public void Create(CreateFileRelationsInput input)
        {
            foreach (var item in input.Files)
            {
                var entity = new AbpFileRelation()
                {
                    Id           = Guid.NewGuid(),
                    BusinessId   = input.BusinessId,
                    BusinessType = input.BusinessType,
                    FileId       = item.Id,
                    Sort         = item.Sort
                };

                _abpFileRelationRepository.Insert(entity);
            }
        }
        public async Task CreateAsync(CreateFileRelationsInput input)
        {
            if (input.Files == null)
            {
                return;
            }
            foreach (var item in input.Files)
            {
                var entity = new AbpFileRelation()
                {
                    Id           = Guid.NewGuid(),
                    BusinessId   = input.BusinessId,
                    BusinessType = input.BusinessType,
                    FileId       = item.Id,
                    Sort         = item.Sort
                };

                await _abpFileRelationRepository.InsertAsync(entity);
            }
        }
        public async Task UpdateAsync(CreateFileRelationsInput input)
        {
            var exit_files = _abpFileRelationRepository.GetAll().Where(r => r.BusinessId == input.BusinessId && r.BusinessType == input.BusinessType);

            foreach (var item in exit_files)
            {
                await _abpFileRelationRepository.DeleteAsync(item);
            }

            foreach (var item in input.Files)
            {
                var entity = new AbpFileRelation()
                {
                    Id           = Guid.NewGuid(),
                    BusinessId   = input.BusinessId,
                    BusinessType = input.BusinessType,
                    FileId       = item.Id,
                    Sort         = item.Sort
                };
                await _abpFileRelationRepository.InsertAsync(entity);
            }
        }