Rails - Jan 2008 - Forms, database, and yes I'm new

I have  a quick question on a problem of mine.
I''ve done the ONLamp tutorial with scaffolding a recipe etc, and
honesly
I didn''t get really any wiser. So I decided to try it out on my own
without scaffolding.

However. Now I''m stuck with my edit-form. I need to update a row with
old text in the ''pres'' column in the table called
''presentations'' in my
database with a new text typed in with a form (in edit.rhtml).

My Edit method gets the ''pres'' from the
''presentations''table but it
doesn''t update the edited ''pres'' with the new text to
the database when
the submit button is clicked. I really can''t understand why not? What
is
wrong with my code?


---------------------
Model
---------------------
class Presentation < ActiveRecord::Base

    belongs_to :user

end

---------------------
controller
---------------------
class PresentationController < ApplicationController

def info
  @user_login = current_user.login
  @user_presentation = current_user.presentation.pres

end


def edit
    @presentation = current_user.presentation(params[:id])
end

def update
   @presentation = current_user.presentation(params[:id])
   if @presentation.update_attributes(params[:pres])
       redirect_to :action => ''info''

   else
      render :action => ''edit''

     end
   end
 end

---------------------
Edit view
---------------------
<% form_tag :action => ''update'', :id => @presentation
do %>


  <p><label for="pres">Edit
Information</label><br/>
  <%= text_area  ''presentation'', ''pres''
%></p>


  <p><%= submit_tag ''Update'' %></p>


<% end %>
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On 17 Jan 2008, at 11:58, Dag Stensson wrote:
>
> My Edit method gets the ''pres'' from the
''presentations''table but it
> doesn''t update the edited ''pres'' with the new
text to the database
> when
> the submit button is clicked. I really can''t understand why not?  
> What is
> wrong with my code?
>
>
> def update
>   @presentation = current_user.presentation(params[:id])
>   if @presentation.update_attributes(params[:pres])
>       redirect_to :action => ''info''
[snip]
>  <p><label for="pres">Edit
Information</label><br/>
>  <%= text_area  ''presentation'',
''pres'' %></p>
text_area (and other similar) helpers will make the submitted  
parameters available as params[:presentation] since that''s the name of
the object you''re editing.
Use   if @presentation.update_attributes(params[:presentation])
and you should be fine.

Fred

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Thank you Fred for solving my problem and explaining! Im very greatful

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