javascript Exemplo订阅graphql

Posted 2021-05-03

    comment: {
        subscribe(parent, { postId }, { db, pubsub }, info){
            const post = db.posts.find((post) => post.id === postId && post.published)

            if (!post) {
                throw new Error('Post not found')
            }

            return pubsub.asyncIterator(`comment ${postId}`)
        }
    }
}