Fix validation generator to ignore properties with [FromServices] or [FromKeyedServices] attributes

src/Validation/gen/Extensions/ITypeSymbolExtensions.cs

@@ -138,4 +138,18 @@ attr.AttributeClass is not null &&
             (attr.AttributeClass.ImplementsInterface(fromServiceMetadataSymbol) ||
              SymbolEqualityComparer.Default.Equals(attr.AttributeClass, fromKeyedServiceAttributeSymbol)));
     }
+
+    /// <summary>
+    /// Checks if the property is marked with [FromService] or [FromKeyedService] attributes.
+    /// </summary>
+    /// <param name="property">The property to check.</param>
+    /// <param name="fromServiceMetadataSymbol">The symbol representing the [FromService] attribute.</param>
+    /// <param name="fromKeyedServiceAttributeSymbol">The symbol representing the [FromKeyedService] attribute.</param>
+    internal static bool IsServiceProperty(this IPropertySymbol property, INamedTypeSymbol fromServiceMetadataSymbol, INamedTypeSymbol fromKeyedServiceAttributeSymbol)
+    {
+        return property.GetAttributes().Any(attr =>
+            attr.AttributeClass is not null &&
+            (attr.AttributeClass.ImplementsInterface(fromServiceMetadataSymbol) ||
+             SymbolEqualityComparer.Default.Equals(attr.AttributeClass, fromKeyedServiceAttributeSymbol)));
+    }
 }

src/Validation/gen/Parsers/ValidationsGenerator.TypesParser.cs

@@ -110,6 +110,11 @@ internal ImmutableArray<ValidatableProperty> ExtractValidatableMembers(ITypeSymb
         var members = new List<ValidatableProperty>();
         var resolvedRecordProperty = new List<IPropertySymbol>();
 
+        var fromServiceMetadataSymbol = wellKnownTypes.Get(
+            WellKnownTypeData.WellKnownType.Microsoft_AspNetCore_Http_Metadata_IFromServiceMetadata);
+        var fromKeyedServiceAttributeSymbol = wellKnownTypes.Get(
+            WellKnownTypeData.WellKnownType.Microsoft_Extensions_DependencyInjection_FromKeyedServicesAttribute);
+
         // Special handling for record types to extract properties from
         // the primary constructor.
         if (typeSymbol is INamedTypeSymbol { IsRecord: true } namedType)
@@ -137,6 +142,12 @@ internal ImmutableArray<ValidatableProperty> ExtractValidatableMembers(ITypeSymb
                     {
                         resolvedRecordProperty.Add(correspondingProperty);
 
+                        // Skip parameters that are injected as services
+                        if (parameter.IsServiceParameter(fromServiceMetadataSymbol, fromKeyedServiceAttributeSymbol))
+                        {
+                            continue;
+                        }
+
                         // Check if the property's type is validatable, this resolves
                         // validatable types in the inheritance hierarchy
                         var hasValidatableType = TryExtractValidatableType(
@@ -162,13 +173,19 @@ internal ImmutableArray<ValidatableProperty> ExtractValidatableMembers(ITypeSymb
         {
             // Skip compiler generated properties and properties already processed via
             // the record processing logic above.
-            if (member.IsImplicitlyDeclared 
-                || member.IsEqualityContract(wellKnownTypes) 
+            if (member.IsImplicitlyDeclared
+                || member.IsEqualityContract(wellKnownTypes)
                 || resolvedRecordProperty.Contains(member, SymbolEqualityComparer.Default))
             {
                 continue;
             }
 
+            // Skip properties that are injected as services
+            if (member.IsServiceProperty(fromServiceMetadataSymbol, fromKeyedServiceAttributeSymbol))
+            {
+                continue;
+            }
+
             var hasValidatableType = TryExtractValidatableType(member.Type, wellKnownTypes, ref validatableTypes, ref visitedTypes);
             var attributes = ExtractValidationAttributes(member, wellKnownTypes, out var isRequired);
 

src/Validation/test/Microsoft.Extensions.Validation.GeneratorTests/ValidationsGenerator.ComplexType.cs

@@ -21,10 +21,12 @@ public async Task CanValidateComplexTypes()
 using Microsoft.Extensions.Validation;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.AspNetCore.Mvc;
 
 var builder = WebApplication.CreateBuilder();
 
 builder.Services.AddValidation();
+builder.Services.AddSingleton<TestService>();
 
 var app = builder.Build();
 
@@ -58,6 +60,10 @@ public class ComplexType
 
     [DerivedValidation, Range(10, 100)]
     public int PropertyWithMultipleAttributes { get; set; } = 10;
+
+    [FromServices]
+    [Required] // This should be ignored because of [FromServices]
+    public TestService ServiceProperty { get; set; } = null!;
 }
 
 public class DerivedValidationAttribute : ValidationAttribute
@@ -96,6 +102,12 @@ public static ValidationResult Validate(int number, ValidationContext validation
         return ValidationResult.Success;
     }
 }
+
+public class TestService
+{
+    [Range(10, 100)]
+    public int Value { get; set; } = 4;
+}
 """;
         await Verify(source, out var compilation);
         await VerifyEndpoint(compilation, "/complex-type", async (endpoint, serviceProvider) =>

src/Validation/test/Microsoft.Extensions.Validation.GeneratorTests/ValidationsGenerator.RecordType.cs

@@ -21,10 +21,12 @@ public async Task CanValidateRecordTypes()
 using Microsoft.Extensions.Validation;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.AspNetCore.Mvc;
 
 var builder = WebApplication.CreateBuilder();
 
 builder.Services.AddValidation();
+builder.Services.AddSingleton<TestService>();
 
 var app = builder.Build();
 
@@ -48,6 +50,10 @@ public record SubTypeWithoutConstructor
 
     [StringLength(10)]
     public string? StringWithLength { get; set; }
+
+    [FromServices]
+    [Required]
+    public TestService ServiceProperty { get; set; } = null!;
 }
 
 public static class CustomValidators
@@ -66,6 +72,12 @@ public static ValidationResult Validate(int number, ValidationContext validation
     }
 }
 
+public class TestService
+{
+    [Range(10, 100)]
+    public int Value { get; set; } = 4;
+}
+
 public record ValidatableRecord(
     [Range(10, 100)]
     int IntegerWithRange = 10,
@@ -81,7 +93,9 @@ public record ValidatableRecord(
     [CustomValidation(typeof(CustomValidators), nameof(CustomValidators.Validate))]
     int IntegerWithCustomValidation = 0,
     [DerivedValidation, Range(10, 100)]
-    int PropertyWithMultipleAttributes = 10
+    int PropertyWithMultipleAttributes = 10,
+    [FromServices] [Required] TestService ServiceProperty = null!, // This should be ignored because of [FromServices]
+    [FromKeyedServices("serviceKey")] [Range(10, 100)] int KeyedServiceProperty = 5 // This should be ignored because of [FromKeyedServices]
 );
 """;
         await Verify(source, out var compilation);