[LRUG] Double submit

[Riccardo Tacconi]

Hi,

You could put a hash in  a hidden field, when Rails receives the first
submission you save it in the session with a timestamp. Every time you
receive new submission you check if the has has been already used in the
last few seconds, if it was already used you trigger a validation error.
You will have to clean stale submission from the session. Otherwise you
could put the has in the DB.

On 24 April 2015 at 09:43, Andrew Stewart <boss at airbladesoftware.com> wrote:

> Hello LRUG!
>
> Some people using my Rails app are speedy double-clickers of form submit
> buttons.  While I admire their alacrity I would like Rails to ignore the
> duplicate submissions.
>
> Disabling the submit button client-side heads off the
> quick-but-not-lightning double-clickers.  However a special few still
> outpace the browser so I am after a server-side solution.
>
> I imagine each form submission would have a unique token and the server
> would ignore or raise an error for submissions with duplicate tokens within
> a rolling window of, say, a few seconds.  Perhaps this would be handled in
> a Rack middleware.
>
> Does such a thing already exist?  I know this is an old problem but I
> can't seem to find any decent solutions.
>
> Thanks in advance!
>
> Yours,
>
> Andy Stewart
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-- 
Riccardo Tacconi

http://github.com/rtacconi
http://twitter.com/rtacconi
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