public async Task <bool> ValidateId(Variation Variation)
        {
            VariationFilter VariationFilter = new VariationFilter
            {
                Skip = 0,
                Take = 10,
                Id   = new LongFilter {
                    Equal = Variation.Id
                },
                Selects = VariationSelect.Id
            };

            int count = await UOW.VariationRepository.Count(VariationFilter);

            if (count == 0)
            {
                Variation.AddError(nameof(VariationValidator), nameof(Variation.Id), ErrorCode.IdNotExisted);
            }

            return(count == 1);
        }