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Issue #13618 - only request three fields: id, title and parent to populate the Parent page select list #23637

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merged 2 commits into from
Aug 26, 2020
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Issue #13618 - only request three fields: id, title and parent to populate the Parent page select list #23637

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13af638
Issue #13618 - only request three fields: id, title and parent
bobbingwide Jul 2, 2020
d9f48e9
Fix parent selector for post types without title
youknowriad Aug 26, 2020
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20 changes: 18 additions & 2 deletions packages/core-data/src/resolvers.js
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Original file line number Diff line number Diff line change
Expand Up @@ -153,8 +153,24 @@ export function* getEntityRecords( kind, name, query = {} ) {
...query,
context: 'edit',
} );
const records = yield apiFetch( { path } );
yield receiveEntityRecords( kind, name, Object.values( records ), query );

let records = Object.values( yield apiFetch( { path } ) );
// If we request fields but the result doesn't contain the fields,
// explicitely set these fields as "undefined"
// that way we consider the query "fullfilled".
if ( query._fields ) {
records = records.map( ( record ) => {
query._fields.split( ',' ).forEach( ( field ) => {
if ( ! record.hasOwnProperty( field ) ) {
record[ field ] = undefined;
}
} );

return record;
} );
}

yield receiveEntityRecords( kind, name, records, query );
}

getEntityRecords.shouldInvalidate = ( action, kind, name ) => {
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1 change: 1 addition & 0 deletions packages/editor/src/components/page-attributes/parent.js
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Expand Up @@ -66,6 +66,7 @@ const applyWithSelect = withSelect( ( select ) => {
parent_exclude: postId,
orderby: 'menu_order',
order: 'asc',
_fields: 'id,title,parent',
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This is something we tried but it's not a valid approach because the data module keeps a cache per id and if you do this and another component request the same entity but want access to the remaining properties, it will get a trimmed version causing issues. Basically whenever you use getEntityRecords you shouldn't explicitly pass context or fields. This PR tried to solve it #19498 but it's more complex than it seems.

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Well that's a bit of a bummer. Why not prevent caching for requests where _fields is used? And what should be done about context which is already being passed as edit. Or should the request use a completely different approach - such as an AJAX request that calls wp_dropdown_pages, which is what this code is trying to emulate after all.

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I agree that it's not great. Ideally, something like #19498 is pursued to completion and support multiple entities shapes in core-data.

I also think the unlimited API requests is one of the worst aspects of Gutenberg right now and it has other solutions: pagination and I believe @epiqueras and @adamsilverstein are also looking into this issue.

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Given that the information returned for this _fields request is not going to be useful elsewhere, would it be possible to store it as a different entity type?

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To land something like #19498, we would need to reinvent GraphQL, as can be seen from the caveats that led to the closing of the PR.

Can we use a direct API call in this component until pagination lands?

};

return {
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