private async Task <bool> IsExisted(University_Majors university_Majors)
 {
     //Kiểm tra sự tồn tại trong DB
     if (await UOW.University_MajorsRepository.Get(university_Majors.Id) == null)
     {
         university_Majors.AddError(nameof(University_MajorsValidator), nameof(university_Majors.MajorsName), ErrorCode.NotExisted);
     }
     return(university_Majors.IsValidated);
 }
        private async Task <bool> CodeValidate(University_Majors university_Majors)
        {
            //Kiểm tra Code nhập vào đã tồn tại trong Db chưa
            University_MajorsFilter filter = new University_MajorsFilter
            {
                MajorsId     = university_Majors.MajorsId,
                UniversityId = university_Majors.UniversityId,
                Year         = new StringFilter {
                    Equal = university_Majors.Year
                }
            };

            var count = await UOW.University_MajorsRepository.Count(filter);

            if (count > 0)
            {
                university_Majors.AddError(nameof(University_MajorsValidator), nameof(university_Majors.MajorsName), ErrorCode.Duplicate);
            }
            return(university_Majors.IsValidated);
        }