Property source level variation should only be applied when configured (#16270)

Author: kjac

src/Umbraco.PublishedCache.NuCache/Property.cs

@@ -25,7 +25,7 @@ internal class Property : PublishedPropertyBase
     // the invariant-neutral source and inter values
     private readonly object? _sourceValue;
     private readonly ContentVariation _variations;
-    private bool _sourceValueIsInvariant;
+    private readonly ContentVariation _sourceVariations;
 
     // the variant and non-variant object values
     private CacheValues? _cacheValues;
@@ -88,7 +88,7 @@ public Property(
         // this variable is used for contextualizing the variation level when calculating property values.
         // it must be set to the union of variance (the combination of content type and property type variance).
         _variations = propertyType.Variations | content.ContentType.Variations;
-        _sourceValueIsInvariant = propertyType.Variations is ContentVariation.Nothing;
+        _sourceVariations = propertyType.Variations;
     }
 
     // clone for previewing as draft a published content that is published and has no draft
@@ -104,7 +104,7 @@ public Property(Property origin, PublishedContent content)
         _isMember = origin._isMember;
         _publishedSnapshotAccessor = origin._publishedSnapshotAccessor;
         _variations = origin._variations;
-        _sourceValueIsInvariant = origin._sourceValueIsInvariant;
+        _sourceVariations = origin._sourceVariations;
     }
 
     // used to cache the CacheValues of this property
@@ -148,9 +148,14 @@ public override bool HasValue(string? culture = null, string? segment = null)
 
     public override object? GetSourceValue(string? culture = null, string? segment = null)
     {
-        _content.VariationContextAccessor.ContextualizeVariation(_variations, _content.Id, ref culture, ref segment);
+        _content.VariationContextAccessor.ContextualizeVariation(_sourceVariations, _content.Id, ref culture, ref segment);
+
+        // source values are tightly bound to the property/schema culture and segment configurations, so we need to
+        // sanitize the contextualized culture/segment states before using them to access the source values.
+        culture = _sourceVariations.VariesByCulture() ? culture : string.Empty;
+        segment = _sourceVariations.VariesBySegment() ? segment : string.Empty;
 
-        if (_sourceValueIsInvariant || (culture == string.Empty && segment == string.Empty))
+        if (culture == string.Empty && segment == string.Empty)
         {
             return _sourceValue;
         }

tests/Umbraco.Tests.UnitTests/Umbraco.Core/Published/PublishedContentVarianceTests.cs

@@ -76,6 +76,28 @@ public void Content_Culture_And_Segment_Variation_Can_Get_Culture_And_Segment_Va
         Assert.AreEqual(expectedValue, value);
     }
 
+    [TestCase(DaCulture, Segment1, "DaDk property value")]
+    [TestCase(DaCulture, Segment2, "DaDk property value")]
+    [TestCase(EnCulture, Segment1, "EnUs property value")]
+    [TestCase(EnCulture, Segment2, "EnUs property value")]
+    public void Content_Culture_And_Segment_Variation_Can_Get_Culture_Variant_Property(string culture, string segment, string expectedValue)
+    {
+        var content = CreatePublishedContent(ContentVariation.CultureAndSegment, ContentVariation.Culture, variationContextCulture: culture, variationContextSegment: segment);
+        var value = GetPropertyValue(content);
+        Assert.AreEqual(expectedValue, value);
+    }
+
+    [TestCase(DaCulture, Segment1, "Segment1 property value")]
+    [TestCase(DaCulture, Segment2, "Segment2 property value")]
+    [TestCase(EnCulture, Segment1, "Segment1 property value")]
+    [TestCase(EnCulture, Segment2, "Segment2 property value")]
+    public void Content_Culture_And_Segment_Variation_Can_Get_Segment_Variant_Property(string culture, string segment, string expectedValue)
+    {
+        var content = CreatePublishedContent(ContentVariation.CultureAndSegment, ContentVariation.Segment, variationContextCulture: culture, variationContextSegment: segment);
+        var value = GetPropertyValue(content);
+        Assert.AreEqual(expectedValue, value);
+    }
+
     private object? GetPropertyValue(IPublishedContent content) => content.GetProperty(PropertyTypeAlias)!.GetValue();
 
     private IPublishedContent CreatePublishedContent(ContentVariation contentTypeVariation, ContentVariation propertyTypeVariation, string? variationContextCulture = null, string? variationContextSegment = null)