Calling a commandline function using the onclick button

Hello everyone,

I'll start by describing what I'm doing and saying that I am a newbie.
In my ROR (2.1.2) application, would like to send read data from a text
field using the onclick tag to a python script I wrote.
The problem I encounter is with the onclick tag. I used the system()
function to call the python script, but it doesn't function. The python
script is only called when I reload the page and not when I click on the
send button.
Who can help me or tell me how to better call the python script once I
click on the send button.
I'll be grateful for your help.

This is what my code looks like:

<form id="frmmain" name="frmmain" method="post">
<input type="text" id="txt_message" name="txt_message" style="width:
400px;" />
<input type="button" name="btn_send" id="btn_send" value="Send"
onclick="<% system(@path + 'myfile.py ' + @partner + ' txt_message.value
&') %>" />
</form>
--

I think you have a basic misunderstanding of how erb templates work.
Anything in <% or <%= tags is evaluated when the template is rendered
- that is what rendering an erb template means. Furthermore, an
onclick options can only be a chunk of javascript.
As Matt says, you need to write a controller action that your form is
submitted to. Furthermore, be careful of the data you receive - if the
example you posted worked it would allow a user to run arbitrary shell
commands on your server.

Fred

I'll try writing a controller action.

The idea with the controller action was really a good one.
Now I can call the pythonscript without problem while clicking on a
link, but it still cannot read from the form.
How can I do this, or what should be written at the place of :msg =>
"$('txt_message').value".

Read up about the :with option to link to remote (I wrote a bit about
it a while ago: http://www.spacevatican.org/2008/5/17/with-or-without-you-link_to_remote-s-mysterious-parameter
  )

Fred