为什么我无法从 JSON 对象中获取一些键值？

Question

场景：

我正在使用 Node.js 中的 Slack 自定义应用程序，我需要一个用户列表并在 Slack 对话框中将用户的“名称”发送到一个下拉列表。

我在一个长 JSON 对象中获得了一个用户列表，该对象非常好，该对象具有数组类型的键名“成员”，然后使用 foreach 迭代“成员”数组并提取用户名。

问题：

在 "members" 数组中，每个用户都有一个对象，每个用户都有他们的 "id"、"name"、"team_id"、""real_name" 等等 当我提取“名称”并发送它作为响应时，它工作正常并在对话框中填充列表但是当我发送“real_name”时它停止工作并且在对话框中，我看不到任何条目。

请看下面的代码：

        slack.users.list({
                token: userToken
            })
            .then((response) => {
                console.log("users", response.members);
                if(response.members.length !== 0){
                    console.log("Inside users if");
                    response.members.forEach((userObject) => {
                        //at this line I am getting userObject.real_name correct
                        var userName = {
                            "label" : userObject.real_name,
                            "value" : userObject.real_name
                        }
                        // at this line I checked, "userName" is creating fine
                        assignToList.push(userName);
                        //at this line I checked, "assignToList" is creating fine
                    });
                    res.send({options: assignToList});
                }

            })
            .catch(error => console.error("Error while getting users list", error));

用户列表的JSON：

users { ok: true, members: [ { id: 'USLACKBOT', team_id: 'T894JCLMV', name: 'slackbot', deleted: false, color: '757575', real_name: 'Slackbot', tz: null, tz_label: 'Pacific Daylight Time', tz_offset: -25200, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 0 }, { id: 'U87GKAELR', team_id: 'T894JCLMV', name: 'hamza.tariq.it', deleted: false, color: '9f69e7', real_name: 'Hamza', tz: 'Australia/Canberra', tz_label: 'Australian Eastern Standard Time', tz_offset: 36000, profile: [Object], is_admin: true, is_owner: true, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 1569099496, has_2fa: false }, { id: 'U8855S4CS', team_id: 'T894JCLMV', name: 'ybot', deleted: false, color: 'e7392d', real_name: 'Hybris Commerce Bot', tz: 'America/Los_Angeles', tz_label: 'Pacific Daylight Time', tz_offset: -25200, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: true, is_app_user: false, updated: 1530835779 }, { id: 'U8976PQCF', team_id: 'T894JCLMV', name: 'hybrisbot', deleted: false, color: '4bbe2e', real_name: 'yIntegration', tz: 'America/Los_Angeles', tz_label: 'Pacific Daylight Time', tz_offset: -25200, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: true, is_app_user: false, updated: 1569099496 }, { id: 'UCQ1WRY4S', team_id: 'T894JCLMV', name: 'mahwishhamza97', deleted: false, color: '3c989f', real_name: 'Brian Lara', tz: 'Australia/Canberra', tz_label: 'Australian Eastern Standard Time', tz_offset: 36000, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 1569099496, has_2fa: false }, { id: 'UCR58NWMD', team_id: 'T894JCLMV', name: 'prioritybot', deleted: false, color: '674b1b', real_name: 'prioritybot', tz: 'America/Los_Angeles', tz_label: 'Pacific Daylight Time', tz_offset: -25200, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: true, is_app_user: false, updated: 1548659099 }, { id: 'UCR5YEXUZ', team_id: 'T894JCLMV', name: 'siddarth.pugazhendi', deleted: false, color: 'e0a729', real_name: 'Siddarth Pugazhendi', tz: 'Australia/Canberra', tz_label: 'Australian Eastern Standard Time', tz_offset: 36000, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 1569099496, has_2fa: false }, { id: 'UCRGZU0SG', team_id: 'T894JCLMV', name: 'pasquale.campitiello', deleted: false, color: '2b6836', real_name: 'Pasquale', tz: 'Australia/Canberra', tz_label: 'Australian Eastern Standard Time', tz_offset: 36000, profile: [Object], is_admin: false, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 1569099496, has_2fa: false }, { id: 'UCRNZKTSN', team_id: 'T894JCLMV', name: 'usman.kamal', deleted: false, color: '5b89d5', real_name: 'Usman Kamal', tz: 'Asia/Karachi', tz_label: 'Pakistan Standard Time', tz_offset: 18000, profile: [Object], is_admin: true, is_owner: false, is_primary_owner: false, is_restricted: false, is_ultra_restricted: false, is_bot: false, is_app_user: false, updated: 1569099496, has_2fa: false }, { id: 'UCRTWG79B', team_id: 'T894JCLMV', name: 'felipe.rodrigues', deleted: false, color: '99a949', real_name: 'Felipe', tz: 'Australia/Canberra', tz_label: 'Australian Eastern Stan

Answer 1

解决了。

问题：

在“members”数组中，“real_name”字段的一些 undefined 值也造成了此问题。

解决方案：

刚刚添加了if 检查以验证“real_name”是否有效。它就像一个魅力。

if(response.members.length !== 0){
            response.members.forEach((userObject) => {
                if(userObject.real_name){ //added this check
                var userName = {
                    "label" : userObject.real_name,
                    "value" : userObject.id
                }
                assignToList.push(userName);
                }
            });
            res.send({options: assignToList});
        }

Answer 2

将您的回复更改为：

response.members.members.forEach

发件人：response.members.forEach

不过，我建议您仔细查看 API 文档..