CODEWITHSUNDEEP
jsonnode.jsrequestcheerio
bretcj7
bretcj7

Reputation: 355

Cheerio error with each loop on class selector - TypeError: Cannot set property 'range' of undefined

I have a simple Cheerio parse i'm doing on a request app. Not sure why this undefined error is coming up when trying to set the array but i'm guessing the value isn't there for it to set.

        var $ = cheerio.load(body);

        var json = [  
            { "range": "", "address": "", "state": "", "zip": "", "info": "" }
        ];

        $('.findCourse').each(function (i, elem) {
            // Range Name
            console.log("iteration - ", i);
            console.log("name - ", $(this).text().trim());
            json[i].range = $(this).text().trim();
        });

Here is my console response with it reading and setting the first two items it finds in the scraped html.

iteration -  0
name -  Pollock's Ferry Hunting Club Inc.
iteration -  1
name -  Eagle 1

TypeError: Cannot set property 'range' of undefined

at Object.<anonymous> (/usr/local/node_app/server.js:30:31)
  at exports.each (/usr/local/node_app/node_modules/cheerio/lib/api/traversing.js:267:24)
at Request.request.post.form.__EVENTTARGET [as _callback] (/usr/local/node_app/server.js:26:30)
at Request.self.callback (/usr/local/node_app/node_modules/request/request.js:121:22)
at Request.EventEmitter.emit (events.js:98:17)
at Request.<anonymous> (/usr/local/node_app/node_modules/request/request.js:978:14)
at Request.EventEmitter.emit (events.js:117:20)
at IncomingMessage.<anonymous> (/usr/local/node_app/node_modules/request/request.js:929:12)
at IncomingMessage.EventEmitter.emit (events.js:117:20)
at _stream_readable.js:920:16 1 May 23:02:57 - [nodemon] app crashed - waiting for file changes before starting...

Upvotes: 1

Views: 23480

Answers (1)

bretcj7
bretcj7

Reputation: 355

Found the issue. The debugging statements were being executed before the reference error was thrown.

Simple javascript array issue where I was trying push the new element into the array at a position that didn't exist.

Here is my fix.

    var $ = cheerio.load(body);
    var json = [];

    $('.findCourse').each(function (i, elem) {
        // Range Name
        json.push({});
        json[i].range = $(this).text().trim();
    });

Upvotes: 8

Related Questions