如何让EntityDataSource允许我访问子实体？

public class ParentEntity
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ICollection<ChildEntity> ChildEntities { get; set; }
}

public class ChildEntity
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ParentEntity ParentEntity { get; set; }
}

public class MyDbContext : DbContext
{
    public DbSet<ParentEntity> ParentEntities { get; set; }
    public DbSet<ChildEntity> ChildEntities { get; set; }

    // ...
}

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<ParentEntity>()
        .HasMany(pe => pe.ChildEntities)
        .WithOne(ce => ce.ParentEntity)
        .HasForeignKey(ce => ce.ParentEntityId);
}

public async Task<IEnumerable<ParentEntity>> GetParentEntities()
{
    return await _context.ParentEntities
        .Include(pe => pe.ChildEntities)
        .ToListAsync();
}

@foreach (var parentEntity in Model)
{
    <div>
        <h3>@parentEntity.Name</h3>
        <ul>
            @foreach (var childEntity in parentEntity.ChildEntities)
            {
                <li>@childEntity.Name</li>
            }
        </ul>
    </div>
}