Question

我正在从API中提取数据，该API会返回这样的数据

[
   {
      "id":466,
      "createdDate":"2019-04-18 13:22:34",
      "updatedDate":null,
      "isAdmin":false,
      "createGroupRequestsCount":0,
      "createdGroupsCount":0,
      "postsCount":0,
      "community":{
         "id":7,
         "createdDate":"2019-04-18 13:14:34",
         "avatar":"",
         "name":"FAX International School Community",
         "description":"",
         "referenceId":6,
         "referenceName":"Fax International School",
         "referenceAlias":"FIS",
         "createGroupRequestsCount":0,
         "groupsCount":0,
         "postsCount":0
      },
      "member":{
         "id":501,
         "firstname":"Jack",
         "lastname":"Manson",
         "othernames":null,
         "createdDate":"2019-04-18 13:21:49",
         "updatedDate":null,
         "isEmployee":false,
         "email":"ernest.agyekum@minex360.com",
         "avatar":null,
         "primaryContact":"+233244908666",
         "referenceId":1112,
         "postsCount":0
      }
   }
]

我使用以下脚本提取数据，该脚本也返回带有子对象的数据

componentDidMount = async () => {
const communities = await API.getUserCommunityInfo(userId,schoolId);
const groups = await API.getGroups(communityMemberId);
console.log(communities)

}

当我尝试使用member访问子对象console.log(communities.member[0].id)时，我收到一条错误消息cannot read property of 0 undefined

有关如何检索子对象的任何帮助吗？

Answer 1

您收到错误消息，因为member不是communities的直接子代

communities是Array中的Objects，因此，要访问第一个成员，您需要执行communities[0].member.id。

获得对本机对象的访问权

1 个答案: