Tridion:在事件系统中设置页面的元数据模式时出错

Question

这是在Tridion 2011 SP1上.

我正在使用Tridion事件系统中的组件保存事件来创建相应的页面并将一些元数据与该页面相关联.在指定模式时,我收到的事件日志表明无法找到模式的UUID.

错误中的UUID是我想要使用的元数据模式,我也使用本地TcmUri作为元数据模式.我此刻有点茫然.

.NET和结果错误如下:

码

public static TcmUri CreatePage(TcmUri parentSgId, Component component, TcmUri componentTemplateUri, TcmUri metaDataSchemaUri = null)
    {
        Logging.Debug("Attempting to create page in " + parentSgId.ToString());
        Page page = new Page(component.Session, parentSgId);
        page.Title = component.Title;
        page.FileName = component.Title;
        // Add a metadata schema
        if (metaDataSchemaUri != null)
        {
            TcmUri localMetaDataSchemaUri = TransformTcmUri(metaDataSchemaUri, parentSgId);
            page.MetadataSchema = (Schema)page.Session.GetObject(localMetaDataSchemaUri);
        }
        // Add the CP
        TcmUri localComponentUri = Helpers.TransformTcmUri(component.Id, parentSgId);
        TcmUri localComponentTemplateUri = Helpers.TransformTcmUri(componentTemplateUri, parentSgId);
        page.ComponentPresentations.Add(new ComponentPresentation(new Component(localComponentUri, component.Session), new ComponentTemplate(localComponentTemplateUri, component.Session)));
        try
        {
            page.Save(true);
            Logging.Debug("Created page successfully " + page.Id.ToString());
            return page.Id;
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }

    }

错误

Unable to find uuid:C42EE4FC-D2A2-49F5-92C7-BF6DCB014343:Metadata.
Component: Tridion.ContentManager Errorcode: 0 User: EMAKINA\MTSUser
StackTrace Information Details: at
Bair.Tridion.Events.Utilities.Helpers.CreatePage(TcmUri parentSgId,
Component component, TcmUri componentTemplateUri, TcmUri
metaDataSchemaUri) [...]

Answer 1

Quirijin指出的问题是我在尝试保存之前没有为页面设置元数据.工作代码如下.

设置页面元数据

if (metaDataSchemaUri != null)
            {
                Helpers.SetPageMetaData(metaDataSchemaUri, parentSgId, component, ref page);
            }

SetPageMetaData方法

 protected static void SetPageMetaData(TcmUri metaDataSchemaUri, TcmUri parentSgId, Component component, ref Page page)
        {
        TcmUri localMetaDataSchemaUri = TransformTcmUri(metaDataSchemaUri, parentSgId);
        page.MetadataSchema = (Schema)page.Session.GetObject(localMetaDataSchemaUri);
        ItemFields metaFields = new ItemFields((Schema)page.Session.GetObject(localMetaDataSchemaUri));
        Logging.Debug("Schema title: " + page.MetadataSchema.Title);
        // Set the page metadata

            TextField pageTitle = (TextField)metaFields["pagetitle"];
            pageTitle.Value = "The page title";
[...]
            KeywordField showbreadcrumb = (KeywordField)metaFields["showbreadcrumb"];
            showbreadcrumb.Value = new Keyword(TransformTcmUri(new TcmUri("tcm:134-12018-1024"), parentSgId), page.Session);
[...]
        }
        page.Metadata = metaFields.ToXml();
        Logging.Debug("Page metadata set");
    }

Answer 2

我能够在我自己的图像中复制你的错误.经过一番调查,我能够找出问题所在.错误"无法找到uuid:C42EE4FC-D2A2-49F5-92C7-BF6DCB014343:元数据"意味着设置架构是可以的,但它无法在Page的XML中找到该元素.您还必须明确设置.Metadata!以下是我成功保存页面并添加元数据架构的方法:

    private void SetMetadata(Page page, SaveEventArgs eventArgs, EventPhases phases)
    {
        try
        {
            Schema schema = (Schema)page.Session.GetObject("tcm:3-5806-8");

            if (page.MetadataSchema == null)
            {
                page.MetadataSchema = schema;
                ItemFields metadata = new ItemFields(schema);
                TextField showInNav = (TextField)metadata["showinmenu"];
                showInNav.Value = "No";
                page.Metadata = metadata.ToXml();
                SetPageMetadata.LogMessage("Set Page Metadata");
            }
        }
        catch (Exception e)
        {
            SetPageMetadata.LogMessage("An error occurred while rsetting the Page metadata:\n" + e.Message);
        }
    }