Hi community,

I need implement role based protection for search results. I do it as in this blog-post http://thecogworks.co.uk/blog/2013/03/15/examiness-hints-and-tips-from-the-trenches-part-9-secure-searching but in my case I catch exception when call method umbraco.library.IsProtected(int DocumentId, string Path) where says:

Parameter name: umbracoContext at Umbraco.Web.UmbracoHelper..ctor(UmbracoContext umbracoContext) at umbraco.library.IsProtected(Int32 DocumentId, String Path) at WebSite.Extensions.ExamineEvents.InjectGroups(IndexingNodeDataEventArgs e) in D:\projects\WebSite\Extensions\ExamineEvents.cs:line 34 2016-10-06 17:18:56,938 [P10464/D2/T8] ERROR WebSite.Extensions.ExamineEvents - Value cannot be null.

There is my full code:

public class ExamineEvents : ApplicationEventHandler
{
    protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
    {
        ExamineManager.Instance.IndexProviderCollection["globalIndexer"].GatheringNodeData += ExamineEvents_GatheringNodeData;
    }

    private void ExamineEvents_GatheringNodeData(object sender, IndexingNodeDataEventArgs e)
    {
        InjectGroups(e);
    }

    private void InjectGroups(IndexingNodeDataEventArgs e)
    {
        try
        {
            var node = new Node(e.NodeId);
            if (umbraco.library.IsProtected(node.Id, node.Path))
            {
                var groups = Access.GetAccessingMembershipRoles(node.Id, node.Path);
                var groupsAccess = new StringBuilder();
                foreach (var group in groups)
                {
                    groupsAccess.Append(group);
                    groupsAccess.Append(" ");
                }
                e.Fields.Add("GroupAccess", groupsAccess.ToString().Trim());
                e.Fields.Add("IsPublic", "false");
            }
            else
            {
                e.Fields.Add("GroupAccess", "0");
                e.Fields.Add("IsPublic", "true");
            }
        }
        catch (Exception ex)
        {
            LogHelper.Error(GetType(), ex.Message, ex);
        }
    }
}

Any ideas how to resolve it? (Umbraco version 7.4.3)

Regards, Ivan.