Access array within Javascript object

Question

I have an http request that calls an api and returns something that looks like this in the body. I need to access the "members" array. body.results is undefined. What am I doing wrong?

The call to get this data looks like this:

http.get(options, function(error, response, body)

Results below:

{ results: [ { members: [Array] } ],
  performanceStats:
   { inspectedCount: 2213,
     omittedCount: 0,
     matchCount: 828,
     wallClockTime: 101 },
  metadata:
   { eventTypes: [ 'SomeType' ],
     eventType: 'SomeType',
     openEnded: true,
     beginTime: '2020-01-06T10:36:48Z',
     endTime: '2020-01-07T10:36:48Z',
     beginTimeMillis: 1578307008262,
     endTimeMillis: 1578393408262,
     rawSince: '1 DAYS AGO',
     rawUntil: 'NOW',
     rawCompareWith: '',
     guid: '728c90b2-9637-cd72-26b3-8e05a6fa6fba',
     routerGuid: '969d2d3a-e77c-db66-9a4a-c0141a516404',
     messages: [],
     contents: [ [Object] ] } }

Could you please add a code that calls the endpoint so that we could see what body is? — Marcin
– Marcin, Commented Jan 7, 2020 at 10:50
Can you show the process of ending up with this var/const of body, otherwise it's really difficult to tell what you're doing wrong? If you include that code in your question it would be helpful. — decho
– decho, Commented Jan 7, 2020 at 10:51
The result is probably not parsed as JSON, so body may just be a string that contains the JSON. Maybe try const bodyParsed = JSON.parse(body); and then check if bodyParsed.results is the array — neelsg
– neelsg, Commented Jan 7, 2020 at 10:54
results is an array so members is at 0th index. try body.results[0] — Mridul
– Mridul, Commented Jan 7, 2020 at 10:55
If you share the piece of code then it will help us in resolving it better. One thing you can try is using async await or callback since network requests are asynchronous. If you are not waiting for the response to come then you will get undefined. — kapil pandey
– kapil pandey, Commented Jan 7, 2020 at 10:57

Mridul · Accepted Answer · 2020-01-07 11:03:49Z

1

JSON Response

{ results: [ { members: [Array] } ],
 performanceStats:
 { inspectedCount: 2213,
 omittedCount: 0,
 matchCount: 828,
 wallClockTime: 101 },
 metadata:
 { eventTypes: [ 'SomeType' ],
 eventType: 'SomeType',
 openEnded: true,
 beginTime: '2020-01-06T10:36:48Z',
 endTime: '2020-01-07T10:36:48Z',
 beginTimeMillis: 1578307008262,
 endTimeMillis: 1578393408262,
 rawSince: '1 DAYS AGO',
 rawUntil: 'NOW',
 rawCompareWith: '',
 guid: '728c90b2-9637-cd72-26b3-8e05a6fa6fba',
 routerGuid: '969d2d3a-e77c-db66-9a4a-c0141a516404',
 messages: [],
 contents: [ [Object] ] } }

To access members

body.results[0]

answered Jan 7, 2020 at 11:03

Mridul

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sayalok · Accepted Answer · 2020-01-07 11:14:35Z

let c = { results: [ { members: [2,3] } ],
  performanceStats:
   { inspectedCount: 2213,
     omittedCount: 0,
     matchCount: 828,
     wallClockTime: 101 },
  metadata:
   { eventTypes: [ 'SomeType' ],
     eventType: 'SomeType',
     openEnded: true,
     beginTime: '2020-01-06T10:36:48Z',
     endTime: '2020-01-07T10:36:48Z',
     beginTimeMillis: 1578307008262,
     endTimeMillis: 1578393408262,
     rawSince: '1 DAYS AGO',
     rawUntil: 'NOW',
     rawCompareWith: '',
     guid: '728c90b2-9637-cd72-26b3-8e05a6fa6fba',
     routerGuid: '969d2d3a-e77c-db66-9a4a-c0141a516404',
     messages: [],
     contents: [ [Object] ] } }

console.log(c.results[0].members)

I keep ur response to variable c Then first i call the c then call the results after that there is one object only so i use [0] then call the members

Hope it helps

Shubham Nagota · Accepted Answer · 2020-01-07 10:50:51Z

0

You need to access the response body as response.data.results

answered Jan 7, 2020 at 10:50

Shubham Nagota

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