Append query string to url

Question

I have a callback url string params[:callback] and I need to append a query string "&result=true" and redirect the user. The better way I found of doing this is using addressable but I think the code is too big for task like this especially when we are talking about ruby:

callback = Addressable::URI.parse(params[:callback])
query = callback.query_values
query[:result] = 'true'
callback.query_values = query

redirect_to callback.to_s

Is there a more elegant way of getting the same result as this snippet?

Answer 1

I wan't to bring update to this topic, because any of the solutions didn't work me.

The reason being, that it seems that callback.query_values returns Nil if the actual url doesn't have existing query values.

Therefore if you have urls such as: http://www.foo.com and http://www.foo.com?bar=1 you should use the following code:

url = "http://www.foo.com" # or params[:callback] obviously. :)

callback = Addressable::URI.parse(url)
callback.query_values = (callback.query_values || {}).merge({
  result: true
})

redirect_to callback.to_s

Cheers.

Answer 2

• if you don't need any URL validations you can do this (looks a little bit dirty):

  
  url = params[:callback]
  redirect_to url + (url.include?('?') ? '&' : '?') + 'result=true'
  

• otherwise you have to use either some external library (like Addressable) or URI module from standard library