小编Bro*_*and的帖子

我有亲子关系(一对多).我能够创建子项,但删除失败.我创建了一个孩子,保存它,但是当我删除时,我得到:

A foreign key value cannot be inserted because a corresponding primary key value 
does not exist. [ Foreign key constraint name = FK_dbo.Children_dbo.Parents_ParentId ]

我注意到当删除被发送到服务器时,孩子的parentid为0,实体状态为"modified".我希望这会被"删除".

相关视图模型部分:

function queryFailed(error) {
  console.log('Query failed: ' + error.message);
}
function save() {
  dataservice.saveChanges().fail(queryFailed);
}
function deleteChild(child) {
  parent().children.remove(child);
}
function addChild() {
  dataservice.createChild(parent);
}

HTML:

<section data-bind="with: parent">
  <div data-bind="foreach: children">
    <div>
      <select name="propertyOne" 
        data-bind="options: propertyOneOptions, value: propertyOne, optionsText: 'description', optionsCaption: 'Select a Property'">
      </select>
      <button data-bind="click: $root.deleteChild">Delete Child</button>
    </div>
  </div>
  <button data-bind="click: …

首先我读了很多关于这个主题的文章,并安装了几个"路由调试"插件.我对Java/Spring比较熟悉,所以我真的不知道如何调试这个东西,使用vs 2012.(我无论如何都不能让IISExpress打印任何调试,而不是我习惯使用Spring/Tomcat的那种调试输出.)

public class RouteConfig
{
  public static void RegisterRoutes(RouteCollection routes)
  {
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");  

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Legal", 
          action = "Index", 
          id = UrlParameter.Optional }
    );
  }
}

现在,我可以通过默认控制器点击索引页面.但是,我试图基于以下控制器点击URL/WebApi/Metadata /:

[BreezeController]
public class WebApiController : ApiController {
  private readonly EFContextProvider<BankruptcyDbContext> _contextProvider =
    new EFContextProvider<BankruptcyDbContext>();

  [HttpGet]
  public string Metadata() {
    return _contextProvider.Metadata();
  }
}

"Route Debugger"表示我对/ WebApi/Metadata,/ WebApi/Metadata /,/ WebApi/Metadata/0等的请求应该"匹配",但我得到的只是404.

Edit1:我终于找到了跟踪日志并获得了更多细节:

The controller for path '/WebApi/Metadata' was not found or does not implement IController