Computed Field based on Parent Name

In most of the case we might need to consider or facet based on parent element of a category.

• Products
  • Sports
    • Football
    • Cricket
    • Tennis
  • Electronics
    • Mobile
    • Laptop
    • Television
  • Apparels
    • Men’s wear
    • Women’s wear

Now lets say you’re using a Tree List field in a template to assign all types of Products and you’ve to filter based on 1st level of categories i.e, Sports – Electronics and Apparels and store in index.

Lets see how it is done,

1. 1. Create Computed Categories class to store all category details with its parent name
      

      public class Products : ComputedField
          {
              public override ID TagsSelector
              {
                  get
                  {
                      return new ID("{DC222D36-302A-492C-BFCA-71064B3D8B37}");
                  }
              }
          }
      
          public class SportsCategory : ComputedField
          {
              public override ID TagsSelector
              {
                  get
                  {
                      return new ID("{DC222D36-302A-492C-BFCA-71064B3D8B37}");
                  }
              }
              public override string ParentName
              {
                  get
                  {
                      return "Sports";
                  }
      
              }
      
          }
      
          public class ElectronicsCategory : ComputedField
          {
              public override ID TagsSelector
              {
                  get
                  {
                      return new ID("{DC222D36-302A-492C-BFCA-71064B3D8B37}");
                  }
              }
              public override string ParentName
              {
                  get
                  {
                      return "Electronics";
                  }
              }
          }
      
          public class ApparelsCategory : ComputedField
          {
              public override ID TagsSelector
              {
                  get
                  {
                      return new ID("{DC222D36-302A-492C-BFCA-71064B3D8B37}");
                  }
              }
              public override string ParentName
              {
                  get
                  {
                      return "Apparels";
                  }
              }
          }
       

   2. Resolve in computed field based on its parent name

 public abstract class ComputedField : IComputedIndexField
    {
        public virtual ID TagsSelector { get; set; }

        //Keeping it simple - Category Name
        public virtual string ParentName { get; set; }

        public virtual object ComputeFieldValue(IIndexable indexable)
        {
            var indexableItem = indexable as SitecoreIndexableItem;

            if (string.IsNullOrEmpty(ParentName))
                return indexableItem == null || TagsSelector.IsNull ? null : string.Join("|", indexableItem.Item.GetMultiListValues(TagsSelector).Select(tag =>  (tag.Fields["Name"] != null ? tag.Fields["Name"].Value : tag.Name)));
            else
                return indexableItem == null || TagsSelector.IsNull ? null : indexableItem.Item.GetMultiListValues(TagsSelector).Where(x => x.Parent.Name == ParentName).Select(tag => tag.Name).ToList();
        }

        public string FieldName { get; set; }
        public string ReturnType { get; set; }
    }

Finally add in config

        
          
            
              
                
              
              
                
              
              
                
              
              
                
              

            
          
          
            Namespace.ProductsCategory, Namespace
            Namespace.SportsCategory, Namespace
            Namespace.ApparelsCategory, Namespace
            Namespace.ElectronicsCategory, Namespace
          
        
      

Now data will get indexed based on parents.