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Express Error Handling
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6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Sending custom error message from Express JS over to Backbone up vote 1 down vote favorite In express js, I have the following code which sends a response over to Backbone: if (!user) { req.session.messages = [info.message];
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return res.send(400, howCanIsendTheErrorMessageAlso); } How can I send the error message also, together with the error code? How can Backbone receive it? Any ideas? In backbone, I have the following code: loginModel.save({ username : obj.elEmail.val(), password : obj.elPassword.val(), admin : false }, { success: function (e) { console.log('success'); }, error: function (e) { console.log(e); } }); Any ideas? javascript node.js backbone.js express share|improve this question edited Jan 3 '14 at 11:24 George 27.6k73265 asked Jan 3 '14 at 11:04 Dany D 3101624 Checkout response.send API expressjs.com/api.html#res.send –blunderboy Jan 3 '14 at 11:38 add a comment| 2 Answers 2 active oldest votes up vote 1 down vote accepted You send it from express with: res.send(500, { error: "hi, there was an error" }); In Backbone the parameters of your error callback are: model, xhr, options So you need to extract your error message fron the xhr object in the error callback like this: obj.save( { data:"something" }, { success: functi
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Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 express error object million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up What's the right way to create error messages that get returned in an Express request? up vote 5 down http://stackoverflow.com/questions/20902144/sending-custom-error-message-from-express-js-over-to-backbone vote favorite 2 I have a function called a that accepts a callback, which is invoked with an error if there is one. a is invoked in an Express route request. If there is an error, the error should be the response of the request. function a(cb) { cb(new Error('Some error message')) } app.get('/', function (req, res) { a(function (error) { if (error) { res.json(error, 400) } res.send('No error') }) }) I have http://stackoverflow.com/questions/16146461/whats-the-right-way-to-create-error-messages-that-get-returned-in-an-express-re looked into the code for Express, and it appears that res.json will stringify my error. However, the result of this is an empty string: > var e = new Error('Some error message') undefined > JSON.stringify(e) '{}' > e.message 'Some error message' There are ways I could get my route to return the error message here, such as converting the error object toString in my route. However, I would like to know what the best practice is for formatting error messages in Node APIs, and whether that changes things here. Should I format my error messages differently, or should I just handle the Error object in the route, such as: res.json({ error: error.message }, 400) javascript node.js error-handling express share|improve this question asked Apr 22 '13 at 11:50 user1082754 Some details for why the e.message is missing: stackoverflow.com/questions/18391212/… . –Smartkid Jun 1 at 8:20 add a comment| 3 Answers 3 active oldest votes up vote 0 down vote accepted Express routes can use a third argument next that can be used to either skip the current route by just calling next(), or to pass on errors by calling next(err). Try using: app.get('/', function (req, res, next) { a(function (error) { if (error) { next(error); } else { res.send('No error') } }); }); For more information, c
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