add: populate return orders

src/modules/return/return.repository.ts

@@ -36,9 +36,11 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
         },
       },
       { $unwind: { path: "$returnOrderItems", preserveNullAndEmptyArrays: true } },
+
+      // 3) lookup return reason
       {
         $lookup: {
-          from: "returnreasons", // collection name of ReturnReasonModel
+          from: "returnreasons",
           localField: "returnOrderItems.reason",
           foreignField: "_id",
           as: "returnOrderItems.reason",
@@ -61,9 +63,40 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
         },
       },
       { $unwind: { path: "$orderItem", preserveNullAndEmptyArrays: true } },
-      { $addFields: { "returnOrderItems.orderItem": "$orderItem" } },
 
-      // 5) lookup shop from the orderItem
+      // ✅ 5) populate shipmentItem from orderItem.shipmentItems
+      {
+        $addFields: {
+          "returnOrderItems.shipmentItem": {
+            $first: {
+              $filter: {
+                input: "$orderItem.shipmentItems",
+                as: "si",
+                cond: { $eq: ["$$si._id", "$returnOrderItems.shipmentItem"] },
+              },
+            },
+          },
+        },
+      },
+
+      // 6) attach orderItem itself
+      { $addFields: { "returnOrderItems.orderItem": "$orderItem" } },
+      // ✅ populate product inside shipmentItem
+      {
+        $lookup: {
+          from: "products", // name of your product collection
+          localField: "returnOrderItems.shipmentItem.product",
+          foreignField: "_id", // or "productId" if your product._id isn’t numeric
+          as: "returnOrderItems.shipmentItem.product",
+        },
+      },
+      {
+        $unwind: {
+          path: "$returnOrderItems.shipmentItem.product",
+          preserveNullAndEmptyArrays: true,
+        },
+      },
+      // 7) lookup shop
       {
         $lookup: {
           from: "shops",
@@ -75,7 +108,7 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
       { $unwind: { path: "$shop", preserveNullAndEmptyArrays: true } },
       { $addFields: { shopName: "$shop.shopName" } },
 
-      // 6) group back so each return order is a single document with array of items
+      // 8) regroup all return items per return order
       {
         $group: {
           _id: "$_id",
@@ -89,10 +122,10 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
         },
       },
 
-      // 7) sort (by createdAt) before pagination
+      // 9) sort (latest first)
       { $sort: { createdAt: -1 } },
 
-      // 8) facet for pagination + count
+      // 10) facet for pagination
       {
         $facet: {
           data: [
@@ -114,6 +147,7 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
                   reason: 1,
                   imagesUrl: 1,
                   orderItem: 1,
+                  shipmentItem: 1, // ✅ Include populated shipment item
                 },
               },
             },
@@ -122,7 +156,7 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
         },
       },
 
-      // // 9) flatten count field
+      // 11) flatten count field
       {
         $addFields: {
           totalCount: { $ifNull: [{ $arrayElemAt: ["$totalCount.count", 0] }, 0] },
@@ -131,7 +165,6 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
     ]);
 
     const result = docs[0] || { data: [], totalCount: 0 };
-
     return {
       count: result.totalCount || 0,
       docs: result.data || [],