Group search results by custom content type category

Question

Hi 
 
 I have implemened search for my custom content type: 
 SearchIndexDocument doc = Apis.Get<ISearchIndexing>().NewDocument(roadTestItem.ContentId, roadTestItem.ContentTypeId,
 RoadTestConstants.RoadTestItemName, roadTestItem.Url, roadTestItem.HtmlName("web"), roadTestItem.HtmlDescription("web"));
doc.AddField(searchIndexing.Constants.IsContent, true.ToString());
doc.AddField(searchIndexing.Constants.ContentID, roadTestItem.ContentId.ToString());
doc.AddField(searchIndexing.Constants.Date, searchIndexing.FormatDate(roadTestItem.CreatedDate));
doc.AddField(searchIndexing.Constants.CollapseField, RoadTestConstants.RoadTestItemNames + ":" + roadTestItem.Name);
doc.AddField(searchIndexing.Constants.Category, RoadTestConstants.RoadTestItemNames);
doc.AddField(searchIndexing.Constants.ApplicationType, RoadTestConstants.RoadTestItemApplicationName);

.... but in search results I still see all my contents in the "All" tab instead of some category: 
 Can anyone suggest me?

Mathew D&#39;Amico · Accepted Answer

Those filters are defined by ISearchCategories Plugin Type . You will need to implement that interface and add your new category. Then when indexing your custom content you would set the same category on those items. 
 This will also add the same filter to the search page in the Anything dropdown. 
 Here is the code used by the Ideas Application to implement the ISearchCategories interface. 
 using Telligent.Evolution.Extensibility.Api.Entities.Version1;
using Telligent.Evolution.Extensibility.Content.Version1;
using Telligent.Evolution.Extensibility.Version1;

namespace Telligent.Evolution.Ideation.Plugins
{
 public class IdeaSearchCategories : IPlugin, ISearchCategories, ITranslatablePlugin
 {
 ITranslatablePluginController _translations;

 public const string IdeaSearchCategory = "ideas";

 #region IPlugin Members

 public string Name
 {
 get { return "Ideas Search Categories"; }
 }

 public string Description
 {
 get { return "Adds search-related categories to support ideas being indexed."; }
 }

 public void Initialize()
 {
 }

 #endregion

 #region ISearchCategories Members

 public SearchCategory[] GetCategories()
 {
 return new SearchCategory[] { 
 new SearchCategory (IdeaSearchCategory, _translations.GetLanguageResourceValue("Ideas_Search_Category_Name"))
 };
 }

 #endregion

 #region ITranslatablePlugin Members

 public Translation[] DefaultTranslations
 {
 get
 {
 var translation = new Translation("en-US");
 translation.Set("Ideas_Search_Category_Name", "Ideas");

 return new Translation[] { translation };
 }
 }

 public void SetController(ITranslatablePluginController controller)
 {
 _translations = controller;
 }

 #endregion
 }
}

Group search results by custom content type category

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