res.json is not a function - nodejs

Question

I've got this error using res.json to get the return of my function and this is code is been used em anothers places as wrote below, running fine.

async function getPlaylist(req, res, playlistId) {

  try {

    // const calltoken = await getToken()

    // const token = calltoken.data.access_token

    // console.log(token)

    const config = {
      headers: {
        'Authorization': 'Bearer ' + 'BQA0K9bKgBVn8xTp-yTsoaKs5VfS7EyjMIL03OEOy05wq08ZmLkNfqbbnsL_hFT1AV2FGN5tAQdeDV1X224', //token,
        'Content-Type': 'application/json',
        'Accept': 'application/json'
      }
    }

    const url = 'https://api.spotify.com/v1/playlists/1j2L3DjzZ3SdN64r83Sblj?si=cuvOrPONSO6caE9XD6smEg'

    await axios.get(url, config)
      .then(function (response) {

        var playlist = response

        var items = playlist.data.tracks.items

        // console.log(items)

        const playlistfull = []

        items.forEach(index => {

          var playlistdata = {
            name: index.track.name,
            artists: index.track.album.artists[0].name,
            album: index.track.album.name,
            url: index.track.external_urls.spotify
          }

          playlistfull.push(playlistdata)

        })

        return res.json(playlistfull)

      })

  } catch (error) {

    return console.log(error)

  }
}

Why should res.json be a function? What is res? It's the second argument to getPlaylist but you haven't show us how that function is called so we can't know what the value actually is. Since it doesn't have a json method but you think it should be, that value probably isn't what you think it is. — Quentin
– Quentin, Commented Dec 23, 2019 at 2:22
Does this answer your question? TypeError: res.json is not a function — Hasan
– Hasan, Commented Dec 23, 2019 at 2:55

seunggabi · Accepted Answer · 2019-12-23 06:39:39Z

1

You have to use in NodeJS
Node's res give parameter to function

const router = express.Router();
router
    .route('/')
    .get((req, res) => {
        const playlistId = 'asdf';
        getPlaylist(req, res, playlistId);
        return;
    });

answered Dec 23, 2019 at 6:39

seunggabi

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