Side B fixes a real logic bug (ghost items and mis-marked voted pairs from zero-ratio votes) with a small, precise reordering of a guard clause plus an updated unit test verifying the corrected invariant. Side A is a larger, more diffuse patch mixing a genuine parent-linking bugfix with unrelated signature churn (threading `tree` through multiple call sites) and integration test restructuring, making its net lasting value less clear-cut despite its size.
constitution · epochs · watch · epoch 3
comparison
c_cd965c070df3 (tommy-mor) vs c_abd68b5e771a (tommy-mor)
download prompt · raw event · cmp_b862cc93b2cb7c
council reasoning
A fixes real import/model wiring (apply_entity_under_parent so listing children attach without ensure_path pulling Reddit comment segments) and lasting UI correctness (child titles in the ranking panel), with broader call-site and integration-test coverage. B is a sharp, necessary reducer invariant fix (drop zero-ratio votes before ensure_item/voted_pairs), but it is a narrower edge-case correction than A’s import-path and display design changes.
Side A fixes a functional integration issue in Reddit child imports by introducing `apply_entity_under_parent` to avoid incorrect path expansion, updates the ranking panel to display imported child titles via tree data instead of raw IDs, and adds end-to-end tests covering SSE updates and child fetching. Side B is a good correctness fix that moves the zero-ratio guard before `ensure_item` and `voted_pairs` mutation to prevent ghost items and stale voted pairs, but it is a narrower reducer bugfix with a smaller project-wide impact.
sides
A — c_cd965c070df3 (tommy-mor)
message
[993d359c] Fix Reddit children import wiring and unranked child labels. Listing imports attach posts directly under the subreddit without ensure_path pulling comment-path segments in, and the ranking panel shows imported titles. Update integration tests for JS SSE morphs and children fetch. Co-authored-by: Cursor <cursoragent@cursor.com>
diff preview
diff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs
index d1defd28242fd2ca3b886adc91a7070bef75e653..e649a7d192feade465e19ce6187a829f6ec74372 100644
--- a/server/src/api/ui_html.rs
+++ b/server/src/api/ui_html.rs
@@ -58,7 +58,7 @@ pub async fn post_ui_html(
let tree = state.tree.read().await;
let empty = crate::reducer::NodeState::default();
let node = tree.get(&parent).unwrap_or(&empty);
- let panel = ranking_panel(&parent, node);
+ let panel = ranking_panel(&parent, node, &tree);
JsBuilder::new()
.morph_selector("#ranking-panel", panel)
.into_response()
diff --git a/server/src/fetch/mod.rs b/server/src/fetch/mod.rs
index 0177bb161cea1b72a100b52efdfc5e710271c9eb..35f968c21c69ca557bab7951413e3cfbbccfebfd 100644
--- a/server/src/fetch/mod.rs
+++ b/server/src/fetch/mod.rs
@@ -107,7 +107,7 @@ pub fn fetch_entity_stream(
let mut b = JsBuilder::new()
.morph_selector("#entity-section", html::entity_section(&id, node, false));
if kind == FetchKind::Children {
- b = b.morph_selector("#ranking-panel", ranking_panel(&id, node));
+ b = b.morph_selector("#ranking-panel", ranking_panel(&id, node, &tree));
}
yield Ok(js_event(b.build()));
}
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index 27ce9118c73ec5643e04363ab1a36cf5da6101bf..e88cc43ddc9d8100f7994be6f5960ec4d8f22c55 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -15,7 +15,7 @@ use crate::{
ranking::{
connected_components_from_voted_pairs, ranked_items_subset, RankedItem, MAX_ITERS, TOL,
},
- reducer::NodeState,
+ reducer::{GlobalTree, NodeState},
state::AppState,
ui_action::UI_RPC_FIELD,
};
@@ -182,8 +182,15 @@ fn display_label(id: &ItemId) -> String {
.to_string()
}
+fn child_label(tree: &GlobalTree, id: &ItemId) -> String {
+ tree.get(id)
+ .and_then(|n| n.data.as_ref())
+ .map(|d| d.title.clone())
+ .unwrap_or_else(|| display_label(id))
+}
+
/// Plain (unscored) list of children that have no votes yet.
-fn unranked_list(label: &str, items: &[ItemId]) -> Markup {
+fn unranked_list(label: &str, items: &[ItemId], tree: &GlobalTree) -> Markup {
html! {
@if !items.is_empty() {
h3 class="rank-heading muted small" { (label) }
@@ -191,7 +198,7 @@ fn unranked_list(label: &str, items: &[ItemId]) -> Markup {
@for it in items {
li {
a href=(item_href(it)) {
- strong { (display_label(it)) }
+ strong { (child_label(tree, it)) }
}
}
}
@@ -200,7 +207,7 @@ fn unranked_list(label: &str, items: &[ItemId]) -> Markup {
}
}
-pub fn ranking_panel(item: &ItemId, node: &NodeState) -> Markup {
+pub fn ranking_panel(item: &ItemId, node: &NodeState, tree: &GlobalTree) -> Markup {
let group = &node.local_ranking;
let n = group.idx_to_item.len();
let (comps, _isolates) =
@@ -248,7 +255,7 @@ pub fn ranking_panel(item: &ItemId, node: &NodeState) -> Markup {
@let label = if multi { format!("Ranking group {}", gi + 1) } else { "Ranking".to_string() };
(rank_list(&label, ranked, 1))
}
- (unranked_list("Unranked", &unranked))
+ (unranked_list("Unranked", &unranked, tree))
}
}
}
@@ -297,7 +304,7 @@ async fn item_page(state: AppState, uri: Uri, item: ItemId) -> Markup {
(input_panel("", None))
(breadcrumb_path(&item))
(entity_section(&item, node, false))
- (ranking_panel(&item, node))
+ (ranking_panel(&item, node, &tree))
};
layout("sorter2", body, views)
}
diff --git a/server/src/reddit.rs b/server/src/reddit.rs
index a0eb688709478ee0185b953b41a5d26cc354764d..69d979bc7e4a1cb078f70114dc539bdc1986b574 100644
--- a/server/src/reddit.rs
+++ b/server/src/reddit.rs
@@ -300,9 +300,16 @@ async fn reddit_worker(
}
{
let mut tree = tree.write().await;
- apply_entity_import(&mut tree, &child_id, child_payload);
if kind == FetchKind::Children {
- tree.link_child(&fetch_id, &child_id);
+ let view = entity_view_from_payload(&child_id, &child_payload);
+ tree.apply_entity_under_parent(
+ &fetch_id,
+ &child_id,
+ child_payload,
+ view,
+ );
+ } else {
+ apply_entity_import(&mut tree, &child_id, child_payload);
}
}
written += 1;
diff --git a/server/src/reducer.rs b/server/src/reducer.rs
index a36cd5c9287d61536f9f4a3f6b0df2342388857a..4e42d0369dab50bb2f8ca664aa69b628292f6c07 100644
--- a/server/src/reducer.rs
+++ b/server/src/reducer.rs
@@ -209,14 +209,24 @@ impl GlobalTree {
}
}
- /// Directly attach `child` under `parent`, bypassing path-based nesting.
- /// Used for imported listings (e.g. a subreddit's posts) so they show up
- /// as children of the subreddit rather than a deep `…/comments/<id>` path.
- pub fn link_child(&mut self, parent: &ItemId, child: &ItemId) {
+ /// Import entity data for `id` and attach it as a direct child of `parent`
+ /// without running [`Self::ensure_path`] on `id` (avoids Reddit `/comments/`
+ /// parent rules pulling intermediate path segments into the subreddit).
+ pub fn apply_entity_under_parent(
+ &mut self,
+ parent: &ItemId,
+ id: &ItemId,
+ payload: Value,
+ view: Option<EntityData>,
+ ) {
self.ensure_path(parent);
- self.ensure_path(child);
+ self.ensure_node(id);
+ if let Some(node) = self.nodes.get_mut(id) {
+ node.entity_raw = Some(payload);
+ node.data = view;
+ }
if let Some(p) = self.nodes.get_mut(parent) {
- p.children.insert(child.clone());
+ p.children.insert(id.clone());
}
}
}
diff --git a/test/reddit_import.clj b/test/reddit_import.clj
index 84cbdcf7965e50290313cbce2243a16b583d2097..45a2a19f20799d77e84d8aa64735ab5e7e45f97c 100644
--- a/test/reddit_import.clj
+++ b/test/reddit_import.clj
@@ -67,6 +67,36 @@
(do (Thread/sleep 200) (recur))
false)))))
+(defn- run-reddit-fetch-assertions [app-base data-dir]
+ (let [browse-url (str app-base "/~/https://reddit.com/r/rust")
+ log-path (str data-dir "/events.jsonl")
+ before (:out (process/shell {:out :string :err :string}
+ "curl" "-sf" browse-url))]
+ (is (str/includes? before "Fetch from Reddit"))
+ (is (not (str/includes? before "The Rust Programming Language")))
+ (let [sse (curl-fetch-ui-sse app-base "reddit.com/r/rust" "self")]
+ (is (zero? (:exit sse)) "POST /ui fetch_entity (self) SSE succeeds")
+ (is (str/includes? (:out sse) "Idiomorph.morph"))
+ (is (str/includes? (:out sse) "The Rust Programming Language"))
+ (is (wait-event-log log-path 2000) "event log written"))
+ (let [after (:out (process/shell {:out :string :err :string}
+ "curl" "-sf" browse-url))
+ log (slurp (io/file log-path))]
+ (is (str/includes? after "The Rust Programming Language"))
+ (is (str/includes? log "\"type\":\"entity_imported\""))
+ (is (str/includes? log "\"subscribers\":350000"))
+ (is (str/includes? log "\"display_name\":\"rust\"")))
+ (let [children-sse (curl-fetch-ui-sse app-base "reddit.com/r/rust" "children")]
+ (is (zero? (:exit children-sse)) "POST /ui fetch_entity (children) SSE succeeds")
+ (is (str/includes? (:out children-sse) "Idiomorph.morph"))
+ (is (str/includes? (:out children-sse) "Announcing Rust 1.99")))
+ (let [after-children (:out (process/shell {:out :string :err :string}
+ "curl" "-sf" browse-url))
+ log2 (slurp (io/file log-path))]
+ (is (str/includes? after-children "Announcing Rust 1.99"))
+ (is (str/includes? after-children "Unranked"))
+ (is (str/includes? log2 "announcing_rust_199")))))
+
(deftest reddit-fetch-via-mock-api
(testing "Fetch more queues import; event log stores full payload; page shows title"
(let [root (repo-root)
@@ -102,24 +132,7 @@
bin)]
(try
(is (wait-health app-base 20000) "app healthz")
- (let [browse-url (str app-base "/~/https://reddit.com/r/rust")
- before (:out (process/shell {:out :string :err :string}
- "curl" "-sf" browse-url))]
- (is (str/includes? before "Fetch from Reddit"))
- (is (not (str/includes? before "The Rust Programming Language")))
- (let [log-path (str data-dir "/events.jsonl")
- sse (curl-fetch-ui-sse app-base "reddit.com/r/rust")]
- (is (zero? (:exit sse)) "POST /ui fetch_entity SSE succeeds")
- (is (str/includes? (:out sse) "event: complete"))
- (is (str/includes? (:out sse) "The Rust Programming Language"))
- (is (wait-event-log log-path 2000) "event log written")
- (let [after (:out (process/shell {:out :string :err :string}
- "curl" "-sf" browse-url))
- log (slurp (io/file log-path))]
- (is (str/includes? after "The Rust Programming Language"))
- (is (str/includes? log "\"type\":\"entity_imported\""))
- (is (str/includes? log "\"subscribers\":350000"))
- (is (str/includes? log "\"display_name\":\"rust\"")))))
+ (run-reddit-fetch-assertions app-base data-dir)
(finally
(process/destroy proc))))
(finally
diff --git a/test/smoke.clj b/test/smoke.clj
index 11887c48282088e140d823a88ba616f6325835b3..ce9f958c84b9a89ae55e215ab519f1df6435e24b 100644
--- a/test/smoke.clj
+++ b/test/smoke.clj
@@ -49,7 +49,7 @@
(is (wait-health base 15000) "server responds to /healthz")
(let [home (:out (process/shell {:out :string :err :string}
"curl" "-sf" (str base "/")))]
- (is (str/includes? home "vote-panel"))
+ (is (str/includes? home "entity-section"))
(is (str/includes? home "ranking-panel"))
(is (str/includes? home "parser-panel"))
(is (str/includes? home "__rpc__")))
B — c_abd68b5e771a (tommy-mor)
message
[81de487b] Fix zero-ratio guard in reducer to drop before registering items or pair. Previously the early-return for zero-weight votes happened after ensure_item and voted_pairs.insert, leaving ghost items in the index and the pair incorrectly marked as voted. Move the check to before any side effects. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
diff preview
diff --git a/server/src/reducer.rs b/server/src/reducer.rs
index 6841d35cfc9de2389f340a22b8a45acb335e36c3..0e36979abe0f051493038ff7e652efc7f7a0ac80 100644
--- a/server/src/reducer.rs
+++ b/server/src/reducer.rs
@@ -112,6 +112,10 @@ impl GroupState {
if vote.ratio_right < 0 {
vote.ratio_right = 0;
}
+ if vote.ratio_left == 0 || vote.ratio_right == 0 {
+ // Zero on either side produces no valid edge; drop before registering items or pair.
+ return;
+ }
let a_idx = self.ensure_item(&vote.a);
let b_idx = self.ensure_item(&vote.b);
@@ -121,10 +125,6 @@ impl GroupState {
let w_a = vote.ratio_left as f64;
let w_b = vote.ratio_right as f64;
- if w_a == 0.0 || w_b == 0.0 {
- // Zero on either side produces no valid edge; drop the vote.
- return;
- }
self.add_edge_weight(b_idx, a_idx, w_a);
self.add_edge_weight(a_idx, b_idx, w_b);
diff --git a/server/tests/basic.rs b/server/tests/basic.rs
index cc8c1a0d139f3722ba6ecd13dd001c65be835b67..08159f4a7f0850fd165817a4a1af4f31ced2ad76 100644
--- a/server/tests/basic.rs
+++ b/server/tests/basic.rs
@@ -546,12 +546,10 @@ fn reducer_negative_ratio_clamped_to_zero() {
delegate: Some("00000000-0000-0000-0000-000000000000:test:local/test".to_string()),
thread_tag: "t".to_string(),
});
- // Items are registered, but the zero-clamped vote produces no edges.
- assert_eq!(group.idx_to_item.len(), 2);
- let a_idx = group.item_to_idx[&item_id("https://slug.social/~/t/a")];
- let b_idx = group.item_to_idx[&item_id("https://slug.social/~/t/b")];
- assert!(!group.edges.contains_key(&(a_idx, b_idx)));
- assert!(!group.edges.contains_key(&(b_idx, a_idx)));
+ // Nothing registered: zero-clamped vote is dropped before ensure_item.
+ assert!(group.idx_to_item.is_empty());
+ assert!(group.edges.is_empty());
+ assert!(group.voted_pairs.is_empty());
}
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