Guard internallinks against blocks without a page

n2y/plugins/internallinks.py

@@ -63,7 +63,13 @@ class NotionInternalLink(TextRichText):
 
     def __init__(self, client, notion_data, block=None):
         super().__init__(client, notion_data, block)
-        if block is None or not is_internal_link(self.href, self.block.page.notion_id):
+        # Rich text can appear in contexts without a page (e.g. property
+        # values); only same-page links inside a page's blocks are resolvable.
+        if (
+            block is None
+            or block.page is None
+            or not is_internal_link(self.href, self.block.page.notion_id)
+        ):
             raise UseNextClass
 
     def to_pandoc(self):

tests/test_plugin_internallinks.py

@@ -1,5 +1,9 @@
 from unittest.mock import Mock, patch
 
+import pytest
+
+from n2y.errors import UseNextClass
+
 from n2y.blocks import ChildPageBlock, DividerBlock, HeadingOneBlock, ParagraphBlock
 from n2y.notion import Client
 from n2y.notion_mocks import (
@@ -12,6 +16,7 @@
 )
 from n2y.page import Page
 from n2y.plugins.internallinks import (
+    NotionInternalLink,
     find_target_block,
     get_notion_id_from_href,
     is_internal_link,
@@ -151,6 +156,17 @@ def mock_page_with_link_to_divider(wrap_notion_user, link_text: str = "see below
     return page, href
 
 
+@patch("n2y.notion.Client.wrap_notion_user")
+def test_internal_link_in_block_without_page_uses_next_class(wrap_notion_user):
+    # Rich text can appear in contexts whose block has no page (e.g. property
+    # values); the plugin must defer instead of crashing on block.page.
+    client = Client("", plugins=["n2y.plugins.internallinks"])
+    wrap_notion_user.return_value = User(client, mock_user())
+    rich_text = mock_rich_text(text="x", href="/1234#5678")
+    with pytest.raises(UseNextClass):
+        NotionInternalLink(client, rich_text, block=Mock(page=None))
+
+
 def test_internal_link_to_textless_block_left_unresolved():
     # Links can target blocks with no rich_text (images, dividers); the plugin
     # must not crash and should leave the link unchanged.