c# – RavenDB：返回属性为null值的对象

我在ASP.NET MVC中使用Raven如下：

[HttpGet]
public ActionResult Index()
{
    ViewBag.Title = Strings.Workflows;
    ViewBag.AddNewText = Strings.Add_new;

    IEnumerable<WorkflowIndexviewmodel> model;
    using (var session = DocumentStore.OpenSession())
    {
        model = session.Query<Workflow>()
            .Select(w => new WorkflowIndexviewmodel { WorkflowId = w.Id,WorkflowName = w.Name })
            .ToArray();
    }

    return View(model);
}

奇怪的是模型对象有一个值(正如我所料,因为我知道我的数据库中有一个Workflow文档),但它上面的WorkflowId和WorkfloName属性都是null.为什么是这样？我的预测有问题吗？

我已经尝试将ToArray()调用移到Select()之前,这很好用：

[HttpGet]
public ActionResult Index()
{
    ViewBag.Title = Strings.Workflows;
    ViewBag.AddNewText = Strings.Add_new;

    IEnumerable<WorkflowIndexviewmodel> model;
    using (var session = DocumentStore.OpenSession())
    {
        model = session.Query<Workflow>()
            .ToArray()
            .Select(w => new WorkflowIndexviewmodel { WorkflowId = w.Id,WorkflowName = w.Name });
    }

    return View(model);
}

解决方法

如果将视图模型中属性的名称更改为与Workflow类相同,则它将起作用.

model = session.Query<Workflow>()
        .Select(w => new WorkflowIndexviewmodel { Id = w.Id,Name = w.Name })
        .ToArray();

但这只是一个似乎是一个错误或限制的解决方法.