Return nil for cursor_for_record when record is nil

Gemfile.lock

@@ -64,6 +64,7 @@ GEM
     ruby-progressbar (1.13.0)
     sqlite3 (1.7.2)
       mini_portile2 (~> 2.8.0)
+    sqlite3 (1.7.2-arm64-darwin)
     sqlite3 (1.7.2-x86_64-darwin)
     sqlite3 (1.7.2-x86_64-linux)
     timeout (0.4.1)
@@ -72,6 +73,7 @@ GEM
     unicode-display_width (2.5.0)
 
 PLATFORMS
+  arm64-darwin-23
   ruby
   x86_64-darwin-21
   x86_64-linux

lib/activerecord_cursor_paginate/page.rb

@@ -78,6 +78,8 @@ def cursors
 
     private
       def cursor_for_record(record)
+        return nil unless record
+
         cursor = Cursor.from_record(record, columns: @order_columns)
         cursor.encode
       end

test/paginator_test.rb

@@ -275,4 +275,17 @@ def test_returns_page_object
     assert page2.has_next?
     assert page2.has_previous?
   end
+
+  def test_empty_page
+    p = User.where("created_at > ?", Time.current).cursor_paginate()
+    page1 = p.fetch
+
+    assert_equal([], page1.records)
+    assert_equal(0, page1.count)
+    assert_not page1.next_cursor
+    assert_not page1.previous_cursor
+    assert_not page1.has_previous?
+    assert_not page1.has_next?
+    assert_empty page1.cursors
+  end
 end