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我想我错过了一些东西非常简单这里。ObjectSet查询不返回添加EntityObject直到SaveChanges()调用
我有一个EF4 ObjectContext,它包含一个Thing类型的ObjectSet,它映射到我的数据库中名为Things的表中。如果我将东西添加到事物ObjectSet中,那么在我调用ObjectContext上的SaveChanges()之前,东西在东西中不可见。
因此,在下面的测试夹具,AddToThings_AddsItemsToContext_WithSaveChanges通过但AddToThings_AddsItemsToContext_WithoutSaveChanges失败:
[TestFixture]
public class Ef4Tests
{
[SetUp]
public void SetUp()
{
var ef4PocEntities = new Ef4PocEntities();
ef4PocEntities.DeleteDatabase();
ef4PocEntities.CreateDatabase();
}
// this test passes
[Test]
public void AddToThings_AddsItemsToContext_WithSaveChanges()
{
var ef4PocEntities = new Ef4PocEntities();
Assert.AreEqual(0, ef4PocEntities.Things.Count());
ef4PocEntities.AddToThings(new Thing {Name = "Bob"});
ef4PocEntities.SaveChanges();
Assert.AreEqual(1, ef4PocEntities.Things.Count());
}
// this test fails
[Test]
public void AddToThings_AddsItemsToContext_WithoutSaveChanges()
{
var ef4PocEntities = new Ef4PocEntities();
Assert.AreEqual(0, ef4PocEntities.Things.Count());
ef4PocEntities.AddToThings(new Thing {Name = "Bob"});
Assert.AreEqual(1, ef4PocEntities.Things.Count());
}
}
有没有办法做我想要什么?即将实体添加到一个ObjectSet并让它们可见而不保存到数据库?