Adjusted

utils/courses/objectives.util.js

@@ -0,0 +1,62 @@
+"use strict";
+
+/**
+ * For CREATE — plain text array, no IDs needed
+ * objectives: ["text1"] or [{ text: "text1" }]
+ */
+async function syncObjectivesCreate(Model, parentField, parentId, objectives, transaction) {
+  if (!objectives?.length) return;
+
+  await Model.bulkCreate(
+    objectives.map((o, i) => ({
+      [parentField]: parentId,
+      text: typeof o === "string" ? o : o.text,
+      order_index: i,
+    })),
+    { transaction }
+  );
+}
+
+/**
+ * For UPDATE — upsert by objective_id, hard delete removed ones
+ * objectives: [{ objective_id: "123", text: "text1" }, { text: "new" }]
+ */
+async function syncObjectivesUpdate(Model, parentField, parentId, objectives, transaction) {
+  if (!objectives?.length) {
+    await Model.destroy({ where: { [parentField]: parentId }, force: true, transaction });
+    return;
+  }
+
+  const existing    = await Model.findAll({ where: { [parentField]: parentId }, transaction });
+  const existingMap = new Map(existing.map((o) => [String(o.objective_id), o]));
+  const incomingIds = new Set(
+    objectives.filter((o) => o.objective_id).map((o) => String(o.objective_id))
+  );
+
+  // Hard delete removed
+  const toDelete = existing.filter((o) => !incomingIds.has(String(o.objective_id)));
+  if (toDelete.length) {
+    await Model.destroy({
+      where: { objective_id: toDelete.map((o) => o.objective_id) },
+      force: true,
+      transaction,
+    });
+  }
+
+  // Update existing or create new
+  for (let i = 0; i < objectives.length; i++) {
+    const item   = objectives[i];
+    const record = item.objective_id ? existingMap.get(String(item.objective_id)) : null;
+
+    if (record) {
+      await record.update({ text: item.text, order_index: i }, { transaction });
+    } else {
+      await Model.create(
+        { [parentField]: parentId, text: item.text, order_index: i },
+        { transaction }
+      );
+    }
+  }
+}
+
+module.exports = { syncObjectivesCreate, syncObjectivesUpdate };