Get raw stacktrace

[grimurd]

I'm creating a rest api and when in development mode i also return all errors via json as well as logging it to the console. However the prettified stack trace is unreadable when it is returned as a string. Is there a way for me to get the raw stack trace before it was modified?

Example:

"message": "Cannot read property 'dataValues' of null",
"error": " �[0m�[97m�[41mError�[0m�[90m:�[0m�[37m �[0m�[97mCannot read property 'dataValues' of null�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m�[97m�[41mTypeError�[0m�[90m:�[0m�[37m �[0m�[97mCannot read property 'dataVa�[0m\ �[0m �[0m �[0m�[37mlues' of null�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mloginservice.js�[0m�[90m:�[0m�[93m188�[0m�[37m �[0�[0m\ �[0m �[0m �[0m�[37mm�[37mauthenticateUser�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m/home/grimur/Documents/Repos/AuthenticationServer/src/servi�[0m\ �[0m �[0m �[0m�[37mces/loginservice.js:1�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m88:23�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mq.js�[0m�[90m:�[0m�[93m794�[0m�[37m �[0m�[37m_fulf�[0m\ �[0m �[0m �[0m�[37milled�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m[AuthenticationServer]/[q]/q.js:794:54�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mq.js�[0m�[90m:�[0m�[93m823�[0m�[37m �[0m�[37mself.�[0m\ �[0m �[0m �[0m�[37mpromiseDispatch.done�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m[AuthenticationServer]/[q]/q.js:823:30�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mq.js�[0m�[90m:�[0m�[93m756�[0m�[37m �[0m�[37mPromi�[0m\ �[0m �[0m �[0m�[37mse.promise.promiseDispatch�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m[AuthenticationServer]/[q]/q.js:756:13�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mq.js�[0m�[90m:�[0m�[93m564�[0m�[37m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m[AuthenticationServer]/[q]/q.js:564:44�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[90m-�[0m �[0m�[93mq.js�[0m�[90m:�[0m�[93m110�[0m�[37m �[0m�[37mflush�[0m\ �[0m �[0m �[0m�[37m�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m �[0m�[90m[AuthenticationServer]/[q]/q.js:110:17�[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m �[0m�[0m\ �[0m �[0m\ �[0m �[0m�[90m-�[0m �[0m�[37m�[0m�[0m\ �[0m �[0m\ �[0m"

[AriaMinaei]

How do you setup PE? Is it like require("pretty-error").start();? Or is it like pe.render(someError);?

[grimurd]

require("pretty-error").start(); is how i start it. Should i do it the other way instead?

[AriaMinaei]

Well we could (and probably should) provide an api for that. But right now, if you wanna intercept an error before PE modifies it, you could do something like this:

PrettyError = require '../lib/pretty-error'
pe = new PrettyError()

prepare = Error.prepareStackTrace or (exc, frames) ->
    result = exc.toString()
    frames = frames.map (frame) -> "  at #{frame.toString()}"
    result + "\n" + frames.join "\n"

# We replace the original Error.prepareStackTrace with a custom one
Error.prepareStackTrace = (exc, trace) =>
    # Apply the modifications that were originally intended to be
    # applied on the stack trace
    stack = prepare.apply(null, arguments)
    # now we have access to the original stack trace
    console.log stack
    # and we can render the trace too
    pe.render {stack, message: exc.toString().replace /^.*: /, ''}, no

# Just a sample error to test things
a = b

I could rewrite this in JS if you prefer though.

[AriaMinaei]

Closing this issue since it's been inactive for some time.