discourse/db/post_migrate
Mark VanLandingham 8feeaa5d69
FEATURE: First iteration of nested replies (#38888)
### Super high level description:
Adds a nested/threaded view for Discourse topics, allowing posts to be
displayed as an indented reply tree instead of the default flat
chronological stream.

  Backend:
- New /n/:slug/:topic_id routes serving roots, children (paginated), and
context (ancestor chain) endpoints
- TreeLoader recursively fetches reply trees with configurable max
depth, Sort supports top/new/old ordering
- NestedViewPostStat caches per-post reply counts (direct + total
descendants, whisper-aware) with a backfill job for existing data
  - NestedTopic model tracks per-topic opt-in and pinned post

  Frontend:
- Recursive <NestedPost> / <NestedPostChildren> components with
lazy-load expansion, cloaking, and scroll tracking
- NestedViewCache service preserves expansion state and scroll position
across back/forward navigation (15 entries, 10min TTL)
- Context view for deep-linking to a specific post with its ancestor
chain
  - Floating actions bar, sort selector, real-time MessageBus updates

Site settings (hidden): nested_replies_enabled, nested_replies_default,
nested_replies_default_sort, nested_replies_max_depth,
nested_replies_cap_nesting_depth, nested_replies_toggle_mode_groups,
plus a per-category default override.

Co-authored-by: Rafael Silva <xfalcox@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Sérgio Saquetim <saquetim@discourse.org>
2026-04-16 08:06:44 -05:00
..
20260112082200_drop_reviewable_action_logs.rb DEV: Remove reviewable_ui_refresh feature flag and legacy code (#36752) 2026-02-23 10:45:36 +08:00
20260311064518_clean_existing_tag_localization_names.rb FIX: Clean localized tag names (#38488) 2026-03-12 12:54:50 +08:00
20260319054730_delete_redundant_everyone_posting_review_groups.rb FEATURE: Support group based category posting review modes (#38707) 2026-04-07 10:41:16 +08:00
20260319054731_drop_permission_from_category_posting_review_groups.rb FEATURE: Support group based category posting review modes (#38707) 2026-04-07 10:41:16 +08:00
20260330161714_drop_pinned_post_number_from_nested_topics.rb FEATURE: First iteration of nested replies (#38888) 2026-04-16 08:06:44 -05:00