Sxa tokens not taken into account in code query

Question

I am working on a custom field which is based on :https://marketplace.sitecore.net/en/Modules/A/Advance_Image_Field.aspx

I am trying to make it suitable for SXA by changing the way to find thumbnails. So instead of looking for an ID I would like to use query with SXA tokens.

Sadly it throws an error :

Field control has failed to render: End of string expected at position 5.Details Sitecore.Data.Query.ParseException: End of string expected at position 5. at Sitecore.Data.Query.QueryParser.Raise(String error) at Sitecore.Data.Query.QueryParser.DoParse(String query) at Sitecore.Data.Query.Query..ctor(String query) at Sitecore.Data.Query.Query.SelectSingleItem(String query, QueryContext contextNode, Database database) at Sitecore.Data.DefaultDatabase.SelectSingleItem(String query) at HagerDeep.Foundation.Media.Fields.ImageWithFocusCrop.GetThumbnails() in D:\BitBucket\DEEP2\src\Foundation\Media\code\Fields\ImageWithFocusCrop.cs:line 639 at HagerDeep.Foundation.Media.Fields.ImageWithFocusCrop.DoRender(HtmlTextWriter output) in D:\BitBucket\DEEP2\src\Foundation\Media\code\Fields\ImageWithFocusCrop.cs:line 202 at Sitecore.Web.UI.WebControl.Render(HtmlTextWriter output) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at Sitecore.Shell.Applications.ContentEditor.EditorFieldContainer.RenderChildren(HtmlTextWriter writer)

Here's my code that throw the error:

var thumbnailFolderItem = Client.ContentDatabase.SelectSingleItem(ThumbnailsFolderQuery);

With the following query using SXA token :

query:$site/*[@@name='Presentation']/*[@@name='Thumbnails Ratio']/*[@@name='Fallback Thumbnail Folder']

Do I use the right function ? Or does the SXA tokens are not supported in code ?

Answer 1

Inject ITokenResolver and call Resolve() method.

ITokenResolver tokenResolver = ServiceLocator.ServiceProvider.GetService<ITokenResolver>()
string query = tokenResolver.Resolve(MY_QUERY, CONTEXT_ITEM);

and then for example:

CONTEXT_ITEM.Axes.SelectItems(query)

You can, of course, use construction injection instead of using ServiceLocator for getting ITokenResolver.

Answer 2

Here's my solution:

1. I am using 3.7.1 version of the Sitecore.XA.Foundation.TokenResolution.dll so there is no service for token resolution but a static class.
2. Then for getting current item it was really easy actually... Just add a property in my custom field.

Use those if Sitecore.XA.Foundation.TokenResolution is 3.8.0 or above

• using Sitecore.DependencyInjection;
• using Microsoft.Extensions.DependencyInjection;

In my case only that one was useful since it's not a service in 3.7.1

• using Sitecore.XA.Foundation.TokenResolution;

  public class ImageWithFocusCrop : LinkBase
  {
      //Will get the target item ID
      public string ItemID { get; set; }
  
      private string GetThumbnails()
      {
           var targetItemID = ItemID;
           var targetItem = Client.ContentDatabase.GetItem(new Sitecore.Data.ID(targetItemID));
           //For 3.8.0 version and above
           ITokenResolver tokenResolver = ServiceLocator.ServiceProvider.GetService<ITokenResolver>();
           string query = tokenResolver.Resolve(ThumbnailsFolderQuery, targetItem );
           //For 3.7.1 version
           string query = TokenResolver.Resolve(ThumbnailsFolderQuery, targetItem);
  
           var thumbnailFolderItem = targetItem.Axes.SelectItems(query);
      }
  }