传递到字典的模型项的类型是“System.Data.Entity.DynamicProxies.Object [英] The model item passed into the dictionary is of type 'System.Data.Entity.DynamicProxies.Object

问题描述

有谁知道为什么我收到此错误：

 模型项目传递到字典类型
system.Data.Entity.DynamicProxies.Object_3E186F803589BF82895B10E08C
2A9AB68EFA619599418D6EB96585D14874CDC0'，
但本词典需要类型的模型项目
System.Collections.Generic.IEnumerable`1 [MyApplication.Domain.Entities.Object]。
 

下面是我的code：

控制器：

 公开的ViewResult指数（）
    {
        如果（User.Identity.IsAuthenticated）
        {
            的MembershipUser的currentUser = Membership.GetUser（）;
            GUID currentUserId =（GUID）currentUser.ProviderUserKey;
            如果（的currentUser = NULL＆放大器;！＆安培; currentUser.ProviderUserKey = NULL＆放大器;！＆安培; currentUser.IsApproved）
            {
                此举的结果=（从db.Moves招
                         其中，move.UserId == currentUserId
                         选择移动）.FirstOrDefault（）;
                返回视图（结果）;
            }
        }
        返回查看（db.Moves.ToList（））;
    }
 

查看：

  @model IEnumerable的＆LT; MovinMyStuff.Domain.Entities.Move＆GT;
@ {
ViewBag.Title =指数;
}@foreach（以型号VAR项）
{
＆LT; D​​IV ID =移动列表项＆GT;
    ＆LT; UL＆GT;
        ＆LT;立GT;
            ＆LT;跨度类=动名＆GT;
                @ Html.DisplayFor（modelItem =＆GT; item.StartCity）
                @ Html.DisplayFor（modelItem =＆GT; item.StartState）
                @ Html.DisplayFor（modelItem =＆GT; item.StartZip） - 
                @ Html.DisplayFor（modelItem =＆GT; item.EndCity）
                @ Html.DisplayFor（modelItem =＆GT; item.EndState）
                @ Html.DisplayFor（modelItem =＆GT; item.EndZip）
            ＆LT; / SPAN＆GT;
        ＆LT; /李＆GT;
        ＆LT;立GT; @ Html.ActionLink（详细信息，详细信息，新{ID = item.MoveId}，{新@class =按钮}）LT; /李＆GT;
    ＆LT; / UL＆GT;
＆LT; / DIV＆GT;
}
 

解决方案

这code：

 移动结果=（从db.Moves招
         其中，move.UserId == currentUserId
         选择移动）.FirstOrDefault（）;
返回视图（结果）;
 

试图返回的单的结果。它的抱怨就是了序的结果。所以，你可以只使用：

  VAR的结果=（从db.Moves招
               其中，move.UserId == currentUserId
               选择移动）。取（1）.ToList（）;
返回查看（结果）;
 

或者

 移动结果=（从db.Moves招
         其中，move.UserId == currentUserId
         选择移动）.FirstOrDefault（）;
返回查看（新[] {结果}）;
 

我个人摆脱查询前pression这里，顺便说一句 - 这是使code比它需要的更加复杂。例如，您可以重写我的第一个选项为：

  VAR的结果= db.Moves.Where（移动=＆GT; move.UserId == currentUserId）
                      。取（1）
                      .ToList（）;
返回查看（结果）;
 

甚至

 返回查看（db.Moves.Where（移动=＆GT; move.UserId == currentUserId）
              。取（1）.ToList（））;
 

Does anyone know why I am getting this error:

The model item passed into the dictionary is of type
system.Data.Entity.DynamicProxies.Object_3E186F803589BF82895B10E08C
2A9AB68EFA619599418D6EB96585D14874CDC0', 
but this dictionary requires a model item of type 
'System.Collections.Generic.IEnumerable`1[MyApplication.Domain.Entities.Object]'.

Here is my code:

Controller:

        public ViewResult Index()
    {
        if (User.Identity.IsAuthenticated)
        {
            MembershipUser currentUser = Membership.GetUser();
            Guid currentUserId = (Guid)currentUser.ProviderUserKey;
            if (currentUser != null && currentUser.ProviderUserKey != null && currentUser.IsApproved)
            {
                Move result = (from move in db.Moves
                         where move.UserId == currentUserId
                         select move).FirstOrDefault();
                return View(result);
            }
        }
        return View(db.Moves.ToList());
    }

View:

@model IEnumerable<MovinMyStuff.Domain.Entities.Move>
@{
ViewBag.Title = "Index";
}

@foreach (var item in Model)
{
<div id="move-list-item">
    <ul>
        <li>
            <span class="move-name">
                @Html.DisplayFor(modelItem => item.StartCity) 
                @Html.DisplayFor(modelItem => item.StartState)
                @Html.DisplayFor(modelItem => item.StartZip) -
                @Html.DisplayFor(modelItem => item.EndCity) 
                @Html.DisplayFor(modelItem => item.EndState)
                @Html.DisplayFor(modelItem => item.EndZip)
            </span>
        </li>
        <li>@Html.ActionLink("Details", "Details", new { id = item.MoveId }, new { @class = "button" })</li>
    </ul>
</div>
}

解决方案

This code:

Move result = (from move in db.Moves
         where move.UserId == currentUserId
         select move).FirstOrDefault();
return View(result);

tries to return a single result. It's complaining that it wants a sequence of results. So you could just use:

var results = (from move in db.Moves
               where move.UserId == currentUserId
               select move).Take(1).ToList();
return View(results);

Or:

Move result = (from move in db.Moves
         where move.UserId == currentUserId
         select move).FirstOrDefault();
return View(new[] { result });

I would personally get rid of the query expression here, by the way - it's make the code more complicated than it needs to be. For example, you could rewrite my first option as:

var results = db.Moves.Where(move => move.UserId == currentUserId)
                      .Take(1)
                      .ToList();
return View(results);

Or even:

return View(db.Moves.Where(move => move.UserId == currentUserId)
              .Take(1).ToList());

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