Block Editor: Separate server-side mediaUpload key to fix nested provider loop#76137
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adamsilverstein wants to merge 2 commits intotrunkfrom
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Block Editor: Separate server-side mediaUpload key to fix nested provider loop#76137adamsilverstein wants to merge 2 commits intotrunkfrom
adamsilverstein wants to merge 2 commits intotrunkfrom
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Nested ExperimentalBlockEditorProvider instances (e.g. from BlockPreview) overwrite the upload-media store's real server-side mediaUpload with the queue interceptor, causing uploadItem() to loop endlessly. Store the original function under __unstableMediaUploadServer so it survives nesting.
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[Type] Bug
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Size Change: +22 B (0%) Total Size: 6.87 MB
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Summary
Fixes a bug where images uploaded in the site editor get stuck in an infinite loading loop when a Query Loop / Post Template block is present. The root cause: nested
ExperimentalBlockEditorProviderinstances (created byBlockPreview) overwrite the upload-media store's real server-sidemediaUploadfunction with the queue interceptor, causinguploadItem()to loop endlessly.This PR stores the original server-side upload function under a separate key (
__unstableMediaUploadServer) so it survives arbitrary nesting depth.useMediaUploadSettingsprefers this key when passing settings to the upload-media store.Alternative approach to #76124.
Bug flow (before this fix)
settings.mediaUploadwith queue interceptorBlockPreviewreads settings from block-editor store (already has interceptor)useMediaUploadSettingsextracts the interceptor (not the real function)MediaUploadProviderwrites interceptor into upload-media storeuploadItem()callssettings.mediaUpload()→ interceptor →addItems()→ infinite loopHow the fix works
__unstableMediaUploadServerdoesn't exist on incoming settings, somediaUpload(the real function) is stored__unstableMediaUploadServeralready exists from the parent, so the||fallback preserves itifblock is skipped entirely; no behavior changeTest plan
window.__clientSideMediaProcessing = true)🤖 Generated with Claude Code