Node.js res.render（）与请求不起作用

Question

I am trying to render an EJS template and pass in data to it with the node package Request. I have got this to work with no problem using node-fetch on my last project.

Here's a quick snippet of that:

const fetchCurrentWeather = (url, res) => {
   fetch(url)
      .then(res => res.json())
      .then(data => res.render('pages/weather', {
        currentId: data.list
      }))
      .catch(err => {
         console.log(err);
         res.sendStatus(500);
      });
}

And this will render the EJS weather page template with the data from the API response.

With this latest project however, I am trying to use the Node Package Request to do the same thing and I am failing. Here's the code for that:

app.post('/', (req, res, next) => {
    const paramOptions = {
          url: 'https://api.foursquare.com/v2/venues/search',
          method: 'GET',
          qs: {
            client_id: 'W033PDIYFI2TSAUO4L5ANUFOAUMZV32NUWNOF0NL0JS2E5W4',
            client_secret: 'SM1ZI11XOMPVMEGMBZXSN3LGTLOBQCVGIM1SN4QAO0QTCSM1',
            near: 'xxxxxx',
            intent: 'browse',
            radius: '15000',
            query: 'pizza',
            v: '20170801',
            limit: 1
          }
    };

    request(paramOptions, function(err, res, body) {
         if(err) {
           console.log(err)
         } else {
           res.render('pages/search'); //THIS WILL NOT WORK
           console.log(body) // RETURNS DATA FROM API ENDPOINT

        }
    });
    res.render('pages/search'); // THIS WILL WORK
});

The res.render() that does work is outside of the scope of the Request function, so I can not access the returned data from this Request function. When I console.log the body of the Request function, I do get JSON data returned in my terminal view, so I know Request is working, but I am unsure of how to pass this data into an EJS template as I did with my fetch() example.

Answer 1

There are two separate res parameters and the inner one is hiding the outer one. Change the name of the one in this line:

request(paramOptions, function(err, res, body) {

to something else like this:

request(paramOptions, function(err, response, body) {

And, then when you call res.render() , it will use the higher scoped one you want.

You probably also need to pass some data to res.render(filename, data) as the second argument so you can feed the results of the request() to your render operation.

And, in your if (err) condition, you should send an error status, perhaps res.sendStatus(500) .