siyuan-note/siyuan · error

parse attribute view context filter: %w

Error message

parse attribute view context filter: %w

What it means

Wraps an error from av.ParseAttributeViewContextFilter when the attribute view block's stored context-filter IAL value fails to parse into a valid AttributeViewContextFilter. The underlying error is preserved with %w; the wrapper adds the phase where parsing failed.

Source

Thrown at kernel/model/attribute_view.go:5465

func GetAttributeViewContextFilter(attrView *av.AttributeView,
	blockID string) (ret *av.AttributeViewContextFilter, err error) {
	if nil == attrView || "" == blockID {
		return
	}
	node, _, err := getNodeByBlockID(nil, blockID)
	if nil != err {
		return nil, err
	}
	// 普通内容块的数据库属性面板也会以内容块 ID 渲染属性视图，此时不存在块级上下文筛选。
	if nil == node || ast.NodeAttributeView != node.Type {
		return nil, nil
	}
	if node.AttributeViewID != attrView.ID {
		return nil, fmt.Errorf("block [%s] is not an instance of attribute view [%s]", blockID, attrView.ID)
	}
	ret, err = av.ParseAttributeViewContextFilter(node.IALAttr(av.NodeAttrContextFilter))
	if nil != err {
		return nil, fmt.Errorf("parse attribute view context filter: %w", err)
	}
	return
}

func getAttributeViewInstanceNode(attrView *av.AttributeView,
	blockID string) (node *ast.Node, tree *parse.Tree, err error) {
	if nil == attrView || "" == blockID {
		return nil, nil, av.ErrAttributeViewNotFound
	}
	node, tree, err = getNodeByBlockID(nil, blockID)
	if nil != err {
		return
	}
	if nil == node || nil == tree || ast.NodeAttributeView != node.Type || node.AttributeViewID != attrView.ID {
		return nil, nil, fmt.Errorf("block [%s] is not an instance of attribute view [%s]", blockID, attrView.ID)
	}
	return
}

View on GitHub (pinned to 8641553a1f)

Solutions

  1. Clear the block's context-filter IAL attribute and reconfigure the filter in the UI
  2. Inspect the IAL value and fix it to match the current AttributeViewContextFilter JSON schema
  3. Update to the latest SiYuan version so the current filter schema is used for parsing
Defensive patterns

Strategy: try-catch

Validate before calling

const raw = node?.ial?.["custom-context-filter"];
if (raw) JSON.parse(raw); // throws early if malformed

Try / catch

try { const f = await getAvContextFilter(blockID, avID); } catch (e) { if (String(e).includes("context filter")) await clearAndReconfigureFilter(blockID); else throw e; }

Prevention

When it happens

Trigger: Reading the context filter of a database block whose custom IAL attribute (the context-filter key) contains malformed, truncated, or schema-invalid JSON — e.g. written by an older version or corrupted during sync/undo replay.

Common situations: Undo/redo replay restored an IAL written before a filter-schema change; manual IAL editing produced invalid JSON; a sync conflict merged partial filter data.

Understand the failure class

Background: "failed to unmarshal" / json.Unmarshal errors: why parsing a response into a Go struct fails and how to fix it — this error's family across 23 libraries.

Related errors

AI-assisted analysis of siyuan-note/siyuan@8641553a1f (2026-09-11). Data as JSON: /api/errors/5924ba19dd761926. Report an issue: GitHub.