实体模型没有更新的SaveChanges上 [英] Entity Model Not Being Updated on SaveChanges

问题描述

我与实体框架某处一种误解。这code是我的单元测试：

I have a misunderstanding somewhere with the Entity Framework. This code is from my unit testing:

Public Sub UpdateRosterLinkTest()
    Dim target As PlayerAdmin = New PlayerAdmin()

    target.PlayerAdminManager = playerAdminTestManager
    target.Team = playerAdminTestManager.GetAirForceMensBB()

    playerAdminTestManager.resetRosterLink(target)
    Assert.IsNull(target.Team.RosterLink)

    Dim playerAdmin As PlayerAdmin = New PlayerAdmin()
    playerAdmin.TeamId = 12434
    playerAdmin.RosterLink = "Roster Link"

    playerAdmin.UpdateRosterLink()

    Dim team As DAL.Team = playerAdminTestManager.GetAirForceMensBB()
    Assert.AreEqual("Roster Link", team.RosterLink)

End Sub

我创建一个 PlayerAdmin ，这是一个模型类。 target.Team 是一个实体对象。我要做的就是重置 RosterLink 字段中的团队只是为了确保我们的测试在同一地点开始了。然后调用 UpdateRosterLink（）功能。这看起来像：

I'm creating a PlayerAdmin, which is a model class. target.Team is an Entity object. What I do is reset the RosterLink field in the Team just to make sure our test starts out at the same place. Then I call the UpdateRosterLink() function. That looks like:

Function UpdateRosterLink() As Integer
        If (PlayerAdminManager Is Nothing) Then
            PlayerAdminManager = New PlayerAdminManager()
        End If

        Team = PlayerAdminManager.GetTeamByTeamId(TeamId)
        Team.RosterLink = RosterLink
        Dim numberOfChanges As Integer = PlayerAdminManager.SaveChanges()
        Return numberOfChanges
    End Function

当我运行这个code，我可以看到保存到SQL Server从（ RosterLink =名册链接，这拉就像我在单位设置的变化测试）。

When I run this code, I can see the changes saved to the SQL Server this pulls from (RosterLink = Roster Link, like I set in the unit test).

不过，我的单元测试失败，因为 team.RosterLink 还是没有。功能 GetAirForceMensBB（）返回团队与TeamId = 12434：

However, my unit test is failing, because team.RosterLink is still Nothing. The function GetAirForceMensBB() returns the Team with TeamId = 12434:

Function GetAirForceMensBB() As DAL.Team
    Return (From team In Container.Teams Where team.TeamId = 12434).SingleOrDefault
End Function

我敢肯定，我使用的是实体框架的错误，它可能有事可做的事实，我打电话了 PlayerAdminTestManager 在不同的地方，但我不明白为什么。虽然，我将 PlayerAdminManager 是 PlayerAdminTestManager 。 PlayerAdminTestManager 扩展 PlayerAdminManager ，仅供参考。

I'm sure I'm using the entity framework incorrectly and it probably has something to do with the fact that I am calling the PlayerAdminTestManager in different places, but I don't understand why. Although, I set the PlayerAdminManager to be the PlayerAdminTestManager. PlayerAdminTestManager extends PlayerAdminManager, fyi.

为什么 team.RosterLink 没有显示从 UpdateRosterLink ？

感谢

修改
集装箱是我的的ObjectContext 。这是我访问存储在数据库中的信息。 Container.Teams 重新presents我的小组表。

EDIT Container is my ObjectContext. This is how I access the information stored in the database. Container.Teams represents my Teams table.

推荐答案

但问题是我引用集装箱的不同实例（每个管理者创造了自己的）。因而，实体物品不附着于任何东西。

The problem was I was referencing different instantiations of the Container (each manager created its own). Thus, the entity items were not attached to anything.

卫生署！

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