express: TypeError: req.next is not a function

The server stops right away throwing this error. The layout of my template also breaks with no CSS. Please note that I’m not using any middleware, nor am I using next in my callback. I have been looking for a solution but found no concrete solution so far.

/workspace/course/ip/node_modules/express/lib/response.js:1007
    if (err) return req.next(err);
                        ^
TypeError: req.next is not a function
    at done (/workspace/course/ip/node_modules/express/lib/response.js:1007:25)
    at tryRender (/workspace/course/ip/node_modules/express/lib/application.js:642:5)
    at Function.render (/workspace/course/ip/node_modules/express/lib/application.js:592:3)
    at ServerResponse.render (/workspace/course/ip/node_modules/express/lib/response.js:1012:7)
    at /workspace/course/ip/routes/index.js:341:13
    at Array.forEach (<anonymous>)
    at QueryReqWrap.callback (/workspace/course/ip/routes/index.js:340:13)
    at QueryReqWrap.onresolve [as oncomplete] (dns.js:198:10)

About this issue

Original URL
State: closed
Created 5 years ago
Comments: 15 (5 by maintainers)

Most upvoted comments

Ah. It is likely you are calling res.render multiple times in the same request. We can fix it so the error won’t be thrown, but ultimately your code is not going to do what you’re trying to do – you can only call res.render once, when you’re ready to render the response.

+11

dougwilson on Nov 2, 2019

@azakero can you share a minimal app which reproduces this error?

liuxiucai on Jan 8, 2020