Every step now uses CREATE [TABLE|INDEX] IF NOT EXISTS or is wrapped
via a _safe(stmt) helper that swallows OperationalError, and
backfill INSERTs become INSERT OR IGNORE. So a partially-applied
m002 (interrupted by a crash before the dbversion bump) re-runs
cleanly on next startup instead of failing on duplicate-table /
duplicate-index / duplicate-PK errors.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replace the fixed two-level (categories + subcategories) menu shape
with an arbitrary-depth tree, capped at 4 levels. The legacy
Atitlan.io project this carries forward already used a self-FK tree;
real menus need the depth (Drinks -> Hot Beverages -> Coffee-based
-> Espressos). As a side benefit, the current CMS has no UI for
subcategories at all, so this refactor incidentally fixes that gap.
Pattern: adjacency list (parent_id self-FK) + denormalized
materialized path (TEXT, '/'-separated) + denormalized depth.
Rejected closure table (overkill at n=5..50) and Postgres ltree
(not portable to SQLite). Subtree queries become
'WHERE path LIKE :p || '%''; subtree moves are a single
SUBSTR + concat UPDATE; max-depth and cycle checks are O(1).
migrations.py
m002_menu_tree:
- CREATE TABLE menu_nodes (id, restaurant_id, parent_id,
name, description, sort_order, image_url, depth, path, time)
with indexes on (restaurant_id), (parent_id), (path).
- Backfill depth-0 from categories; depth-1 from subcategories
with path = parent.id || '/' || own.id.
- ALTER menu_items ADD COLUMN node_id; backfill via
COALESCE(subcategory_id, category_id). Index on node_id.
- DROP subcategory_id, category_id; DROP TABLE subcategories,
categories.
models.py
- New MAX_MENU_DEPTH = 3 (zero-indexed; 4 levels total).
- New MenuNodeRow (DB I/O shape) + MenuNode (extends with
children + items for hydrated tree responses; never persisted).
- New CreateMenuNode.
- MenuItem.node_id is Optional (orphans allowed when a parent
is deleted with cascade=False); CreateMenuItem.node_id is
required (newly created items must land somewhere).
- Category / Subcategory / Create* kept temporarily as
transitional shim shapes for the old endpoints; dropped in
commit 3.
crud.py
- New: create/update/get/get_all/move/delete_menu_node and
get_menu_tree. move_menu_node uses single-statement subtree
rewrite (path = new_prefix || SUBSTR(path, old_len + 1)).
Cycle check: new_parent's path must not contain node_id.
Depth check: max descendant depth + delta_depth <= MAX_MENU_DEPTH.
delete_menu_node default cascade=False (block on children/items);
cascade=True detaches items (sets node_id NULL) rather than
hard-deletes, since items carry nostr_event_ids and are
revenue-bearing.
- get_menu_tree fetches nodes + items in two queries and assembles
the tree in O(n+m) Python — no recursive CTEs, identical on
SQLite + Postgres.
- Old create_category / get_categories / create_subcategory etc.
rewritten as thin shims that translate to/from menu_nodes.
Old endpoints keep working.
- delete_restaurant cascade now deletes from menu_nodes
(single statement) instead of categories + subcategories.
views_api.py
- GET /restaurants/{id}/menu temporarily sources from menu_nodes
via the shims; surfaces items only at depth-0 nodes for now
(commit 2 replaces the whole block with a real tree response).
static/js/menu.js + templates/restaurant/menu.html
- Rename category_id -> node_id in the item dialog payload so
POST /menu_items satisfies the new CreateMenuItem schema.
The CMS still renders against the depth-0 'categories'
projection; full q-tree rewrite lands in commit 4.
Tables: restaurants, categories, subcategories, menu_items,
modifier_groups, modifiers, availability_windows, orders,
order_items, print_jobs, settings.
Design notes:
- One wallet -> N restaurants (no 1:1 assumption).
- Each restaurant carries its own Nostr identity (pubkey + relays).
- Publishable rows have nostr_event_id + nostr_event_created_at
for cheap reconciliation against relay state.
- No umbrella/festival concept stored here; cross-restaurant
grouping is the customer/webapp's concern.
- Modifiers and addons unified under modifier_groups.kind +
selection (one|many).
- Money as msat throughout orders for precision.
- Availability windows per item with optional weekday.
