add: return orders

src/modules/return/return.repository.ts

@@ -14,7 +14,8 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
   }
 
   async getAllReturnsForAdmin(skip: number, limit: number) {
-    const docs = await this.model.aggregate([
+    const [result] = await this.model.aggregate([
+      // --- 1. Lookup order ---
       {
         $lookup: {
           from: "orders",
@@ -23,9 +24,9 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
           as: "order",
         },
       },
-      {
-        $unwind: "$order",
-      },
+      { $unwind: { path: "$order", preserveNullAndEmptyArrays: true } },
+
+      // --- 2. Lookup return order items ---
       {
         $lookup: {
           from: "returnorderitems",
@@ -34,117 +35,79 @@ export class ReturnOrderRepo extends BaseRepository<IReturnOrder> {
           as: "returnOrderItems",
         },
       },
-      {
-        $unwind: "$returnOrderItems",
-      },
+      { $unwind: { path: "$returnOrderItems", preserveNullAndEmptyArrays: true } },
+
+      // --- 3. Lookup order items ---
       {
         $lookup: {
           from: "orderitems",
           localField: "returnOrderItems.orderItem",
           foreignField: "_id",
-          as: "returnOrderItems.orderItem",
-        },
-      },
-      {
-        $unwind: "$returnOrderItems.orderItem",
-      },
-      {
-        $lookup: {
-          from: "products",
-          localField: "returnOrderItems.orderItem.shipmentItems.product",
-          foreignField: "_id",
-          as: "product",
-        },
-      },
-      {
-        $unwind: "$product",
-      },
-      {
-        $addFields: {
-          product: "$product",
+          as: "orderItem",
         },
       },
+      { $unwind: { path: "$orderItem", preserveNullAndEmptyArrays: true } },
+      { $addFields: { "returnOrderItems.orderItem": "$orderItem" } },
+
+      // --- 4. Lookup shop ---
       {
         $lookup: {
           from: "shops",
-          localField: "returnOrderItems.orderItem.shop",
+          localField: "orderItem.shop",
           foreignField: "_id",
           as: "shop",
         },
       },
-      {
-        $unwind: "$shop",
-      },
-      {
-        $addFields: {
-          shopName: "$shop.shopName",
-        },
-      },
-      {
-        $lookup: {
-          from: "sellers",
-          localField: "shop.owner",
-          foreignField: "_id",
-          as: "seller",
-        },
-      },
-      {
-        $unwind: "$seller",
-      },
-      {
-        $addFields: {
-          seller: "$seller.fullName",
-        },
-      },
-      {
-        $project: {
-          _id: 1,
-          order: 1,
-          status: 1,
-          total_price: 1,
-          shopName: 1,
-          seller: 1,
-          product: {
-            _id: 1,
-            title_fa: 1,
-            imagesUrl: 1,
-          },
-          createdAt: 1,
-          updatedAt: 1,
-          returnOrderItems: {
-            _id: 1,
-            quantity: 1,
-            comment: 1,
-            reason: 1,
-            imagesUrl: 1,
-            orderItem: {
-              _id: 1,
-              totalSellingPrice: 1,
-            },
-          },
-        },
-      },
+      { $unwind: { path: "$shop", preserveNullAndEmptyArrays: true } },
+      { $addFields: { shopName: "$shop.shopName" } },
+
+      // --- 5. Sort before pagination ---
+      { $sort: { createdAt: -1 } },
+
+      // --- 6. Facet for pagination + count ---
       {
         $facet: {
-          data: [{ $skip: skip }, { $limit: limit }],
+          data: [
+            { $skip: skip },
+            { $limit: limit },
+            {
+              $project: {
+                _id: 1,
+                order: 1,
+                status: 1,
+                total_price: 1,
+                shopName: 1,
+                createdAt: 1,
+                updatedAt: 1,
+                returnOrderItems: {
+                  _id: 1,
+                  quantity: 1,
+                  comment: 1,
+                  reason: 1,
+                  imagesUrl: 1,
+                  orderItem: {
+                    _id: 1,
+                    totalSellingPrice: 1,
+                  },
+                },
+              },
+            },
+          ],
           totalCount: [{ $count: "count" }],
         },
       },
+
+      // --- 7. Flatten count field ---
       {
         $addFields: {
-          totalCount: { $arrayElemAt: ["$totalCount.count", 0] },
-        },
-      },
-      {
-        $sort: {
-          createdAt: -1,
+          totalCount: { $ifNull: [{ $arrayElemAt: ["$totalCount.count", 0] }, 0] },
         },
       },
     ]);
 
     return {
-      count: (docs?.[0]?.totalCount as number) || 0,
-      docs: docs?.[0]?.data || [],
+      count: result?.totalCount || 0,
+      docs: result?.data || [],
     };
   }