c# - 更新到 2.5.5.2700 后 RavenDB DateTime 错误

Question

更新到最新的 RavenDB 后我得到这个错误:

[InvalidCastException: Unable to cast object of type 'Index_Auto_2fDocuments_2fByCreationDateTimeAndPublishTimeSortByCreationDateTimePublishTime' to type 'Raven.Database.Linq.AbstractViewGenerator'.] Raven.Database.Linq.DynamicViewCompiler.GenerateInstance() in c:\Builds\RavenDB-Stable\Raven.Database\Linq\DynamicViewCompiler.cs:598 Raven.Database.Storage.IndexDefinitionStorage.AddAndCompileIndex(IndexDefinition indexDefinition) in c:\Builds\RavenDB-Stable\Raven.Database\Storage\IndexDefinitionStorage.cs:233 Raven.Database.DocumentDatabase.PutIndex(String name, IndexDefinition definition) in c:\Builds\RavenDB-Stable\Raven.Database\DocumentDatabase.cs:1207 Raven.Database.Queries.DynamicQueryRunner.CreateAutoIndex(String permanentIndexName, Func1 createDefinition) in c:\Builds\RavenDB-Stable\Raven.Database\Queries\DynamicQueryRunner.cs:170
Raven.Database.Queries.DynamicQueryRunner.GetAppropriateIndexToQuery(String entityName, IndexQuery query, DynamicQueryMapping map) in c:\Builds\RavenDB-Stable\Raven.Database\Queries\DynamicQueryRunner.cs:158
Raven.Database.Queries.DynamicQueryRunner.ExecuteDynamicQuery(String entityName, IndexQuery query) in c:\Builds\RavenDB-Stable\Raven.Database\Queries\DynamicQueryRunner.cs:32
Raven.Client.Embedded.EmbeddedDatabaseCommands.Query(String index, IndexQuery query, String[] includes, Boolean metadataOnly, Boolean indexEntriesOnly) in c:\Builds\RavenDB-Stable\Raven.Client.Embedded\EmbeddedDatabaseCommands.cs:481
Raven.Client.Document.AbstractDocumentQuery2.ExecuteActualQuery() in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Document\AbstractDocumentQuery.cs:664 Raven.Client.Document.AbstractDocumentQuery2.get_QueryResult() in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Document\AbstractDocumentQuery.cs:633
Raven.Client.Linq.RavenQueryProviderProcessor1.ExecuteQuery() in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Linq\RavenQueryProviderProcessor.cs:1499 Raven.Client.Linq.RavenQueryInspector1.GetEnumerator() in c:\Builds\RavenDB-Stable\Raven.Client.Lightweight\Linq\RavenQueryInspector.cs:105
System.Collections.Generic.List1..ctor(IEnumerable1 collection) +446
System.Linq.Enumerable.ToList(IEnumerable1 source) +80 Kernel.DocumentRavenProvider.GetDocuments(Int32 count) in c:\Dev\Repos\Git\Writer\Kernel\DocumentRavenProvider.cs:85 Kernel.DocumentManager.GetDocuments(Int32 count) in c:\Dev\Repos\Git\Writer\Kernel\DocumentManager.cs:46 Blog.Controllers.DocumentController.Index() in c:\Dev\Repos\Git\Writer\Blog\Controllers\DocumentController.cs:18 lambda_method(Closure , ControllerBase , Object[] ) +79 System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) +261
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) +39 System.Web.Mvc.Async.<>c_DisplayClass42.b_41() +34 System.Web.Mvc.Async.<>c_DisplayClass39.b_33() +124 System.Web.Mvc.Async.<>c_DisplayClass4f.b_49() +838923 System.Web.Mvc.Async.<>c_DisplayClass37.b_36(IAsyncResult asyncResult) +15 System.Web.Mvc.Async.<>c_DisplayClass2a.b_20() +33 System.Web.Mvc.Async.<>c_DisplayClass25.b_22(IAsyncResult asyncResult) +839508 System.Web.Mvc.<>c_DisplayClass1d.b_18(IAsyncResult asyncResult) +28 System.Web.Mvc.Async.<>c_DisplayClass4.b_3(IAsyncResult ar) +15 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +65 System.Web.Mvc.Async.<>c_DisplayClass4.b_3(IAsyncResult ar) +15 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +51 System.Web.Mvc.<>c_DisplayClass8.b_3(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.<>c_DisplayClass4.b_3(IAsyncResult ar) +15 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +51 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

执行此查询时

documents = session.Query<Model.Document>().Where(d => d.PublishTime <= DateTime.Now)
.OrderByDescending(document=>document.CreationDateTime).Take(count)

我正在运行一个嵌入式数据库，我已经尝试过

1. 删除数据库并重新启动 asp.net 应用程序。 同样的错误。
2. 向数据库添加一些内容，然后重新启动并加载 asp.net 应用程序。 同样的错误。

更新之前，一切正常。我有很多单元测试，我在这些单元测试中针对内存中的 Raven 数据库进行测试。这里保存和检索工作正常，所以可能与正在解析的 json 有关？

我有这个调用底层 RavenDB 保存逻辑的 Controller :

// POST api/document
        public async System.Threading.Tasks.Task<Model.Document> Post([FromBody]Model.Document document)
        {
            var savedDocument = await _documentManager.Save(document);

            var hubConnection = new Microsoft.AspNet.SignalR.Client.Hubs.HubConnection(BaseSiteUrl);
            var hub = hubConnection.CreateHubProxy("DocumentHub");
            hubConnection.Start().Wait();
            hub.Invoke("NewArticle", savedDocument.Id).Wait();

            return document;
        }

我的模型是这样的

    public class Document
    {
        public int Id { get; set; }
        public string Headline { get; set; }
        public string Text { get; set; }
        public DateTime CreationDateTime { get; set; }
        public DateTime PublishTime { get; set; }
        public HashSet<string> Tags { get; private set; }
        public int CategoryId { get; set; }

        [Raven.Imports.Newtonsoft.Json.JsonIgnore]
        public Model.Category Category { get; private set; }

        public Document()
        {
            CreationDateTime = DateTime.Now;
            Tags = new HashSet<string>();
        }

        public Document(string headline, string text, DateTime creationTime, DateTime publishTime)
        {
            Headline = headline;
            Text = text;
            CreationDateTime = creationTime;
            PublishTime = publishTime;
            Tags = new HashSet<string>();
        }

        public string GetCategoryName()
        {
            string name = String.Empty;

            if (this.Category != null)
            {
                name = this.Category.Name;
            }

            return name;
        }

        public void SetCategory(Model.Category category)
        {
            if (category != null)
            {
                this.Category = category;
                this.CategoryId = category.Id;
            }
        }

        public string GetTeaser()
        {
            string teaser = Text;
            if (Text.Count() > 250)
                teaser = Text.Substring(0, 250) + " ...";

            return teaser;
        }

        public string GetCommaSeperatedTagsString()
        {
            var tags = new StringBuilder();

            int i = 0;
            foreach (string tag in Tags)
            {
                if (!String.IsNullOrEmpty(tag))
                {
                    tags.Append(tag);

                    if (i < Tags.Count - 1)
                    {
                        tags.Append(",");
                    }
                }
                i++;

            }

            return tags.ToString();
        }

        public string GetSpaceSeperatedTagsString()
        {
            var tags = new StringBuilder();

            int i = 0;
            foreach (string tag in Tags)
            {
                if (!String.IsNullOrEmpty(tag))
                {
                    tags.Append(tag);

                    if (i < Tags.Count - 1)
                    {
                        tags.Append(" ");
                    }
                }
                i++;

            }

            return tags.ToString();
        }

        public void AddTagsString(string tagsString)
        {
            string[] tagsSplitted = tagsString.Split(',');

            foreach (var tag in tagsSplitted)
            {
                if (!String.IsNullOrEmpty(tag))
                {
                    Tags.Add(tag);
                }
            }
        }

        public string GetTimeString()
        {
            System.TimeSpan span = DateTime.Now.Subtract(this.CreationDateTime);
            string time = "lige udgivet";

            if (span.Days > 0)
            {
                if (span.Days > 1)
                    time = span.Days + " dage siden";
                else
                    time = "en dag siden";
            }

            else if (span.Hours > 0)
            {
                if (span.Hours > 1)
                    time = span.Hours + " timer siden";
                else
                    time = "en time siden";
            }

            else if (span.Minutes > 0)
            {
                if (span.Minutes > 1)
                    time = span.Minutes + " minutter siden.";
                else
                    time = "et minut siden.";
            }

            else if (span.Seconds > 0)
            {
                time = "lige udgivet";
            }
            else if (span.Milliseconds > 0)
            {
                time = "lige udgivet";
            }

            return time;
        }
    }

public class Category
            {
                public string Name { get; set; }
                public int Id { get; set; }
            }

但是，如果我中断上面的 Controller 方法，则 json 转换得很好。这里没有错误。

RavenDB 是否改变了 DateTime 的处理方式？有谁知道解决方案，或者一篇文章可以为我指明正确的方向。

更新我可以看到只有当我尝试查询数据库并获取文档时才会发生这种情况。这是在空数据库和包含文档的数据库上测试的。我可以看到保存方法工作得很好。

Answer 1

这是通过从 nuget 中卸载 Raven.Embedded 并重新安装来解决的。