fixed header template to be marginally functional.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index 9973232bf..48214cf25 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -1162,7 +1162,8 @@ export namespace Doc {
         return doc[StrCast(doc.layout_fieldKey, 'layout')];
     }
     export function LayoutFieldKey(doc: Doc, templateLayoutString?: string): string {
-        return StrCast(templateLayoutString || Doc.Layout(doc).layout).split("'")[1]; // bcz: TODO check on this .  used to always reference 'layout', now it uses the layout speicfied by the current layout_fieldKey
+        const match = StrCast(templateLayoutString || Doc.Layout(doc).layout).match(/fieldKey={'([^']+)'}/);
+        return match?.[1] || ''; // bcz: TODO check on this .  used to always reference 'layout', now it uses the layout speicfied by the current layout_fieldKey
     }
     export function NativeAspect(doc: Doc, dataDoc?: Doc, useDim?: boolean) {
         return Doc.NativeWidth(doc, dataDoc, useDim) / (Doc.NativeHeight(doc, dataDoc, useDim) || 1);