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Allow using groups and columns inside the experimental form block #55758

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merged 3 commits into from
Nov 2, 2023

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aristath
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@aristath aristath commented Nov 1, 2023

What?

Allows adding columns and groups inside a form block.
This will allow us to build some more complex forms, with different layouts etc.

Why?

Because right now, forms only allow input fields one below the other, which limits our ability to build beautiful things.

How?

  • Switched from using parent to using ancestor in block.json files for input blocks
  • Added the core/columns and core/group blocks in the allowed blocks for forms

Testing Instructions

  • Enable the forms blocks experiment
  • Add a form in a post, and inside it add a group or a columns block
  • Try nesting a text-input, checkbox etc inside the group or columns block
  • Save it, and confirm it works properly on the front

Testing Instructions for Keyboard

Not applicable

@aristath aristath added [Type] Enhancement A suggestion for improvement. [Block] Form (experimental) Affects the form block labels Nov 1, 2023
@aristath aristath changed the title Allow using groups and columns inside forms Allow using groups and columns inside the experimental form block Nov 1, 2023
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@fabiankaegy fabiankaegy left a comment

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This is a really useful addition 🚀

Left one comment inline but looks good to me :)

packages/block-library/src/form/index.php Outdated Show resolved Hide resolved
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github-actions bot commented Nov 1, 2023

Size Change: +210 B (0%)

Total Size: 1.7 MB

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compressed-size-action

@t-hamano
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t-hamano commented Nov 1, 2023

Let me stop auto-merge. Wouldn't this PR allow us to put the Form block inside of the Form block? I have not tested this PR, so sorry if I am mistaken.

Form > Group > Form

My understanding is that nesting of form elements should not be allowed.

@aristath
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aristath commented Nov 1, 2023

@t-hamano you're absolutely right... Thank you for catching that! 👍
Can you think of a way to prevent that? I don't think we have something like notAncestor 🤔

@t-hamano
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t-hamano commented Nov 1, 2023

Since there may be cases where multiple forms are inserted on a page, simply setting reusable:false may not be ideal. I think we need some logic to disallow nesting of the form block, but I can't think of a concrete approach at the moment 😅 I'll do some research too.

@aristath
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aristath commented Nov 1, 2023

@t-hamano maybe we should have a notAncestor prop in block.json? 🤔
If yes, then we can copy-paste-and-tweak the logic from

let hasBlockAllowedAncestor = true;
const blockAllowedAncestorBlocks = blockType.ancestor;
if ( blockAllowedAncestorBlocks ) {
const ancestors = [
rootClientId,
...getBlockParents( state, rootClientId ),
];
hasBlockAllowedAncestor = some( ancestors, ( ancestorClientId ) =>
checkAllowList(
blockAllowedAncestorBlocks,
getBlockName( state, ancestorClientId )
)
);
}
and add an extra condition in the canInsert const below that snippet 🤔


EDIT: Or maybe we could define in ancestor something like !core/form (notice the ! prefix, which would mark it as a negative)

@fabiankaegy
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@gziolo and I have long been talking about more strict rules for the block API in the block API tracking issue: #41236

So from my perspective that issue is not new and has little to do with the update here. I don't think it should prevent moving this forward but would of course love a solution for it :)

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github-actions bot commented Nov 1, 2023

Flaky tests detected in b977750.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/6719428592
📝 Reported issues:

@t-hamano
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t-hamano commented Nov 1, 2023

What about using the __unstableCanInsertBlockType hook? I think we can restrict the blocks that can be inserted only when inside a specific parent block.

This code is an example.

@aristath
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aristath commented Nov 1, 2023

The simplest change I can think of, is to allow values like !core/form in ancestor (with a ! prefix to mark it as an exclusion)... That would be relatively simple to implement by tweaking the code in packages/block-editor/src/store/selectors.js, without introducing a new API

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aristath commented Nov 1, 2023

What about using the __unstableCanInsertBlockType hook? I think we can restrict the blocks that can be inserted only when inside a specific parent block.

This code is an example.

Huh... Good call! Thank you @t-hamano!

Pushed a commit implementing that filter.
Tested it, and now you can't add a form inside a form 👍

@t-hamano t-hamano self-requested a review November 1, 2023 12:29
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In my testing, nesting forms appear to work correctly in all cases 👍

  • Root > ✅ Form
  • Root > Group > ✅ Form
  • Root > Columns > Column > ✅ Form
  • Root > Form > Group > ❌ Form
  • Root > Form > Columns > Column > ❌ Form

As for filters, I think it's better to run them inside the init() function.

export const init = () => {
	// Prevent adding forms inside forms.

	// ...

	return initBlock( { name, metadata, settings } );
};

@aristath
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aristath commented Nov 2, 2023

As for filters, I think it's better to run them inside the init() function.

Makes sense... Done.
Tested and everything still works as expected 👍

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gziolo commented Nov 2, 2023

What about using the __unstableCanInsertBlockType hook? I think we can restrict the blocks that can be inserted only when inside a specific parent block.

I see the same filter allows removing Post Content and Template Part blocks from the post editor. It also prevents adding a Template Part block inside the Query Loop and inside the Post Content block which plays a similar role. I guess it's fine to reuse it here as well.

@gziolo and I have long been talking about more strict rules for the block API in the block API tracking issue: #41236

So from my perspective that issue is not new and has little to do with the update here. I don't think it should prevent moving this forward but would of course love a solution for it :)

I agree it shouldn't be a blocker, but it looks like there is a working solution in place.

The remaining question is how to offer a general solution for the same problem. There are many way how it can be approached, and the filter used would be one of them if we consider it an edge case. We could also offer a way to list disallowed parents/ancestors separately, or in this particular case offer something like supports.insertIntoSelf: false. The challenge though is that it still is going to be possible to drag and drop one form into another form, because all the available tools help only in the scope of the inserter.

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The remaining question is how to offer a general solution for the same problem. There are many way how it can be approached, and the filter used would be one of them if we consider it an edge case. We could also offer a way to list disallowed parents/ancestors separately, or in this particular case offer something like supports.insertIntoSelf: false. The challenge though is that it still is going to be possible to drag and drop one form into another form, because all the available tools help only in the scope of the inserter.

Yeah also you can pretty much always circumvent it via a synced pattern

@aristath aristath merged commit 5d6c304 into trunk Nov 2, 2023
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@aristath aristath deleted the add/groups-in-forms branch November 2, 2023 09:05
@github-actions github-actions bot added this to the Gutenberg 17.0 milestone Nov 2, 2023
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aristath commented Nov 2, 2023

Since the concerns for this PR were addressed, I went ahead and merged it.
I agree there needs to be a more generalized solution to disallow nesting some blocks in themselves (or in other types of blocks), but until a more generalized solution is implemented, using the filter is an acceptable solution 👍

const DISALLOWED_PARENTS = [ 'core/form' ];
addFilter(
'blockEditor.__unstableCanInsertBlockType',
'removeTemplatePartsFromPostTemplates',
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What do template parts and post templates have to do with this? :)

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Good catch, this namespace would need to be changed to something like removeFormFromInserter 😅

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Yes, something like core/block-library/preventInsertingFormIntoAnotherForm would fit better. I don't think we have ever established a good pattern for naming filters.

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5 participants