ObservableObjectAttribute does not work on a record

[DrPepperBianco]

Describe the bug

The purpose of the ObservableObjectAttribute is, to add Member of ObservableObject to a type, that itself cannot derive from ObservableObject.

That is actually the case for record classes‌.

Because ObservableObject is a class and not a record class, a record class cannot derive from it.

But if I put [ObservableObject] on my partial record class there is no source generated.

Regression

No response

Steps to reproduce

1. Multi-Target: net472 and net6.0 (with LangVersion=12), project Type WinExe with WPF, VS 17.11.0
2. Use the following Code: 
namespace Test;

using CommunityToolkit.Mvvm.ComponentModel;

[ObservableObject]
public partial record class MyObservableRecord(string Name)
{
    private string _Name = Name;
    public string Name
    {
        get => _Name;
        set 
        {
            OnPropertyChanging(nameof(Name));
            _Name = value;
            OnPropertyChanged(nameof(Name));
        }
    }
}

3. Compile
4. Error:
   > error CS0103: The name 'OnPropertyChanging' does not exist in the current context
   > error CS0103: The name 'OnPropertyChanged' does not exist in the current context
5. If you replace `record class` with `class` the same code works.

Expected behavior

The expected behaviour would be, that the methods "OnPropertyChanging" and "OnPropertyChanged" (among others) should be generated and be available at compile time.

Screenshots

No response

IDE and version

VS 2022

IDE version

17.11

Nuget packages

• [ ] CommunityToolkit.Common
• [ ] CommunityToolkit.Diagnostics
• [ ] CommunityToolkit.HighPerformance
• [X] CommunityToolkit.Mvvm (aka MVVM Toolkit)

Nuget package version(s)

8.2.2 (but also doesn’t work with 8.3.0)

Additional context

No response

Help us help you

No, just wanted to report this

[pierre01]

Isn't the purpose of a record to be immutable? Making it an ObservableObject complicates this a lot. I have seen the use of records on structs but rarely in classes. What stops you from using a class? you could wrap your record (UserRecord) in the Observable class? May be I am missing something.

public class ObservableUser : ObservableObject
{
    private readonly UserRecord user;

    public ObservableUser(UserRecord user) => this.user = user;

    public string Name
    {
        get => user.Name;
        set => SetProperty(user.Name, value, user, (u, n) => u.Name = n);
    }
}