protected $inputObject = true; for interface

[liepaja]

Is it possible to use interface as input type?

[n1ru4l]

This is not part of the official spec. There are considerations allowing unions instead of interfaces as an input type. graphql/graphql-spec#114 (comment)

For now you could simply use a json field or stringify your json. (Not that clean, but I am also doing this).

Maybe someone could write a port of the following javascript package for php? https://github.com/Cardinal90/graphql-union-input-type