Update MongoPostRepository.cs

modules/blogging/src/Volo.Blogging.MongoDB/Volo/Blogging/Posts/MongoPostRepository.cs

@@ -35,12 +35,14 @@ namespace Volo.Blogging.Posts
 
         public async Task<List<Post>> GetOrderedList(Guid blogId, bool @descending = false)
         {
+            var query = GetMongoQueryable().Where(x => x.BlogId == blogId);
+            
             if (!descending)
             {
-                return await GetMongoQueryable().Where(x => x.BlogId == blogId).OrderByDescending(x => x.CreationTime).ToListAsync();
+                return await query.OrderBy(x => x.CreationTime).ToListAsync();
             }
-            return await GetMongoQueryable().Where(x => x.BlogId == blogId).OrderBy(x => x.CreationTime).ToListAsync();
             
+            return await query.OrderByDescending(x => x.CreationTime).ToListAsync();
         }
     }
 }