tags:

views:

25

answers:

1
Q: 

rails: pass value of a text field to a helper function

I'm sure this is a basic question... I have a nested form where the nested object contains a text field. There is a link_to_function in the form that calls some javascript. I want to pass the javascript function the value of a hidden field in the form (image_type_id).

Can I reference this with some ruby or does this need javascript?

A: 

Pass this (or this.parent, depending on where your link is on the form) and use jQuery on the Javascript side to get the hidden value.

Júlio Santos  2010-10-11 06:45:34
thanks. what is "this"? A hash of field names and values?
nktokyo  2010-10-11 06:55:56
@Julio Santos: Why jQuery? It can be anything right? And I am guessing this most certainly would be Prototype, which is the default with Rails?
Swanand  2010-10-11 07:20:30
@nktokyo"this" is, well, that :) Picture the following:<form onsubmit="doSomething(this)">...</form>When the javascript function doSomething(form) is called, inside it you can refer to the form as a DOM element.@SwanandSure, jQuery is just what I'm used to, even with Rails. But you can use anything.
Júlio Santos  2010-10-11 11:01:49
@nktokyo For instance, if inside the function you did (this is jQuery) $(form).hide(), this would hide the form. That's the use of "this".
Júlio Santos  2010-10-11 11:02:59
Thanks, I was able to figure it out from your hint
nktokyo  2010-10-11 14:16:22

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