Use filters to narrow down search results or for database-like queries. This topic explains how to filter search results based on boolean fields, with the Filter method in Episerver Search & Navigation (formerly Episerver Find).
You can use the Filter method to filter boolean and nullable boolean fields in a couple of ways, as shown in the following use cases and examples.
To search for documents where a boolean field has a value, use the Exists method. The following search finds blog posts that have an Approved property with a value. The below code is similar to the LINQ query Where(x => x.Approved.HasValue).
var searchQuery = client.Search<BlogPost>() .Filter(x => x.Approved.Exists());
You can negate the filter with an exclamation mark (!); to instead find all blog posts that lack an Approved property, use the following code.
var searchQuery = client.Search<BlogPost>() .Filter(x => !x.Approved.Exists());
For exact matching, use the Match method. The following search matches blog posts whose Approved property is true. The LINQ equivalent is Where(x => x.Approved).
var searchQuery = client.Search<BlogPost>() .Filter(x => x.Approved.Match(true));
Last updated: Oct 31, 2016