refactor(db): share update path so set_visibility avoids a redundant fetch; tie public-visibility const to the enum; test internal exclusion

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

crates/db/src/catalog.rs

@@ -14,7 +14,7 @@ use crate::{audit, authority, fields, vocab};
 const ENTITY_TYPE: &str = "object";
 
 /// The visibility value eligible for the public surface.
-const PUBLIC_VISIBILITY: &str = "public";
+const PUBLIC_VISIBILITY: &str = Visibility::Public.as_str();
 
 const OBJECT_COLUMNS: &str = "id, object_number, object_name, number_of_objects, \
      brief_description, current_location, current_owner, recorder, recording_date, \
@@ -117,6 +117,9 @@ where
 }
 
 /// List **public** objects ordered by object number, with `limit`/`offset` paging.
+///
+/// `limit` and `offset` must be non-negative (Postgres rejects a negative `LIMIT`);
+/// the public API layer clamps them before calling.
 pub async fn list_public_objects<'e, E>(
     executor: E,
     limit: i64,
@@ -249,10 +252,25 @@ pub async fn update_object(
         return Ok(false);
     };
 
-    let changes = update_changes(&old.to_input(), input);
+    apply_object_update(&mut *conn, actor, id, &old.to_input(), input).await?;
+
+    Ok(true)
+}
+
+/// Diff `old`→`new`, write the changed columns + an `updated` audit entry, both on
+/// `conn`. A no-op (no field changed) touches neither the row's `updated_at` nor the
+/// audit log.
+async fn apply_object_update(
+    conn: &mut sqlx::PgConnection,
+    actor: AuditActor,
+    id: ObjectId,
+    old: &ObjectInput,
+    new: &ObjectInput,
+) -> Result<(), sqlx::Error> {
+    let changes = update_changes(old, new);
+
     if changes.is_empty() {
-        // No-op: don't touch updated_at or the audit log.
-        return Ok(true);
+        return Ok(());
     }
 
     sqlx::query(
@@ -263,15 +281,15 @@ pub async fn update_object(
          WHERE id = $1",
     )
     .bind(id.to_uuid())
-    .bind(&input.object_number)
-    .bind(&input.object_name)
-    .bind(input.number_of_objects)
-    .bind(input.brief_description.as_deref())
-    .bind(input.current_location.as_deref())
-    .bind(input.current_owner.as_deref())
-    .bind(input.recorder.as_deref())
-    .bind(input.recording_date)
-    .bind(input.visibility.as_str())
+    .bind(&new.object_number)
+    .bind(&new.object_name)
+    .bind(new.number_of_objects)
+    .bind(new.brief_description.as_deref())
+    .bind(new.current_location.as_deref())
+    .bind(new.current_owner.as_deref())
+    .bind(new.recorder.as_deref())
+    .bind(new.recording_date)
+    .bind(new.visibility.as_str())
     .execute(&mut *conn)
     .await?;
 
@@ -287,7 +305,7 @@ pub async fn update_object(
     )
     .await?;
 
-    Ok(true)
+    Ok(())
 }
 
 /// Why changing an object's visibility failed.
@@ -302,9 +320,9 @@ pub enum VisibilityError {
 }
 
 /// Move an object to `target` visibility, enforcing the stepwise state machine, and
-/// audit the change. Reuses [`update_object`]'s diff/audit path, so only `visibility`
-/// appears in the audit entry — and setting to the current value is an idempotent no-op
-/// (no row touch, no audit). Pass a transaction connection.
+/// audit the change. Uses the same diff/audit path as `update_object`, so only
+/// `visibility` appears in the audit entry — and setting to the current value is an
+/// idempotent no-op (no row touch, no audit). Pass a transaction connection.
 pub async fn set_visibility(
     conn: &mut sqlx::PgConnection,
     actor: AuditActor,
@@ -317,10 +335,11 @@ pub async fn set_visibility(
 
     let new_visibility = object.visibility.transition_to(target)?;
 
-    let mut input = object.to_input();
+    let old_input = object.to_input();
+    let mut new_input = old_input.clone();
 
-    input.visibility = new_visibility;
-    update_object(&mut *conn, actor, id, &input).await?;
+    new_input.visibility = new_visibility;
+    apply_object_update(&mut *conn, actor, id, &old_input, &new_input).await?;
 
     Ok(())
 }

crates/db/tests/visibility.rs

@@ -140,6 +140,13 @@ async fn public_reads_return_only_public_records(pool: PgPool) {
     )
     .await
     .unwrap();
+    let internal = catalog::create_object(
+        &mut tx,
+        AuditActor::System,
+        &object("I-1", Visibility::Internal),
+    )
+    .await
+    .unwrap();
     tx.commit().await.unwrap();
 
     assert!(
@@ -168,4 +175,12 @@ async fn public_reads_return_only_public_records(pool: PgPool) {
             .unwrap()
             .is_empty()
     );
+
+    // internal records are excluded from public reads too (not just draft)
+    assert!(
+        catalog::public_object_by_id(db.pool(), internal)
+            .await
+            .unwrap()
+            .is_none()
+    );
 }

crates/domain/src/object.rs

@@ -17,7 +17,7 @@ pub enum Visibility {
 }
 
 impl Visibility {
-    pub fn as_str(&self) -> &'static str {
+    pub const fn as_str(&self) -> &'static str {
         match self {
             Visibility::Draft => "draft",
             Visibility::Internal => "internal",