Support for initializing classes/records via constructor

I’m building my own sorting argument:

#nullable enable

class SortArgument
{
    // CS8618 warning: Non-nullable property 'Path' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.
    public string Path { get; set; }
    // CS8618 warning: Non-nullable property 'Direction' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.
    public string Direction { get; set; }
}
...

schema.AddType<SortArgument>("sortArgument", null).AddAllFields();

schema.UpdateQuery(queryType =>
{
    queryType.ReplaceField(
        "users",
        new
        {
            sort = (SortArgument[]?)null
        },
        (db, args) => ...,
        "..."
    );
});

It’d be cool if EntityGraphQL supported initializing SortArgument by calling its constructor, so that I could easily do additional validation and ensure that Path and Direction are non-null:

class SortArgument
{
    public string Path { get; }
    public string Direction { get; }
   
   public SortArgument(string path = null, string direction = null)
   {
      Path = path ?? throw new ArgumentNullException(nameof(path));

      if(direction == null || direction.Length < 10)
         throw new ArgumentException("Direction must be at least 10 letters long", nameof(direction));

      Direction = direction;
   }
}

Just a suggestion 🙂 Thanks for the great library! ^_^

[lukemurray]

In an example like that it makes sense. The GraphQL spec does not support that. So other tools etc may complain.

The spec states in simple terms

• each type needs a unique name
• Types used as arguments are Input Types
• Input types are different as they have more restrictions - no fields with arguments etc.

[lukemurray]

Small thing in your example.

schema.AddType<SortArgument>("sortArgument", null).AddAllFields();

You are using SortArgument as an input type. You will need to use

schema.AddInputType<SortArgument>("sortArgument", null).AddAllFields();