fix

controllers/admin/lessons.controller.js

@@ -444,7 +444,9 @@ exports.upsertLessonPage = async (req, res) => {
     }, { returning: true });
 
     try {
-      await recomputeDurations(lessonId);
+      // Pass the blocks we just wrote directly instead of re-reading the page —
+      // avoids depending on read-after-write visibility of the upsert we just did.
+      await recomputeDurations(lessonId, blocks);
     } catch (durErr) {
       console.error("[LESSON LIB][PAGE][DURATION]", durErr);
     }

utils/duration.util.js

@@ -31,6 +31,9 @@ function estimateBlockDuration(block) {
     case "document":
       return readingSecs(block.content?.body);
 
+    case "code":
+      return readingSecs(block.content?.code);
+
     case "image":
       return 60;
 
@@ -95,16 +98,24 @@ async function recomputeCourseDuration(courseId) {
  * Recompute and persist duration_seconds up the chain:
  * blocks → lesson → every attached unit → every course those units are attached to.
  * A lesson may live in many units, and a unit in many courses, so all parents refresh.
+ *
+ * `blocksOverride` lets a caller that just wrote the page (e.g. upsertLessonPage,
+ * which already has the upserted row in hand) skip the re-read — avoids relying on
+ * read-after-write visibility of the just-committed upsert.
  */
-async function recomputeDurations(lessonId) {
+async function recomputeDurations(lessonId, blocksOverride = null) {
   const Lesson = require("../models/courses/lessons.mdl");
   const LessonPage = require("../models/courses/lesson_page.mdl");
   const UnitLesson = require("../models/courses/unit_lessons.mdl");
   const CourseUnit = require("../models/courses/course_units.mdl");
 
   // 1. Lesson duration from blocks
-  const page = await LessonPage.findOne({ where: { lesson_id: lessonId } });
-  const lessonSecs = (page?.blocks ?? []).reduce(
+  let blocks = blocksOverride;
+  if (!blocks) {
+    const page = await LessonPage.findOne({ where: { lesson_id: lessonId } });
+    blocks = page?.blocks ?? [];
+  }
+  const lessonSecs = blocks.reduce(
     (sum, block) => sum + estimateBlockDuration(block), 0
   );