[GraphQL] Use GraphQLList with GraphQLObject Types

const queryType = new GraphQLObjectType({
    name: ‘QueryType‘,
    description: ‘The root query type‘,
    fields :{
        videos: {
            type: new GraphQLList(videoType),
            resolve: getVideos
        },
        video: {
            type: videoType,
            args: {
                id: {
                    type : new GraphQLNonNull(GraphQLID),
                    description: ‘The id of the video‘
                }
            },
            resolve: (_, args) => getVideoById(args.id)
        }
    }
});

const videoA = {
    id: ‘a‘,
    title: ‘Create a GraphQL Schema‘,
    duration: 120,
    watched: true,
};
const videoB = {
    id: ‘b‘,
    title: ‘Ember.js CLI‘,
    duration: 240,
    watched: false,
};
const videos = [videoA, videoB];
const getVideoById = (id) => new Promise((resolve) => {
    const [video] = videos.filter((video) => {
        return video.id === id;
    });

    resolve(video);
});

const getVideos = () => new Promise((resolve) => resolve(videos));

exports.getVideoById = getVideoById;
exports.getVideos = getVideos;