Question

在Authorizer类的第72行，我得到一个空引用异常：

if (_authorizationService.TryCheckAccess(permission, _workContextAccessor.GetContext().CurrentUser, content))

问题在于GetContext()返回null，所以很明显，引用CurrentUser会导致我遇到问题。

最初，这是一个迁移创建分类术语，导致对Authorizer的调用。事实上，完整的堆栈跟踪可以在这篇文章下面找到。

我已经尝试了重构迁移的所有内容，但是代码已经在代码中的其他地方被证明了3次（其中一个是在迁移中 - 所以我确信我的'上下文'在其中这样做很好。

迁移代码：

        var taxonomy = _contentManager.New<TaxonomyPart>("Taxonomy");
        taxonomy.Name = "Categories";
        _contentManager.Create(taxonomy, VersionOptions.Published);

        var parentTerm = _taxonomyService.NewTerm(taxonomy);
        parentTerm.Name = "Products";
        parentTerm.Container = taxonomy.ContentItem;
        _contentManager.Create(parentTerm, VersionOptions.Published);
        string[] childTermNames = { "Disks", "Mice", "Keyboards" };

        foreach (var termName in childTermNames)
        {
            var term = _taxonomyService.NewTerm(taxonomy);
            term.Name = termName;
            term.Container = parentTerm.ContentItem;
            _contentManager.Create(term, VersionOptions.Published);
        }

说明：

此代码创建“类别”分类。在这个分类中，有Products个术语，这是所有后续子术语的父术语，因此被指定为容器。

其结果是创建了分类法，但这些术语不是分层的（它们都存在于一个层次上）。

堆栈追踪：

2015-02-13 15:47:32,955 [23] Orchard.ContentManagement.DefaultContentManager - (null) - NullReferenceException thrown from IContentHandler by Orchard.Autoroute.Handlers.AutoroutePartHandler
System.NullReferenceException: Object reference not set to an instance of an object.
   at Orchard.Security.Authorizer.Authorize(Permission permission, IContent content, LocalizedString message) in \Site\src\Orchard\Security\Authorizer.cs:line 72
   at Orchard.Security.Authorizer.Authorize(Permission permission) in \Site\src\Orchard\Security\Authorizer.cs:line 60
   at Orchard.Autoroute.Handlers.AutoroutePartHandler.ProcessAlias(AutoroutePart part)
   at Orchard.Autoroute.Handlers.AutoroutePartHandler.PublishAlias(AutoroutePart part)
   at Orchard.Autoroute.Handlers.AutoroutePartHandler.<.ctor>b__2(PublishContentContext ctx, AutoroutePart part)
   at Orchard.ContentManagement.Handlers.ContentHandler.InlineStorageFilter`1.Published(PublishContentContext context, TPart instance) in Site\src\Orchard\ContentManagement\Handlers\ContentHandler.cs:line 164
   at Orchard.ContentManagement.Handlers.StorageFilterBase`1.Orchard.ContentManagement.Handlers.IContentStorageFilter.Published(PublishContentContext context) in Site\src\Orchard\ContentManagement\Handlers\StorageFilterBase.cs:line 87
   at Orchard.ContentManagement.Handlers.ContentHandler.Orchard.ContentManagement.Handlers.IContentHandler.Published(PublishContentContext context) in Site\src\Orchard\ContentManagement\Handlers\ContentHandler.cs:line 288
   at Orchard.ContentManagement.DefaultContentManager.<>c__DisplayClass5e.<Create>b__5b(IContentHandler handler) in \Site\src\Orchard\ContentManagement\DefaultContentManager.cs:line 534
   at Orchard.InvokeExtensions.Invoke[TEvents](IEnumerable`1 events, Action`1 dispatch, ILogger logger) in Site\src\Orchard\InvokeExtensions.cs:line 17

Answer 1

我和你有同样的问题，我找到了查看TermAdminController的解决方案。

以下是一个示例：

   var parentTerm = _taxonomyService.NewTerm(categoriesTaxonomy);
   parentTerm.Container = categoriesTaxonomy.ContentItem;

   // Create content item before updating so attached fields save correctly
   _orchardServices.ContentManager.Create(parentTerm, VersionOptions.Draft);
   parentTerm.Name = "main category";
   parentTerm.Selectable = true;

   _taxonomyService.ProcessPath(parentTerm);
   _orchardServices.ContentManager.Publish(parentTerm.ContentItem);

   var subTerm = _taxonomyService.NewTerm(categoriesTaxonomy);

   //here you set the parent term
   subTerm.Container = parentTerm == null ? categoriesTaxonomy.ContentItem : parentTerm.ContentItem;

   // Create content item before updating so attached fields save correctly
   _orchardServices.ContentManager.Create(subTerm, VersionOptions.Draft);
   subTerm.Name = "sub category";
   subTerm.Selectable = true;

   _taxonomyService.ProcessPath(subTerm);
   _orchardServices.ContentManager.Publish(subTerm.ContentItem);

希望它有所帮助！

授权者类中的Orchard Context Null

1 个答案: