saving data from database to text/yaml file

Hello all...

I am new to rails.
I have a rails app in which i want data from my database table into a
text file.

I have a notices table that has three fields - title, body and user. I
want this data to be stored in a text or yaml file.

Here is the code of what I am trying to do... But I am not able to get
it done.

def save
  @notice = Notice.find(params[:id])
         f = File.new("#{RAILS_ROOT}/public/notice.txt","w")
    debugger
  f.write @notice
  f.close
  end

Please help me.

@notice is an object. you need to write each attribute to the file.

f.write @notice.title
f.write @notice.body
f.write @notice.user

Thank you for your reply...
I am posting code for my controller - notices.
The save method is at the last. I am not able to link and call this
method and its not working as well.
Please correct the code and help me.

class NoticesController < ApplicationController

  def index
    @notices = Notice.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml { render :xml => @notices }
    end
  end

  def show
    @notice = Notice.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml { render :xml => @notice }
    end
  end

  def new
    @notice = Notice.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml { render :xml => @notice }
    end
  end

  def edit
    @notice = Notice.find(params[:id])
  end

  def create
    @notice = Notice.new(params[:notice])

    respond_to do |format|
      if @notice.save
        flash[:notice] = 'Notice was successfully created.'
        format.html { redirect_to(@notice) }
        format.xml { render :xml => @notice, :status
=> :created, :location => @notice }
      else
        format.html { render :action => "new" }
        format.xml { render :xml => @notice.errors, :status
=> :unprocessable_entity }
      end
    end
  end

  def update
    @notice = Notice.find(params[:id])

    respond_to do |format|
      if @notice.update_attributes(params[:notice])
        flash[:notice] = 'Notice was successfully updated.'
        format.html { redirect_to(@notice) }
        format.xml { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml { render :xml => @notice.errors, :status
=> :unprocessable_entity }
      end
    end
  end

  def destroy
    @notice = Notice.find(params[:id])
    @notice.destroy

    respond_to do |format|
      format.html { redirect_to(notices_url) }
      format.xml { head :ok }
    end
  end

  def save
     @notice = Notice.find(params[:id])
     f = File.new("#{RAILS_ROOT}/public/jar/notice.txt","w")
    f.write @notice.title
    f.write @notice.body
    f.write @notice.user_name
    f.close
    end

end