Multiple Paramters and observe_field :with

Rails
1

Hi All:

I have searched high and low with no success. Does anyone know of a way
to pass the values of more than one form field through the :with
parameter of observe_field?

Basically I have two fields on the form with number values. When the
user changes the value of one I would like to send the values of both
fields to the controller for calculations and return the result to the
user on the form. If I only pass one of the fields (i.e.
“‘volume=’+value”) I can get a respnse back to the form, so I am pretty
sure all my code is good…

I also looked into observe_form but couldn’t get the Form.serialize
thing to work. I only want to pass the two values, not the entire form
which has a considerable amount of inputs on it anyway.

I did find a hint on the Rails wiki:
http://wiki.rubyonrails.org/rails/pages/observe_field+-+Passing+Parameters

Though despite my efforts to copy the syntax given in the example, I
couldn’t get it to work either. Any ideas?

Thanks,
David

2

Anybody out there?

3

Hello:

Just in case someone ever reads this…I found a solution, which you can
see on the Rails wiki:
http://wiki.rubyonrails.org/rails/pages/observe_field+-+Passing+Parameters

The solution involved concatenating a string of values from various form
feilds using the $F function from the Prototype library. Good Luck…

David

4

David H. wrote:

Hello:

Just in case someone ever reads this…I found a solution, which you can
see on the Rails wiki:
http://wiki.rubyonrails.org/rails/pages/observe_field+-+Passing+Parameters

The solution involved concatenating a string of values from various form
feilds using the $F function from the Prototype library. Good Luck…

David

Why not use observe_form?

It will monitor all the fields in your form, and you can act only in the
specific cases you need to process.

Jeff C.man