graphql - 在 GraphQL/Apollo 中使用带有突变查询的 promise ？

Question

我在 http://localhost:3010/graphiql 中运行以下突变查询:

突变

mutation($fromID: String!, $toID: String!, $msgText: String!){
  createIM(fromID: $fromID, toID: $toID, msgText: $msgText){
    fromID
    toID
    msgText
  }
}

查询变量

{
  "fromID": "1",
  "toID": "2",
  "msgText": "Test from GraphIQL"
}

我的解析器中有这个突变代码:

Mutation: {
    createIM(root, args, context) {
        return Promise.resolve()
            .then(() => {
                console.log('checkpoint #1');
                const temp = connectors.IM.create(args);
                return temp;
            })
            .then((x) => {
                //console.log(x);

                return x;
            })
            .then((args) =>{
                console.log(args);
                console.log('checkpoint #2');
                const temp = connectors.IM.findAll({ where: args }).then((res) => res.map((item) => item.dataValues))
                    return temp;
                }
            )
            .then(comment => {
                // publish subscription notification
                console.log('checkpoint #3');
                console.log(comment);
                pubsub.publish('IMAdded', comment);
                return comment;
            })
            .catch((err)=>{console.log(err);});
    },
},

它成功地在我的 postgres 数据库中创建了一条新记录。最后的 then block (检查点 #3)中的 console.log(comment) 记录以下内容:

 [ { id: 1,
     fromID: '1',
     toID: '2',
     msgText: 'testing 123 from graphiql',
     createdAt: Thu Sep 15 2016 12:42:18 GMT-0700 (PDT),
     updatedAt: Thu Sep 15 2016 12:42:18 GMT-0700 (PDT) },
   { id: 2,
     fromID: '1',
     toID: '2',
     msgText: 'test from graphiql',
     createdAt: Sat Sep 17 2016 22:50:43 GMT-0700 (PDT),
     updatedAt: Sat Sep 17 2016 22:50:43 GMT-0700 (PDT) },
   { id: 3,
     fromID: 'DsmkoaYPeAumREsqC',
     toID: '572bddac4ecbbac0ffe37fd4',
     msgText: 'testing 123 from ui',
     createdAt: Sun Sep 18 2016 10:57:12 GMT-0700 (PDT),
     updatedAt: Sun Sep 18 2016 10:57:12 GMT-0700 (PDT) },
[.....]
   { id: 32,
     fromID: '1',
     toID: '2',
     msgText: 'Test from GraphIQL',
     createdAt: Wed Oct 12 2016 16:34:41 GMT-0700 (PDT),
     updatedAt: Wed Oct 12 2016 16:34:41 GMT-0700 (PDT) } ]

但是 GraphIQL 给出了以下响应:

{
  "data": {
    "createIM": {
      "fromID": null,
      "toID": null,
      "msgText": null
    }
  }
}

我是否需要在我的最终 .then block 中做一些不同的事情？

Answer 1

应 Patrick Scott 的要求，这里是工作代码，感谢@stubailo 的帮助:

Mutation: {
    createIM(root, args, context) {
        return Promise.resolve()
            .then(() => {
                console.log('cp #1');
                const temp = connectors.IM.create(args);
                return temp;
            })
            .then(comment => {
                // publish subscription notification
                console.log('cp #2');
                console.log(comment);
                pubsub.publish('IMAdded', comment);
                return comment;
            })
            .catch((err)=>{
                console.log(err);
            });
    },
},