Newtonsoft JSON Serialization error

[Daniele-Tentoni]

Hi all,
I've a problem when trying to retreive some data from barrel. In this code

try 
{
    if(barrel.Exists("profile")) 
{
        var cache = FileSystem.CacheDirectory;
        var data = FileSystem.AppDataDirectory;
        var profile = this.barrel.Get<Profile>("profile");
        return profile ?? new Profile();
    }
} 
catch(Exception e) 
{
    Debug.WriteLine(e.StackTrace);
}

I get the error

Type specified in JSON 'System.Reflection.RuntimeMethodInfo, mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' is not compatible with 'System.IntPtr, mscorlib, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'. Path 'SaveProfileAction.Method.$type', line 1, position 177.

I've saved a profile before read with

barrel.Add("profile", profile, TimeSpan.FromDays(365));

In my Profile class I've

public class Profile : ObservableObject
{
    [JsonIgnore]
    public Action SaveProfileAction { get; set; }

    private string dream = string.Empty;
    public string Dream
    {
        get => dream;
        set => SetProperty(ref dream, value, onChanged: SaveProfileAction);
    }

    private string name = string.Empty;
    public string Name
    {
        get => name;
        set
        {
            var force = false;
            if (value.Length > 15)
            {
                value = value.Substring(0, 15);
                force = true;
            }

            SetProperty(ref name, value, onChanged: SaveProfileAction);
            if (force)
                OnPropertyChanged();
        }
    }

    private string preferredLocation = string.Empty;
    public string PreferredLocation
    {
        get => preferredLocation;
        set
        {
            var force = false;
            if(value.Length > 30)
            {
                value = value.Substring(0, 30);
                force = true;
            }

            SetProperty(ref preferredLocation, value, onChanged: SaveProfileAction);
            if (force)
                OnPropertyChanged();
        }
    }
}

What I understand from the error is that he try to retreive the SaveActionProfile property in the json string but he can't do that. Any idea?

Sorry for my poor English.

[jamesmontemagno]

That code looks familiar :)

So I am thinking that somehow SaveProfileAction got saved in your json and that isn't compatible. Try to delete the file first and re-save it.

[Daniele-Tentoni]

I've tried to make a "MockStore" to test the behaviour

public class MockBarrel 
{
    readonly IBarrel barrel;
    readonly object locker = new object();
    public MockBarrel()
    {
        Barrel.ApplicationId = AppInfo.PackageName;
        barrel = Barrel.Create(FileSystem.AppDataDirectory);
    }

    public MockItem GetMockItem()
    {
        lock (locker)
        {
            var item = barrel.Get<MockItem>("item");
            return item ?? new MockItem();
        }
    }

    public void SaveMockItem(MockItem item)
    {
        lock (locker)
        {
            barrel.Add("item", item, TimeSpan.FromDays(365));
        }
    }

The model is

public class MockItem
{
    public string Id { get; set; }
    public string Text { get; set; }
}

This this code all work good

var mock = new MockBarrel();
mock.SaveMockItem(new Models.MockItem { Id = "1", Text = "Some text" });
var item = mock.GetMockItem();

Now my question is: can the problem be made by calling the Get from an instance of my service different from the instance that do the Add? In the mock example I make all this step in only one shot.