Add HasAbpJsonConversion property builder extension

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/Modeling/AbpPropertyBuilderExtensions.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Volo.Abp.EntityFrameworkCore.ValueComparers;
+using Volo.Abp.EntityFrameworkCore.ValueConverters;
+
+namespace Volo.Abp.EntityFrameworkCore.Modeling;
+
+public static class AbpPropertyBuilderExtensions
+{
+    /// <summary>
+    /// Stores the property as a JSON serialized string with snapshot-based
+    /// change tracking.
+    /// </summary>
+    /// <remarks>
+    /// A fallback for EF Core providers without owned-JSON (ToJson) or primitive
+    /// collection mapping support. The value is converted as a whole: JSON path
+    /// querying and partial updates are not available, and the property type must
+    /// fully round-trip with System.Text.Json.
+    /// </remarks>
+    public static PropertyBuilder<TProperty> HasAbpJsonConversion<TProperty>(
+        this PropertyBuilder<TProperty> propertyBuilder)
+    {
+        return propertyBuilder.HasConversion(
+            new AbpJsonValueConverter<TProperty>(),
+            new AbpJsonValueComparer<TProperty>());
+    }
+}

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/ValueComparers/AbpJsonValueComparer.cs

@@ -0,0 +1,26 @@
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore.ChangeTracking;
+using Volo.Abp.EntityFrameworkCore.ValueConverters;
+
+namespace Volo.Abp.EntityFrameworkCore.ValueComparers;
+
+public class AbpJsonValueComparer<TPropertyType> : ValueComparer<TPropertyType>
+{
+    public AbpJsonValueComparer()
+        : base(
+            (left, right) => Serialize(left) == Serialize(right),
+            v => Serialize(v).GetHashCode(),
+            v => Deserialize(Serialize(v)))
+    {
+    }
+
+    private static string Serialize(TPropertyType? value)
+    {
+        return JsonSerializer.Serialize(value, AbpJsonValueConverter<TPropertyType>.SerializeOptions);
+    }
+
+    private static TPropertyType Deserialize(string value)
+    {
+        return JsonSerializer.Deserialize<TPropertyType>(value, AbpJsonValueConverter<TPropertyType>.DeserializeOptions)!;
+    }
+}

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/ValueComparers/AbpJsonValueComparer_Tests.cs

@@ -0,0 +1,74 @@
+using System.Collections.Generic;
+using Shouldly;
+using Volo.Abp.EntityFrameworkCore.ValueComparers;
+using Xunit;
+
+namespace Volo.Abp.EntityFrameworkCore.ValueComparers;
+
+public class AbpJsonValueComparer_Tests
+{
+    [Fact]
+    public void Should_Compare_Collections_By_Content()
+    {
+        var comparer = new AbpJsonValueComparer<List<string>>();
+
+        comparer.Equals(new List<string> { "a", "b" }, new List<string> { "a", "b" }).ShouldBeTrue();
+        comparer.Equals(new List<string> { "a", "b" }, new List<string> { "b", "a" }).ShouldBeFalse();
+        comparer.GetHashCode(new List<string> { "a", "b" })
+            .ShouldBe(comparer.GetHashCode(new List<string> { "a", "b" }));
+    }
+
+    [Fact]
+    public void Should_Handle_Null_Values()
+    {
+        var comparer = new AbpJsonValueComparer<List<string>>();
+
+        comparer.Equals(null, null).ShouldBeTrue();
+        comparer.Equals(new List<string>(), null).ShouldBeFalse();
+    }
+
+    [Fact]
+    public void Snapshot_Should_Be_A_Deep_Copy()
+    {
+        var comparer = new AbpJsonValueComparer<List<string>>();
+        var original = new List<string> { "a" };
+
+        var snapshot = (List<string>)comparer.Snapshot(original)!;
+        original.Add("b");
+
+        snapshot.ShouldBe(new[] { "a" });
+        comparer.Equals(original, snapshot).ShouldBeFalse();
+    }
+
+    [Fact]
+    public void Snapshot_Should_Copy_Nested_Arrays_Of_Typed_Objects()
+    {
+        var comparer = new AbpJsonValueComparer<SampleData>();
+        var original = new SampleData { Count = 1, Tags = new[] { "x" } };
+
+        var snapshot = (SampleData)comparer.Snapshot(original)!;
+        original.Tags[0] = "changed";
+        original.Count = 2;
+
+        snapshot.Tags.ShouldBe(new[] { "x" });
+        snapshot.Count.ShouldBe(1);
+        comparer.Equals(original, snapshot).ShouldBeFalse();
+    }
+
+    [Fact]
+    public void Should_Support_Nullable_Value_Types()
+    {
+        var comparer = new AbpJsonValueComparer<int?>();
+
+        comparer.Equals(42, 42).ShouldBeTrue();
+        comparer.Equals(42, 43).ShouldBeFalse();
+        comparer.Equals(null, null).ShouldBeTrue();
+    }
+
+    private class SampleData
+    {
+        public int Count { get; set; }
+
+        public string[] Tags { get; set; } = default!;
+    }
+}

modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs

@@ -1,8 +1,6 @@
 using System;
-using System.Text.Json;
 using JetBrains.Annotations;
 using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.ChangeTracking;
 using Volo.Abp.EntityFrameworkCore.Modeling;
 using Volo.Abp.Users.EntityFrameworkCore;
 
@@ -194,18 +192,11 @@ public static class IdentityDbContextModelBuilderExtensions
             {
                 /* MySQL providers do not support EF Core JSON columns (ToJson),
                  * so store Data as a serialized json column with the same column
-                 * name and content. The comparer detects in-place mutations
-                 * (e.g. sign count updates on login). */
+                 * name and content. */
                 b.Property(p => p.Data)
                     .HasColumnName(nameof(IdentityUserPasskey.Data))
                     .HasColumnType("json")
-                    .HasConversion(
-                        d => JsonSerializer.Serialize(d, (JsonSerializerOptions?)null),
-                        s => JsonSerializer.Deserialize<IdentityPasskeyData>(s, (JsonSerializerOptions?)null)!,
-                        new ValueComparer<IdentityPasskeyData>(
-                            (l, r) => JsonSerializer.Serialize(l, (JsonSerializerOptions?)null) == JsonSerializer.Serialize(r, (JsonSerializerOptions?)null),
-                            v => JsonSerializer.Serialize(v, (JsonSerializerOptions?)null).GetHashCode(),
-                            v => JsonSerializer.Deserialize<IdentityPasskeyData>(JsonSerializer.Serialize(v, (JsonSerializerOptions?)null), (JsonSerializerOptions?)null)!));
+                    .HasAbpJsonConversion();
             }
             else
             {