如何防止UnitOfWork保存ASP.NET Boilerplate

时间:2017-09-07 08:47:51

标签: c# asp.net-core aspnetboilerplate

我有一个get方法,我对要返回的对象的某些数组属性进行了一些过滤:

    public async Task<WorkflowStepDto> GetCurrentWorkflowStep(string entity, string status, string clientId = null)
    {
        var workflowStep = await _workflowStepRepository.GetAll().Include("WorkflowEntity")
                .Include("WorkflowStepActions").Include("WorkflowStepConfigurations")
                .FirstOrDefaultAsync(s => s.Name == status && s.WorkflowEntity.Name == entity);


       var workflowRoles = User.Claims.Where(c => c.Type == "workflowRole").Select(c => c.Value).ToArray();
       workflowStep.WorkflowStepActions =
                workflowStep.WorkflowStepActions
                    .Where(s => (workflowRoles.Contains(s.WorkflowRole) ||
                                 (workflowRoles.Length == 0 && string.IsNullOrEmpty(s.WorkflowRole)) ||
                                 s.WorkflowRole == "*")).OrderBy(a => a.Priority).ToList();
       workflowStep.WorkflowStepConfigurations = workflowStep.WorkflowStepConfigurations
                .Where(c => workflowRoles.Contains(c.WorkflowStepRoleId) ||
                            (workflowRoles.Length == 0 && string.IsNullOrEmpty(c.WorkflowStepRoleId)))
                .OrderBy(c => c.Priority).Take(1).ToList();

        return workflowStep.MapTo<WorkflowStepDto>();
    }

例如,需要过滤掉属性WorkflowStepActions以仅显示用户有权访问的操作,WorkflowStepConfigurations也是如此。

问题是UnitOfWork模式。即使这是GET方法而且我不想保存任何数据,但在方法结束时,UnitOfWork会将更改保存到数据库,删除已过滤的WorkflowStepActions在当前的电话中。

我尝试使用[UnitOfWork(IsDisabled=false)]完全禁用UnitOfWork,但后来我收到一条错误消息,说明因为它已被处理而无法访问存储库。

有没有办法AcceptChanges到UnitOfWork,或者让它自动停止保存更改?

2 个答案:

答案 0 :(得分:1)

使用此方法非常重要(在appservice,domainservice,custom class等中)。

假设您在域服务中使用它

您必须将[UnitOfWork]属性添加到方法并将方法设为虚拟。

        [UnitOfWork] 
        public virtual async Task<WorkflowStepDto> GetCurrentWorkflowStep(string entity, string status, string clientId = null)
        {

        }

如果您想以异步方式手动保存更改。您可以在任何应用程序服务中使用以下代码。

 await CurrentUnitOfWork.SaveChangesAsync();

如果您想开始新的工作单元,可以使用此

//inject IUnitOfWorkManager to your class in constructor method.
private readonly IUnitOfWorkManager _unitOfWorkManager;


public async Task<WorkflowStepDto> GetCurrentWorkflowStep(...)
{
    using (var uow = _unitOfWorkManager.Begin(TransactionScopeOption.RequiresNew))
    {
        //You can save changes in any step of code to get some new inserted record's id... This is not required if you don't have such insertions.
        await _unitOfWorkManager.Current.SaveChangesAsync();

        //You have to apply Complete method in the end.
        await uow.CompleteAsync();
    }
}

要获取更多信息,请阅读文档 - &gt; https://aspnetboilerplate.com/Pages/Documents/Unit-Of-Work

答案 1 :(得分:0)

尝试此解决方法,但在这种情况下,GetCurrentWorkflowStep应该是独立的,即不会被另一个代码隐式调用:

public IUnitOfWorkManager _unitOfWorkManager {get; set;}

[UnitOfWork(IsDisabled = true)]
public async Task<WorkflowStepDto> GetCurrentWorkflowStep(...)
{
    using (var unitOfWork = _unitOfWorkManager.Begin())
    {
        //your code....
    }
}