public async Task <IResultModel> Add(RoleUserAddModel model) { if (!await _roleRepository.ExistsAsync(m => m.Id == model.RoleId)) { return(ResultModel.Failed("角色不存在")); } if (!model.UserIds.Any()) { return(ResultModel.Failed("请选择用户")); } var entities = new List <RoleUserEntity>(); foreach (var userId in model.UserIds) { var isExist = await _roleUserRepository.ExistsAsync(m => m.RoleId == model.RoleId && m.UserId == userId && m.IsDel == false); if (isExist) { continue; } entities.Add(new RoleUserEntity() { RoleId = model.RoleId, UserId = userId }); } if (!entities.Any()) { return(ResultModel.Success()); } var result = await _roleUserRepository.InsertRangeAsync(entities); return(ResultModel.Result(result)); }