Ensure entities type in content caches GetById(Udi)

src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs

@@ -106,11 +106,19 @@ namespace Umbraco.Web.PublishedCache
         {
             var guidUdi = contentId as GuidUdi;
             if (guidUdi == null)
-                throw new InvalidOperationException("UDIs for content items must be " + typeof(GuidUdi));
+                throw new ArgumentException($"Udi must be of type {typeof(GuidUdi).Name}.", nameof(contentId));
+
+            if (guidUdi.EntityType != UdiEntityType)
+                throw new ArgumentException($"Udi entity type must be \"{UdiEntityType}\".", nameof(contentId));
 
             return GetById(preview, guidUdi.Guid);
         }
 
+        /// <summary>
+        /// Gets the entity type.
+        /// </summary>
+        protected abstract string UdiEntityType { get; }
+
         /// <summary>
         /// Gets content at root.
         /// </summary>

src/Umbraco.Web/PublishedCache/ContextualPublishedContentCache.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using Umbraco.Core;
 using Umbraco.Core.Models;
 using Umbraco.Web.PublishedCache.XmlPublishedCache;
 
@@ -21,6 +22,8 @@ namespace Umbraco.Web.PublishedCache
             : base(umbracoContext, cache)
         { }
 
+        protected override string UdiEntityType => Constants.UdiEntityType.Document;
+
         public override IPublishedContent GetById(bool preview, Guid contentKey)
         {
             if (InnerCache is PublishedContentCache cc)

src/Umbraco.Web/PublishedCache/ContextualPublishedMediaCache.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using Umbraco.Core;
 using Umbraco.Core.Models;
 using Umbraco.Web.PublishedCache.XmlPublishedCache;
 
@@ -21,6 +22,8 @@ namespace Umbraco.Web.PublishedCache
             : base(umbracoContext, cache)
         { }
 
+        protected override string UdiEntityType => Constants.UdiEntityType.Media;
+
         public override IPublishedContent GetById(bool preview, Guid contentKey)
         {
             if (InnerCache is PublishedMediaCache cc)