siyuan-note/siyuan · error

clone attribute view item failed

Error message

clone attribute view item failed

What it means

newBoundAttributeViewItemValue clones the original detached value and rewrites it into a bound value pointing at the new document. It errors when Clone() returns nil or the clone has no Block field, because a block-type value without Block data cannot be converted to a bound (non-detached) reference. Callers wrap this with the item ID (see error 1002).

Solutions

1. Verify the item's primary-key value in the .av JSON has a non-null block object; recreate the row if it is missing
2. Reload/re-index the database so the value is re-read from disk, then retry the conversion
3. In tests, construct the input av.Value with a non-nil Block before calling newBoundAttributeViewItemValue

Example fix

// before
bound := original.Clone()
if nil == bound || nil == bound.Block {
    return nil, errors.New("clone attribute view item failed")
}
// after (caller-side guard)
if original == nil || original.Block == nil {
    return nil, fmt.Errorf("item value has no block data")
}
bound := original.Clone()

if original == nil || original.Block == nil { return errors.New("value has no block data") }

func hasBlockValue(v *av.Value) bool { return v != nil && v.Block != nil }

bound, err := newBoundAttributeViewItemValue(original, docID, icon)
if err != nil { return fmt.Errorf("item %s not bindable: %w", itemID, err) }

When it happens

Trigger: Called from CreateAttributeViewItemDocs for an item whose value.Clone() yields nil, or whose primary-key (block) value lacks the Block struct after cloning — typically due to corrupted attribute-view row data.

Common situations: Hand-edited .av JSON; rows produced by older format versions missing Block; test fixture data (this function is directly exercised by TestNewBoundAttributeViewItemValueUsesDynamicAnchorText) with a value whose Block is nil.

Understand the failure class

Background: "This is a bug, please report it": internal invariant violations, unreachable panics, and SNH errors explained — this error's family across 47 libraries.

Related errors

• clone attribute view item
• bind attribute view item
• clone attribute view value
• invalid create attribute view item documents save mode
• new attribute view item document in an encrypted notebook…

AI-assisted analysis of siyuan-note/siyuan@9f775e8a12 (2026-09-19). Data as JSON: /api/errors/07b8d46acca15409. Report an issue: GitHub.

Appendix: source

Thrown at kernel/model/attribute_view_new_item.go:337

		var cleanupErr error
		for _, item := range items {
			_, _, detachErr := replaceAttributeViewBlock(avID, item.itemID, "", true, nil)
			cleanupErr = errors.Join(cleanupErr, detachErr)
			_, restoreErr := UpdateAttributeViewCell(nil, avID, item.original.KeyID, item.itemID, item.original)
			cleanupErr = errors.Join(cleanupErr, restoreErr)
		}
		cleanupErr = errors.Join(cleanupErr, cleanupCreatedDocs())
		ReloadAttrView(avID)
		return nil, newItemCreationError(err, cleanupErr)
	}
	ret.Transaction = tx
	return ret, nil
}

func newBoundAttributeViewItemValue(original *av.Value, docID, icon string) (*av.Value, error) {
	bound := original.Clone()
	if nil == bound || nil == bound.Block {
		return nil, errors.New("clone attribute view item failed")
	}
	bound.IsDetached = false
	bound.Block.ID = docID
	bound.Block.Content = ""
	bound.Block.Icon = icon
	bound.Block.RefSubtype = av.BlockRefSubtypeDynamic
	return bound, nil
}

func lockAttributeViewItemDocs(avID string) func() {
	lockValue, _ := attributeViewItemDocsLocks.LoadOrStore(avID, &sync.Mutex{})
	lock := lockValue.(*sync.Mutex)
	lock.Lock()
	return lock.Unlock
}

func attributeViewItemDocumentTemplate(attrView *av.AttributeView, saveMode string) (*av.NewItemTemplate, error) {
	switch saveMode {

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