/// <summary>
/// Gets the expression.
/// </summary>
/// <param name="entityType">Type of the entity.</param>
/// <param name="serviceInstance">The service instance.</param>
/// <param name="parameterExpression">The parameter expression.</param>
/// <param name="selection">The selection.</param>
/// <returns></returns>
public override Expression GetExpression(Type entityType, IService serviceInstance, ParameterExpression parameterExpression, string selection)
{
string[] selectionValues = selection.Split('|');
if (selectionValues.Length >= 2)
{
Guid tagGuid = selectionValues[1].AsGuid();
var tagItemQry = new TaggedItemService((RockContext)serviceInstance.Context).Queryable()
.Where(x => x.Tag.Guid == tagGuid);
var qry = new PersonService((RockContext)serviceInstance.Context).Queryable()
.Where(p => tagItemQry.Any(x => x.EntityGuid == p.Guid));
return(FilterExpressionExtractor.Extract <Rock.Model.Person>(qry, parameterExpression, "p"));
}
return(null);
}