更新到最新的 RavenDB 后，我收到此错误：
[InvalidCastException：无法将“Index_Auto_2fDocuments_2fByCreationDateTimeAndPublishTimeSortByCreationDateTimePublishTime”类型的对象转换为类型“Raven.Database.Linq.AbstractViewGenerator”。] Raven.Database.Linq.DynamicViewCompiler.GenerateInstance() 在 c:\Builds\RavenDB-Stable\Raven.Database\ Linq\DynamicViewCompiler.cs:598 Raven.Database.Storage.IndexDefinitionStorage.AddAndCompileIndex(IndexDefinition indexDefinition) 在 c:\Builds\RavenDB-Stable\Raven.Database\Storage\IndexDefinitionStorage.cs:233 Raven.Database.DocumentDatabase.PutIndex(String名称，IndexDefinition 定义）在 c:\Builds\RavenDB-Stable\Raven.Database\DocumentDatabase.cs:1207 Raven.Database.Queries.DynamicQueryRunner.CreateAutoIndex(String PermanentIndexName, Func
1 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() 在 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() 在 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 个来源）c:\Dev\Repos\Git\Writer\Kernel\DocumentRavenProvider.cs 中的 +80 Kernel.DocumentRavenProvider.GetDocuments（Int32 计数）：c:\Dev\Repos\ 中的 85 Kernel.DocumentManager.GetDocuments（Int32 计数） 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 参数) +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)
我正在使用嵌入式数据库运行，并且我尝试过
- 删除数据库并重新启动 asp.net 应用程序。同样的错误。
- 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。
更新前，一切正常。我有很多单元测试，我针对内存中的 Raven 数据库进行测试。这里保存和检索工作正常，所以也许它与正在解析的 json 有关？
我有一个调用底层 RavenDB 保存逻辑的控制器：
// 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;
}
我的模型看起来像这样
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，如果我打破上面的控制器方法，那么 json 就可以很好地转换。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 我可以看到这只发生在我尝试查询数据库并获取文档时。这是在一个空数据库和一个带有文档的数据库上测试的。我可以看到保存方法工作得很好。