From c0517c35629907af4b312007362fb27abca2143f Mon Sep 17 00:00:00 2001
From: Kenn Jacobsen <kja@umbraco.dk>
Date: Tue, 14 Jan 2025 10:40:45 +0100
Subject: [PATCH] Allow filtering for multiple content types (#17960)

---
 .../Querying/Filters/ContentTypeFilter.cs             | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/Umbraco.Cms.Api.Delivery/Querying/Filters/ContentTypeFilter.cs b/src/Umbraco.Cms.Api.Delivery/Querying/Filters/ContentTypeFilter.cs
index 13d9dc77ec..50c390c766 100644
--- a/src/Umbraco.Cms.Api.Delivery/Querying/Filters/ContentTypeFilter.cs
+++ b/src/Umbraco.Cms.Api.Delivery/Querying/Filters/ContentTypeFilter.cs
@@ -1,6 +1,5 @@
 using Umbraco.Cms.Api.Delivery.Indexing.Filters;
 using Umbraco.Cms.Core.DeliveryApi;
-using Umbraco.Extensions;
 
 namespace Umbraco.Cms.Api.Delivery.Querying.Filters;
 
@@ -15,15 +14,15 @@ public sealed class ContentTypeFilter : IFilterHandler
     /// <inheritdoc/>
     public FilterOption BuildFilterOption(string filter)
     {
-        var alias = filter.Substring(ContentTypeSpecifier.Length);
+        var filterValue = filter.Substring(ContentTypeSpecifier.Length);
+        var negate = filterValue.StartsWith('!');
+        var aliases = filterValue.TrimStart('!').Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
 
         return new FilterOption
         {
             FieldName = ContentTypeFilterIndexer.FieldName,
-            Values = alias.IsNullOrWhiteSpace() == false
-                ? new[] { alias.TrimStart('!') }
-                : Array.Empty<string>(),
-            Operator = alias.StartsWith('!')
+            Values = aliases,
+            Operator = negate
                 ? FilterOperation.IsNot
                 : FilterOperation.Is
         };