关于c＃：EntityState.Modified而不更新导航属性

EntityState.Modified without updating navigation property

我无法使用EntityState.Modified更新我的一个模型，因为它还尝试更新我的导航属性(我没有更改)。我的控制器动作是：

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[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Rooms([Bind(Include ="ID,BedroomCount,BedroomsDescription,BathroomCount,BathroomsDescription")] Property property)
{
if (ModelState.IsValid)
{
//Modify property
property.DateModified = DateTime.Now;
property.Status = 1;
db.Entry(property).State = EntityState.Modified;
await db.SaveChangesAsync();
return RedirectToAction("Index");
}

return View(property);
}

我的模型看起来像：

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public class Property
{
public int ID { get; set; }

public Int16 BedroomCount { get; set; }

public string BedroomsDescription { get; set; }

public Int16 BathroomCount { get; set; }

public string BathroomsDescription { get; set; }

public int CommunityID { get; set; }

public int PropertyTypeID { get; set; }

public virtual Community Community { get; set; }
public virtual PropertyType PropertyType { get; set; }
}

正如你所看到的，我从我的viewModel绑定了一堆东西(浴室和卧室等)，但我根本没有修改导航属性'Community'，但每当我发布到这个动作方法时，我都会收到以下错误：

The UPDATE statement conflicted with the FOREIGN KEY constraint
"FK_dbo.Property_dbo.Community_CommunityID". The conflict occurred in
database"MyDatabase", table"dbo.Community", column 'ID'. The
statement has been terminated.

如何在不尝试更新外键的情况下更新此模型？我无法在任何地方找到答案

相关讨论

嗨，请你试一下，我希望它会起作用。

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[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Rooms([Bind(Include ="ID,BedroomCount,BedroomsDescription,BathroomCount,BathroomsDescription")] Property property)
{
if (ModelState.IsValid)
{
// try this read this entoity from context and update properties you need to update
var dbproperty = db.Property.FirstOrDefault(x=>x.Id= property.Id); // handle null
//Modify property
dbproperty .DateModified = DateTime.Now;
dbproperty .Status = 1;

// assuming in your context class Properties is the name of table.
db.Entry(dbproperty ).State = EntityState.Modified;
await db.SaveChangesAsync();
return RedirectToAction("Index");
}

return View(property);
}