attributes to the transform function, and seeing what key the value 'content' get mapped to. But it gets a bit sketchy if the transform function does any manipulation to the attribute value.

Some blocks also add a new wrapper (e.g. paragraph to group/columns), so there are some interesting permutations. It might be difficult to handle this completely automatically.

The maintenance of handling every block individually is also quite a lot to consider though 😄

@gziolo
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gziolo commented Feb 20, 2024

First of all, major props to @SantosGuillamot for proposing the initial implementation so spark the discussion.

The maintenance of handling every block individually is also quite a lot to consider though 😄

The same issue exists for block attributes. Since block bindings depend on them, I don't think we can automate in any way without doing the same for the attributes themselves.

IMO, the name could be preserved, as it feels like a bug that it's removed after a transform.

The id could also be preserved, as I think that would ensure the pattern overrides continue to work after transforming a block in a pattern source.

I think the biggest challenge is that metadata is also an attribute and while we can automatically preserve some of them, the question is where is the line. For example, what happens when you transform the Paragraph block into the Verse block where today we don't support block bindings?

In effect, I would be in favor of making the transformation explicit for now and make it coded in the cases where it makes sense today. In the future, if we repeat something in all places, we can abstract it away.

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gziolo commented Feb 20, 2024

This is looking great for the initial rollout after the iterations applied from my perspective. I left one #59179 (comment) regarding replicating the approach fro the Button block on other modified blocks.

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artemiomorales commented Feb 21, 2024

I gave this a test and it's all working as expected for me, and nothing jumps out at me regarding the util logic 👍

I've tried rerunning the failing mobile tests and they failed again — I'm not sure why getTransformedMetadata is not being found.

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gziolo commented Feb 21, 2024

I've tried rerunning the failing mobile tests and they failed again — I'm not sure why getTransformedMetadata is not being found.

Good catch! It looks like the code for Gutenberg Mobile has some overridden files that don't return the new helper method. My recommendation would be to move the util to packages/block-library/src/utils/ folder. This way the file is going to be available to the React Native code without any additional work. Additionally, there isn't much value at the moment in locating it inside @wordpress/block-editor since it's private and only used by core blocks.

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SantosGuillamot commented Feb 21, 2024

My recommendation would be to move the util to packages/block-library/src/utils/ folder.

This makes sense to me. I believe mobile tests are failing because I didn't expose the function in the private-apis.native.js file.

EDIT: I changed it in this commit.

@gziolo gziolo added the Backport to WP Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Feb 21, 2024
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Nice one 👍🏻

Let's make sure CI is back to normal and all tests pass.

@SantosGuillamot
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SantosGuillamot commented Feb 21, 2024

In this commit, I changed the util trying to understand which properties should be preserved based on the block supports. The goal was to make it easier to use. This way, you just have to pass the name of the original and the resulting blocks.

I believe this should help to abstract it further in the future. Let me know what you think.

I'll add some tests to the code block as well.

EDIT: Code block transform tests added.

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I believe I implemented all the changes I had in mind. I will work on supporting block renaming in other block transform in a follow-up PR.

@ntsekouras
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Thanks for the PR! This is an interesting challenge here and this seems like a first iteration that actually kind of centralizes the handling, even not being a generic solution. I'm definitely going to check it more when I'm back(currently in a team meetup).

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Thanks for jumping in 🙂

I'm definitely going to check it more when I'm back(currently in a team meetup).

Would you like us to wait until you review it or should we merge it and work on improvements in follow-up PRs?

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Would you like us to wait until you review it

I have checked the code and tested already, and others have reviewed. Of course you can land :) Great job here @SantosGuillamot !

@gziolo gziolo merged commit 4e8a019 into trunk Feb 22, 2024
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@gziolo gziolo deleted the fix/preserve-metadata-in-block-transforms branch February 22, 2024 09:51
@github-actions github-actions bot added this to the Gutenberg 17.9 milestone Feb 22, 2024
getdave pushed a commit that referenced this pull request Feb 27, 2024
* Add metadata in heading transforms

* Add metadata in button transforms

* Add heading and button transform from/to paragraph

* Revert "Add heading and button transform from/to paragraph"

This reverts commit c3138e3.

* Move tests to individual block specs

* Explicitly transform metadata in button block

* Explicitly transform metadata in heading block

* Make bindings transform explicit in heading block

* Use util to transform metadata

* Use metadata util in code block to keep id and name

* Move util to block-library package

* Change code transforms util path

* Inherit transform metadata props in the util

* Add transform tests for code block

* Return early if no supported properties

* Use bindings callback for mapping attributes
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getdave commented Feb 27, 2024

I just cherry-picked this PR to the cherry-pick-wp-6-5-beta-3 branch to get it included in the next release: 6a8bf9d

@getdave getdave added Backported to WP Core Pull request that has been successfully merged into WP Core and removed Backport to WP Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta labels Feb 27, 2024
getdave pushed a commit that referenced this pull request Feb 27, 2024
* Add metadata in heading transforms

* Add metadata in button transforms

* Add heading and button transform from/to paragraph

* Revert "Add heading and button transform from/to paragraph"

This reverts commit c3138e3.

* Move tests to individual block specs

* Explicitly transform metadata in button block

* Explicitly transform metadata in heading block

* Make bindings transform explicit in heading block

* Use util to transform metadata

* Use metadata util in code block to keep id and name

* Move util to block-library package

* Change code transforms util path

* Inherit transform metadata props in the util

* Add transform tests for code block

* Return early if no supported properties

* Use bindings callback for mapping attributes
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Backported to WP Core Pull request that has been successfully merged into WP Core [Feature] Block Conversion Block transforms from one block to another [Feature] Custom Fields Anything related to the custom fields project - connecting block attributes and dynamic values [Type] Bug An existing feature does not function as intended
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Metadata attribute is not preserved after transforming paragraph block into heading
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