Do extra processing for init-only fields (#32342)

Fixes #32310

src/EFCore.Relational/Query/RelationalShapedQueryCompilingExpressionVisitor.ShaperProcessingExpressionVisitor.cs

@@ -2063,7 +2063,9 @@ protected override Expression VisitBinary(BinaryExpression node)
  OrElse(
  ReferenceEqual(currentVariable, Constant(null)),
  ReferenceEqual(parameter, Constant(null))),
- MakeBinary(node.NodeType, node.Left, parameter),
+ node is { NodeType: ExpressionType.Assign, Left: MemberExpression leftMemberExpression }
+ ? leftMemberExpression.Assign(parameter)
+ : MakeBinary(node.NodeType, node.Left, parameter),
  Call(
  PopulateListMethod.MakeGenericMethod(property.ClrType.TryGetElementType(typeof(IEnumerable<>))!),
  parameter,

test/EFCore.Relational.Specification.Tests/Query/JsonQueryAdHocTestBase.cs

@@ -8,6 +8,70 @@ public abstract class JsonQueryAdHocTestBase : NonSharedModelTestBase
  protected override string StoreName
  => "JsonQueryAdHocTest";
 
+ #region 32310
+
+ [ConditionalTheory]
+ [MemberData(nameof(IsAsyncData))]
+ public virtual async Task Contains_on_nested_collection_with_init_only_navigation(bool async)
+ {
+ var contextFactory = await InitializeAsync<MyContext32310>(seed: Seed32310);
+ await using var context = contextFactory.CreateContext();
+
+ var query = context.Pubs
+ .Where(u => u.Visits.DaysVisited.Contains(new DateOnly(2023, 1, 1)));
+
+ var result = async
+ ? await query.FirstOrDefaultAsync()!
+ : query.FirstOrDefault()!;
+
+ Assert.Equal("FBI", result.Name);
+ Assert.Equal(new DateOnly(2023, 1, 1), result.Visits.DaysVisited.Single());
+ }
+
+ protected virtual void Seed32310(MyContext32310 context)
+ {
+ var user = new Pub32310
+ {
+ Name = "FBI",
+ Visits = new Visits32310
+ {
+ LocationTag = "tag",
+ DaysVisited = new List<DateOnly> { new(2023, 1, 1) }
+ }
+ };
+
+ context.Add(user);
+ context.SaveChanges();
+ }
+
+ protected class MyContext32310 : DbContext
+ {
+ public MyContext32310(DbContextOptions options)
+ : base(options)
+ {
+ }
+
+ public DbSet<Pub32310> Pubs => Set<Pub32310>();
+
+ protected override void OnModelCreating(ModelBuilder modelBuilder)
+ => modelBuilder.Entity<Pub32310>(b => { b.OwnsOne(e => e.Visits).ToJson(); });
+ }
+
+ public class Pub32310
+ {
+ public int Id { get; set; }
+ public required string Name { get; set; }
+ public Visits32310 Visits { get; set; } = null!;
+ }
+
+ public class Visits32310
+ {
+ public string LocationTag { get; set; }
+ public required List<DateOnly> DaysVisited { get; init; }
+ }
+
+ #endregion
+
  #region 29219
 
  [ConditionalTheory]
@@ -893,7 +957,7 @@ public class MyJsonEntityLazyLoadingProxies
  }
 
  #endregion
- 
+
  #region NotICollection
 
  [ConditionalTheory]