Rails - Dec 2005 - Modifying data before update or save

Hi,

I''d like to upcase a variable before it is saved, but I''m not
sure how
to access the incoming param or where this work should be performed:

In my update method, I have:

@device = Device.find(params[:id])
    params[:device[macaddress]].upcase  <-- problem code
    if @device.update_attributes(params[:device])
....usual stuff here

''macaddress'' is the variable I''d like to upcase.

Does anybody have suggestions?

- Nic.

Nic,

In your model, I think you want to hook into the before_save callback, like:

before_save :normalize

def normalize
  macaddress.upcase!
  #other modifications here
end

Hope that helps,
Regards,
Ed C.

On 12/19/05, Nic Werner
<nicwerner-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi,
>
> I''d like to upcase a variable before it is saved, but I''m
not sure how
> to access the incoming param or where this work should be performed:
>
> In my update method, I have:
>
> @device = Device.find(params[:id])
>     params[:device[macaddress]].upcase  <-- problem code
>     if @device.update_attributes(params[:device])
> ....usual stuff here
>
> ''macaddress'' is the variable I''d like to upcase.
>
> Does anybody have suggestions?
>
> - Nic.
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

On Mon, Dec 19, 2005 at 08:48:20PM -0800, Nic Werner
wrote:
> I''d like to upcase a variable before it is saved, but I''m
not sure how
> to access the incoming param or where this work should be performed:
> 
> In my update method, I have:
> 
> @device = Device.find(params[:id])
>     params[:device[macaddress]].upcase  <-- problem code
>     if @device.update_attributes(params[:device])
> ....usual stuff here
> 
> ''macaddress'' is the variable I''d like to upcase.
> 
> Does anybody have suggestions?
You could use a before_save callback in the Device model.

class Device < ActiveRecord::Base
  before_save :normalize_macaddress

  # ...

  private
    def normalize_macaddress
      self.macaddress = macaddress.upcase if macaddress
    end
end

marcel
-- 
Marcel Molina Jr. <marcel-WRrfy3IlpWYdnm+yROfE0A@public.gmane.org>