Lucene search code

predicate

public static Expression<Func<SearchModel, bool>> GetSearchPredicate(string searchTerm)
{
    var predicate = PredicateBuilder.True<SearchModel>(); // Items which meet the predicate

    // search logic cut down
    predicate = predicate.Or(x => x.DispalyName.Like(searchTerm)).Boost(60);

    // Only show items which are not excluded from search
    predicate = predicate.And(x => x.ExcludeFromSearch == false);

    return predicate;
}