Question

我有一个模板BrochuresComponent，它有一个名为Location的字段，它是一个droptree。现在，在sitecore模板中的字段上使用source，用户只能在此下拉选项中添加国家/地区项目或大陆项目。我希望玻璃将选项中的国家/地区项目映射到ICountry玻璃项目，将大陆项目映射到Icontinent玻璃项目。

但是当用户在下拉列表中选择一个选项时，会填充其中一个glassItem值，而其他值则会在其上显示评估错误，从而导致模型出错。以下是我的代码段。

我的玻璃界面如下所示：

    using Collette.Library.GlassItems.Objects.Taxonomy.Locations;
    using   Collette.Library.GlassItemsConstants.Objects.Page_Components.Destination_Page_Components;
    using Glass.Mapper.Sc.Configuration;
    using Glass.Mapper.Sc.Configuration.Attributes;

    namespace Collette.Library.GlassItems.Objects.Page_Components.Destination_Page_Components
    {
     [SitecoreType(TemplateId = BrochureComponentsConstants.TemplateIdString, AutoMap = true)]
     public interface IBrochuresComponent: IGlassItemEx
     {
          //Brochures Data Section
          [SitecoreField(FieldType = SitecoreFieldType.DropTree, FieldId = BrochureComponentsConstants.LocationItemFieldId, Setting = SitecoreFieldSettings.InferType)]
          ICountry Country { get; set; }

          [SitecoreField(FieldType = SitecoreFieldType.DropTree, FieldId = BrochureComponentsConstants.LocationItemFieldId, Setting = SitecoreFieldSettings.InferType)]
          IContinent Continent { get; set; }

   }
}

我的模型如下：

  var sitecoreContext = new SitecoreContext();
  BrochuresComponentItem = sitecoreContext.Cast<IBrochuresComponent>(DisplayItem); 
  //IF we specified a continent in dropdown it works fine since that is the first condition so it does not go to else,
  //but if we specify a country in the dropdown it breaks at the if condition below stating that templateid is empty string since nothing was evaluated.

不允许使用空字符串。参数名称：fieldName

  if (BrochuresComponentItem.Continent != null && BrochuresComponentItem.Continent.TemplateId.Equals(ContinentConstants.TemplateId))
   {
      SetBrochures(BrochuresComponentItem.Continent);
   }
   else if (BrochuresComponentItem.Country != null && BrochuresComponentItem.Country.TemplateId.Equals(CountryConstants.TemplateId))
   {
     SetBrochures(BrochuresComponentItem.Country);
   }

Answer 1

您对incrtype工作方式的实施/理解是错误的，请阅读Glass tutorial for Inferred Types。

为了使其正常工作，您的Country和Continent模板需要有一个共同的基础，然后您可以使用incrtype映射到特定类型：

 [SitecoreType(TemplateId = BrochureComponentsConstants.TemplateIdString, AutoMap = true)]
 public interface IBrochuresComponent: IGlassItemEx
 {
      //Brochures Data Section
      [SitecoreField(FieldType = SitecoreFieldType.DropTree, FieldId = BrochureComponentsConstants.LocationItemFieldId, Setting = SitecoreFieldSettings.InferType)]
      ILocationBase Location { get; set; }
}

然后在您的代码上，您可以检查它已映射到的类型：

if (BrochuresComponentItem.Location != null)
{
    if (BrochuresComponentItem.Location is ICountry)
    {
        //do country specific thing
    }
    else if (BrochuresComponentItem.Location is IContinent)
    {
        // do continent specific thing
    }
}

确保ICountry和IContinent的模型都从公共基接口继承，以匹配基础数据模板ILocationBase

Sitecore Glass Mapper推断类型Droptree字段与不同的模板项目

1 个答案: