export const SingerType = new GraphQLObjectType({
    name: "Singer",
    description: "A band´s singer",
    fields: () => ({
        id: {
            type: new GraphQLNonNull(GraphQLID),
        },
        name: {
            type: new GraphQLNonNull(GraphQLString)
        },
        band: {
            type: new GraphQLNonNull(BandType),
            resolve: (source, args, context) => {
                return Band.findOne({
                    _id: source.band_id
                }).exec();
            }
        }
        albuns: {
            type: new GraphQLList(AlbumType),
            resolve: (source, args, context) => {
                return Album.find({
                    _id: source._id
                }).exec();
            }
        }
    })
});

export const SingerInputType = new GraphQLInputObjectType({
    name: "SingerInput",
    description: "Band´s singer input type",
    fields: () => ({
        name: {
            type: new GraphQLNonNull(GraphQLString)
        },
        band_id: {
            type: new GraphQLNonNull(GraphQLString) <<== GraphQLString or GraphQLID here ???
        },
        albuns: {
            type: new GraphQLList(GraphQLString) <<== GraphQLString or GraphQLID here ???
        }       }
    })
});