fix: invalid link reference in after the original block is removed

src/main/frontend/extensions/tldraw.cljs

@@ -90,13 +90,15 @@
                                                 (:db/id (model/get-page uuid))
                                                 (keyword type)))
    :redirectToPage (fn [page-name-or-uuid]
-                     (let [page-name (if (util/uuid-string? page-name-or-uuid)
-                                       (:block/name (model/get-block-parent (parse-uuid page-name-or-uuid)))
-                                       page-name-or-uuid)
+                     (let [page-name (or (when (util/uuid-string? page-name-or-uuid)
+                                           (:block/name (model/get-block-parent (parse-uuid page-name-or-uuid))))
+                                         page-name-or-uuid)
+                           page-exists? (model/page-exists? page-name)
                            whiteboard? (model/whiteboard-page? page-name)]
-                       (if whiteboard? (route-handler/redirect-to-whiteboard!
-                                        page-name {:block-id page-name-or-uuid})
-                           (route-handler/redirect-to-page! page-name-or-uuid))))})
+                       (when page-exists?
+                         (if whiteboard? (route-handler/redirect-to-whiteboard!
+                                          page-name {:block-id page-name-or-uuid})
+                             (route-handler/redirect-to-page! page-name-or-uuid)))))})
 
 (rum/defc tldraw-app
   [page-name block-id]

tldraw/apps/tldraw-logseq/src/components/BlockLink/BlockLink.tsx

@@ -13,7 +13,12 @@ export const BlockLink = ({ id }: { id: string }) => {
   let linkType = validUUID(id) ? 'B' : 'P'
 
   if (validUUID(id)) {
-    if (queryBlockByUUID(id)?.properties?.['ls-type'] === 'whiteboard-shape') {
+    const block = queryBlockByUUID(id)
+    if (!block) {
+      return <span className='p-2'>Invalid reference. Did you remove it?</span>
+    }
+
+    if (block.properties?.['ls-type'] === 'whiteboard-shape') {
       iconName = 'link-to-whiteboard'
     } else {
       iconName = 'link-to-block'