Mongoose 如何为„；更新”；连接到mLab的GraphQL中的数据

我正在学习GraphQL突变。我把我的数据保存在mLab上。我使用GraphiQL进行查询输出。我不知道如何为“更新”数据编写变异。目前，我有适当的“创建”和“删除”突变：

schema.js

addMovie: {
type: MovieType,
args: {
    title: {type: new GraphQLNonNull(GraphQLString)},
    genre: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    let new_movie = new Movie({
        title: args.title,
        genre: args.genre
    });
    return new_movie.save();
}

deleteMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    return Movie.findOneAndDelete(args.id);
}

editMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)},
    title: {type: GraphQLString},
    genre: {type: GraphQLString}
},
resolve(parent, args) {
    return Movie.findOneAndUpdate(args.id);
}

}

GraphiQL

mutation {
addMovie(title: "Goodfellas", genre: "Drama"){
    title
    genre
}

mutation {
deleteMovie(id: "5c0djut25d81cbq17356628y"){
    id
}

mutation {
editMovie(id: "5c0djut25d81cbq17356628y", title: "Goodfellas", genre: "Crime"){
    id
}

}

schema.js

addMovie: {
type: MovieType,
args: {
    title: {type: new GraphQLNonNull(GraphQLString)},
    genre: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    let new_movie = new Movie({
        title: args.title,
        genre: args.genre
    });
    return new_movie.save();
}

deleteMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    return Movie.findOneAndDelete(args.id);
}

editMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)},
    title: {type: GraphQLString},
    genre: {type: GraphQLString}
},
resolve(parent, args) {
    return Movie.findOneAndUpdate(args.id);
}

}

GraphiQL

mutation {
addMovie(title: "Goodfellas", genre: "Drama"){
    title
    genre
}

mutation {
deleteMovie(id: "5c0djut25d81cbq17356628y"){
    id
}

mutation {
editMovie(id: "5c0djut25d81cbq17356628y", title: "Goodfellas", genre: "Crime"){
    id
}

}

我正在努力写“更新”变异，目前为止我做的最好的事情是：

schema.js

addMovie: {
type: MovieType,
args: {
    title: {type: new GraphQLNonNull(GraphQLString)},
    genre: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    let new_movie = new Movie({
        title: args.title,
        genre: args.genre
    });
    return new_movie.save();
}

deleteMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)}
},
resolve(parent, args) {
    return Movie.findOneAndDelete(args.id);
}

editMovie: {
type: MovieType,
args: {
    id: {type: new GraphQLNonNull(GraphQLString)},
    title: {type: GraphQLString},
    genre: {type: GraphQLString}
},
resolve(parent, args) {
    return Movie.findOneAndUpdate(args.id);
}

}

GraphiQL

mutation {
addMovie(title: "Goodfellas", genre: "Drama"){
    title
    genre
}

mutation {
deleteMovie(id: "5c0djut25d81cbq17356628y"){
    id
}

mutation {
editMovie(id: "5c0djut25d81cbq17356628y", title: "Goodfellas", genre: "Crime"){
    id
}

}

上面的变异不会产生任何错误，但仍然会返回

genre: "Drama"

而不是

genre: "Crime"

好的，我有这个：

突变：

updateMovie: {
    type: MovieType,
    args: {
        id: {type: new GraphQLNonNull(GraphQLID)},
        title: {type: new GraphQLNonNull(GraphQLString)},
        genre: {type: new GraphQLNonNull(GraphQLString)}
    },
    resolve(parent, args) {
        return Movie.findByIdAndUpdate(args.id, {$set: {title: args.title, genre: args.genre}}).exec();
    }
}

mutation {
    updateMovie(id: "3b0fhybd5d12fec157923290", title: "Kill Bill", genre: "crime")
    {
        id
        title
        genre
    }
}

查询：

updateMovie: {
    type: MovieType,
    args: {
        id: {type: new GraphQLNonNull(GraphQLID)},
        title: {type: new GraphQLNonNull(GraphQLString)},
        genre: {type: new GraphQLNonNull(GraphQLString)}
    },
    resolve(parent, args) {
        return Movie.findByIdAndUpdate(args.id, {$set: {title: args.title, genre: args.genre}}).exec();
    }
}

mutation {
    updateMovie(id: "3b0fhybd5d12fec157923290", title: "Kill Bill", genre: "crime")
    {
        id
        title
        genre
    }
}