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Prevent entering invalid values in the Query Loop block config #33285

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merged 1 commit into from
Jul 12, 2021

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youknowriad
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closes #33270

Right now, you can enter 0 in the Query Loop per page config which will result in an infinite loop breaking the block.
This PR fixes that by adding some validation to the Query Loop Config inputs.

This more a stop gap fix for 5.8. I think a better solution would be to do that validation automatically in the NumberControl component. I tried this quickly but felt a bit impactful for 5.8 given how complex that component looks (not sure if that complexity is needed tbh) so I think I'd rather leave this for our components devs if you all have time, what do you think @ciampo @sarayourfriend.

Testing instructions

  • Insert a query loop block
  • pick a variation
  • click the "Display settings" button in the toolbar and change the settings and try putting 0 I n the "items per page".
  • No error is displayed and the value reverts when you focus out of the input.

@youknowriad youknowriad added [Type] Bug An existing feature does not function as intended Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta [Block] Query Loop Affects the Query Loop Block labels Jul 8, 2021
@youknowriad youknowriad requested a review from ntsekouras July 8, 2021 11:51
@youknowriad youknowriad self-assigned this Jul 8, 2021
@youknowriad youknowriad requested a review from ajitbohra as a code owner July 8, 2021 11:51
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Size Change: -2 B (0%)

Total Size: 1.07 MB

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@ntsekouras ntsekouras left a comment

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Let's go with this one that checks other inputs as well. Although the crashing comes only from perPage due to the logic for initial setup of this attributes, which should be handled better in this issue.

Thanks Riad

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To match the HTML API, the min and max should be inclusive of the validated value, not exclusive as you have it here.

Demo here: https://codesandbox.io/s/empty-platform-h2qvj?file=/src/App.js

Also I created an issue to add a baseline validation based on the min/max props: #33291

@youknowriad
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I think they are inclusive in this PR (unless I'm misunderstanding). The codepen link seems wrong.

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I'm sorry, I misread the code, you already have it as inclusive of the min and max, never mind, LGTM!

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sarayourfriend commented Jul 8, 2021

It seems like the NumberControl is already meant to support this validation:

describe( 'Validation', () => {
it( 'should clamp value within range on ENTER keypress', () => {
render( <NumberControl value={ 5 } min={ 0 } max={ 10 } /> );
const input = getInput();
input.focus();
fireEvent.change( input, { target: { value: -100 } } );
fireKeyDown( { keyCode: ENTER } );
/**
* This is zero because the value has been adjusted to
* respect the min/max range of the input.
*/
expect( input.value ).toBe( '0' );
} );
it( 'should parse to number value on ENTER keypress', () => {
render( <NumberControl value={ 5 } /> );
const input = getInput();
input.focus();
fireEvent.change( input, { target: { value: '10 abc' } } );
fireKeyDown( { keyCode: ENTER } );
expect( input.value ).toBe( '0' );
} );
} );

Ahhhh but it doesn't "clamp" on blur, only on key down 🤔

@youknowriad
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@sarayourfriend interesting! even in keydown (which I didn't experience) it sounds weird/wrong to me, what if the limit is 100 < x < 200 and I type something like 1 in the input, it should allow me to finish my number even if 1 is inferior to 100.

For 5.8, I'm going to land this stop gap solution and we should fix this properly in #33291.

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even in keydown (which I didn't experience) it sounds weird/wrong to me

Oh it's only on the Enter key down, not any key down. So you can finish your number being input for sure, but when you hit enter it will "clamp" the value.

It even seems like it's meant to do the same thing on blur as well:

const handleOnBlur = ( event ) => {
onBlur( event );
setIsFocused( false );
/**
* If isPressEnterToChange is set, this commits the value to
* the onChange callback.
*/
if ( isPressEnterToChange && isDirty ) {
wasDirtyOnBlur.current = true;
if ( ! isValueEmpty( value ) ) {
handleOnCommit( event );
} else {
reset( valueProp );
}
}
};

Notice how it calls handleOnCommit which in turn "commits" the value, causing the NumberControl's reducer to kick in and do the clamping. But it only does this when isPressEnterToChange is true, which is counter intuitive to me. Perhaps that's where the bug is?

In any case, this will take some digging to discover the correct solution to it. It doesn't seem like it should take much new code to fix this problem.

@youknowriad youknowriad merged commit bbaeea2 into trunk Jul 12, 2021
@youknowriad youknowriad deleted the fix/query-toolbar branch July 12, 2021 09:38
@github-actions github-actions bot added this to the Gutenberg 11.1 milestone Jul 12, 2021
@youknowriad youknowriad removed the Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Jul 12, 2021
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[Block] Query Loop Affects the Query Loop Block [Type] Bug An existing feature does not function as intended
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Query Loop block: entering 0 in the items per page setting causes editor to freeze
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