TypeError: Cannot read property 'data' of undefined

[sarmadali20]

UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'data' of undefined
at RediQLCache.query (/rediqless/src/RediQL.js:82:29)

[IMingGarson]

In this module, it requires you to add graphql query to POST body.
I used node-fetch module and this is my setup:

app.get('/', async (req, res) => {
  const query = {
          // see here I explicitly declare a data field
          data: {
              "query": "{\n HarryPotter\n {\n title\n author\n ISBN\n }\n }",
              "variables": null
          }
  };
  const response = await fetch(`http://localhost:4000/rediql`, {
          method: 'post',
          body: JSON.stringify(query),
          headers: {'Content-Type': 'application/json'}
  });
  const data = await response.json();
  res.send(data);
});

You can also try to send such query to normal endpoint /graphql, but you need to modify the query a little bit.

app.get('/', async (req, res) => {
  const query = {
          // see here I omit the data field
          "query": "{\n HarryPotter\n {\n title\n author\n ISBN\n }\n }",
          "variables": null
  };
  const response = await fetch(`http://localhost:4000/graphql`, {
          method: 'post',
          body: JSON.stringify(query),
          headers: {'Content-Type': 'application/json'}
  });
  const data = await response.json();
  res.send(data);
});