bug: entity resolver argument parser fails to map to objects

[dariuszkuc]

Argument parser currently is only able to map scalar values. Attempting to use an object as an argument in [EntityResolver] leads to runtime errors.

[Key("bar { baz }")]
public class Foo
{

    public Foo(Bar bar, string? name)
    {
        Bar = bar;
        Name = name;   
    }

    public Bar bar { get; }
    public string? Name { get; }

    [ReferenceResolver]
    public static Foo? GetFooByBarBaz{
        Bar bar,
        Data repository)
    {
        // TODO implement logic
       return null;
    }
}

public class Bar {

    public Bar(string baz)
    {
        Baz = baz;
    }

    public Baz baz { get; }
}

Following workarounds are available

1. map scalar arguments instead

    [ReferenceResolver]
    public static Foo? GetFooByBarBaz(
        [Map("bar.baz")] string baz
        Data repository)
    {
        // TODO implement logic
       return null;
    }

2. instead of doing the auto mapping of arguments we process representation manually

    [ReferenceResolver]
    public static Foo? GetFooByBarBaz(
        [LocalState] ObjectValueNode data,
        Data repository)
    {
        // TODO implement logic by manually reading representation from data
       return null;
    }

Related #6

[phil-lee-kb]

Quick question - for the "// TODO implement logic by manually reading representation from data" option - I've had a look at the source code and there appear to be a range of Parsers and Converters that might already do the job of converting from the ObjectValueNode entity representation to the relevant C# entity class. Any guidance on which is the right one? Alternatively I'll just copy/paste some of the existing Parser/Visitor code to handle it.

E.g. In the above, converting from ObjectValueNode to Foo