CmsKit - Fix MongoDb Query for Comment details

modules/cms-kit/src/Volo.CmsKit.MongoDB/Volo/CmsKit/MongoDB/Comments/MongoCommentRepository.cs

@@ -23,23 +23,28 @@ namespace Volo.CmsKit.MongoDB.Comments
 
         public async Task<CommentWithAuthorQueryResultItem> GetWithAuthorAsync(Guid id, CancellationToken cancellationToken = default)
         {
-            var query = from comment in (await GetMongoQueryableAsync(cancellationToken))
-                join user in (await GetDbContextAsync(cancellationToken)).CmsUsers on comment.CreatorId equals user.Id
-                where id == comment.Id
-                select new CommentWithAuthorQueryResultItem
-                {
-                    Comment = comment,
-                    Author = user
-                };
+            var dbContext = await GetDbContextAsync();
+            var commentQueryable = await GetMongoQueryableAsync(cancellationToken);
+            var userQueryable = dbContext.Collection<CmsUser>();
+
+            var joined = commentQueryable.Join(userQueryable, x => x.CreatorId, x => x.Id, (comment, user) => new
+            {
+                Comment = comment,
+                User = user
+            });
 
-            var commentWithAuthor = await query.FirstOrDefaultAsync(GetCancellationToken(cancellationToken));
+            var commentWithAuthor = await joined.FirstOrDefaultAsync(GetCancellationToken(cancellationToken));
 
             if (commentWithAuthor == null)
             {
                 throw new EntityNotFoundException(typeof(Comment), id);
             }
 
-            return commentWithAuthor;
+            return new CommentWithAuthorQueryResultItem()
+            {
+                Comment = commentWithAuthor.Comment,
+                Author = commentWithAuthor.User
+            };
         }
 
         public async Task<List<CommentWithAuthorQueryResultItem>> GetListAsync(