Question

我非常困惑，希望有人能说清楚。升级到最新版本的Web API（从Microsoft.AspNet.WebApi.xxx 5.0.0。到Microsoft.AspNet.WebApi.xxx 5.1.2）后，OData的EntitySetController停止处理PATCH谓词并返回406（不可接受）代码。

实施没有改变：

public class ODataAnnouncementController : EntitySetController<TEntity, TKey> where TEntity : class
{
    (...)

    protected override Announcement PatchEntity(Guid key, Delta<Announcement> patch)
    {
        var announcement = getEntityByKeyOrThrowException(key);
        patch.Patch(announcement);
        AnnouncementManager.Instance.Save(announcement, true);
        return announcement;
    }
}

请求也没有改变：

接受：application / json

Content-Type：application / json;字符集= UTF-8

PATCH：http：// {url} / odata / Announcement（guid'62E34FB3-A37E-413F-9843-642D95BA580A'）

{“描述”：“单元测试中的修补描述”}

方法中的断点未被击中，好像“Delta＆lt; Announcement＆gt;＆gt; patch”从未反序列化。它实际上确实触及方法内部断点的唯一条件是当请求BODY为空时导致补丁对象当然为空。

所有其他动词（GET，POST，PUT，DELETE）都可以正常工作。

之前曾经工作过。有人知道有关PATCH的Web API 2.1有任何重大变化吗？我怎么能排除故障呢？

非常感谢

比尔

更新

这是C＃模型：

[Serializable]
[DataContract]
public class Announcement
{                       
    private Guid _announcementID;
    private string _description;
    private bool _isPrivate;
    private DateTime _createdTime;
    private Nullable<Guid> _membershipID;

    [DataMember]
    public Guid AnnouncementID
    {
        get { return this._announcementID; }
        set { this._announcementID = value; }
    }
    [DataMember]
    public string Description
    {
        get { return this._description; }
        set { this._description = value; }
    }       
    [DataMember]
    public bool IsPrivate
    {
        get { return this._isPrivate; }
        set { this._isPrivate = value; }
    }
    [DataMember]
    public DateTime CreatedTime
    {
        get { return this._createdTime; }
        set { this._createdTime = value; }
    }
    [DataMember]
    public Nullable<Guid> MembershipID
    {
        get { return this._membershipID; }
        set { this._membershipID = value; }
    }
}

我使用显式数据模型：

var routingConventions = ODataRoutingConventions.CreateDefault();
config.Routes.MapODataRoute(
            routeName: "ODataRoute",
            routePrefix: "odata",
            model: BuildExplicitODataModel(),
            pathHandler: new DefaultODataPathHandler(),
            routingConventions: routingConventions  
        );

public static IEdmModel BuildExplicitODataModel()
{
ODataModelBuilder modelBuilder = new ODataModelBuilder();
var announcementSet = buildAnnouncementModel(modelBuilder);
return modelBuilder.GetEdmModel();
}

private static EntitySetConfiguration<Announcement> buildAnnouncementModel(ODataModelBuilder modelBuilder)
{
        var announcementSet = modelBuilder.EntitySet<Announcement>("Announcement");
        announcementSet.HasEditLink(
            entityContext => entityContext.Url.ODataLink(
                new EntitySetPathSegment(entityContext.EntitySet.Name),
                new KeyValuePathSegment(ODataUriUtils.ConvertToUriLiteral(entityContext.EntityInstance.AnnouncementID, ODataVersion.V3))),
            followsConventions: true);

        announcementSet.HasIdLink(
            entityContext => entityContext.Url.ODataLink(
                new EntitySetPathSegment(entityContext.EntitySet.Name),
                new KeyValuePathSegment(ODataUriUtils.ConvertToUriLiteral(entityContext.EntityInstance.AnnouncementID, ODataVersion.V3))),
                followsConventions: true);

        var announcement = announcementSet.EntityType;
        announcement.HasKey(p => p.AnnouncementID);
        announcement.Property(p => p.Description);
        announcement.Property(p => p.IsPrivate);
        announcement.Property(p => p.CreatedTime);
        announcement.Property(p => p.MembershipID);
        return announcementSet;
}

这是请求有效负载：

PATCH http：// {url} / odata / Announcement（guid'62E34FB3-A37E-413F-9843-642D95BA580A'）
  接受：application / json
  Content-Type：application / json;字符集= UTF-8

BODY：

{“描述”：“单元测试中的修补描述”}

Answer 1

检查完最新文件EntityRoutingConvention.cs后，我发现actionName只能是Patch或PatchAnnouncement。

永远不会调用PatchEntity。

您可以尝试使用Patch或PatchAnnouncement重命名方法吗？

<强>更新

然而，它在我的repro项目中工作正常。你能比较你的参考版本，WebApiConfig.cs，AnnouncementsController.cs和我的请求。

我注意到一些不同之处：

控制器名称是ODataAnnouncementController，你使用＆＃34; ODataAnnouncement＆＃34;作为模型构建器中的权利名称？
在您的PATCH请求中，为什么要使用＆＃34;公告＆＃34;而不是＆＃34;公告＆＃34;？

<强>参考

Microsoft.AspNet.WebApi 5.1.2 targetFramework =＆＃34; net45＆＃34;

<强> WebApiConfig.cs

using System.Web.Http;
using System.Web.Http.OData.Builder;
using ReproPatchNotWork.Models;

namespace ReproPatchNotWork
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            config.MapHttpAttributeRoutes();

            ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
            builder.EntitySet<Announcement>("Announcements");
            config.Routes.MapODataRoute("odata", "odata", builder.GetEdmModel());
        }
    }
}

<强> AnnouncementsController.cs

using System;
using System.Web.Http.OData;

namespace ReproPatchNotWork.Models
{
    public class AnnouncementsController : EntitySetController<Announcement, Guid>
    {
        protected override Announcement PatchEntity(Guid key, Delta<Announcement> patch)
        {
            Announcement announcement = new Announcement();
            patch.Patch(announcement);
            return announcement;
        }
    }
}

请求

PATCH http：// {url} / odata / Announcements（guid＆＃39; 62E34FB3-A37E-413F-9843-642D95BA580A＆＃39;）

接受：application / json

Content-Type：application / json;字符集= UTF-8

正文：{＆＃34;描述＆＃34;：＆＃34;来自单元测试和＃34的补丁描述;}

来自EntitySetController中的PATCH请求的406（NotAcceptable）响应。 Web API 2.1。的OData

1 个答案: