Redirecting POST-data after validation errors in Node.js

Question

Is there any way to shift data from a request in a POST function to a resource of a GET function?

app.get '/form', routes.getForm
app.post '/form', routes.postForm
app.get '/form', routes.getForm  # pass return data from previous POST call

I need to validate some form data and would like to preset data that has been entered before the POST.

alessioalex · Accepted Answer · 2011-12-01 15:17:51Z

4

You shouldn't do it that way, instead you should be using a middleware function, for example:

validate = (req, res, next) ->
  # validate your req.body stuff here
  ...
  if data_is_valid
    next() # proceed to the next function
  else
    res.redirect '/form?data=invalid'

app.post '/form', validate, routes.getForm

answered Dec 1, 2011 at 15:17

alessioalex

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2 Comments

p1nox Over a year ago

But how can you persist the form data that user entered previous the error valdiation and show it to the user when rendering the error? When res.redirect is executed attributes.body get resets.

alessioalex Over a year ago

You can store it on the session and then delete it each time after the form page is rendered. This is how github.com/jaredhanson/connect-flash works.

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