Graphql-ruby: [Question]: When assigning attributes, you must pass a hash as an argument.

[Ancinek]

I am trying to setup mutations in my Rails app, so I followed the guides and I have in my graphql/mutations folder:

Mutations::MutationType = GraphQL::ObjectType.define do
    name "Mutation"
    field :addPlace, Types::PlaceType do
        description "Adds new place!"
        argument :place, PlaceInputType

        resolve -> (t, args, c) {
            Place.create(args[:place])
        }
    end
end

PlaceInputType = GraphQL::InputObjectType.define do
  name "PlaceInputType"
  description "Properties for creating a Place"

  argument :title, !types.String do
    description "Title of the Place."
  end

  argument :description, !types.String do
    description "Description of the Place."
  end
end

And I try to run mutation in graphiql like this:

mutation {
  addPlace(place: {title: "Place title", description: "Place description"}) {
    id
    title
  }
}

All I get in the right graphiql console is SyntaxError: Unexpected token < in JSON at position 0, and in my rails console I also get an error saying ArgumentError (When assigning attributes, you must pass a hash as an argument.).

What did I do wrong?

[rmosolgo]

args[:place] returns a GraphQL::Query::Arguments instance. To convert it to a Hash, use .to_h, for example:

Place.create(args[:place].to_h)

Does that fix it for you?

[Ancinek]

@rmosolgo It actually does. Brilliant! It really should be included in the examples click, as it seems like to_h is happening behind the curtains.

Thanks for that!

[rmosolgo]

Oh, you're right, those examples should be improved! Glad it worked for you :)

[MichalBryxi]

Note: The examples are still incorrect and by today you still need to append .to_h. At least that is what worked for me fro brand new app.