Excluding some ActiveRecord properties from xml rendering in rails

def show
  @person = Person.find(params[:id])
  respond_to do |format|
    format.xml { render :xml => @person }
  end
end

def show
  @person = Person.find(params[:id])
  respond_to do |format|
    format.xml { render :xml => @person, :exclude_attribute => :phone }
  end
end

def show
  @person = Person.find(params[:id])
  respond_to do |format|
    format.xml { render :xml => @person, :exclude_attribute => :phone }
  end
end

:only

def show
  @person = Person.find(params[:id])
  respond_to do |format|
    format.xml { render :text => @person.to_xml, :except => [:phone] }
  end
end

class Person < ActiveRecord::Base
 def to_xml
  super(:except => [:phone])
 end
 def to_json
  super(:except => [:phone])
 end
end

class PeopleController < ApplicationController
  # GET /people
  # GET /people.xml
  def index
    @people = Person.all

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

def show
  @person = Person.find(params[:id])
  respond_to do |format|
    format.xml { render :text => @person.to_xml(:except => [:phone]) }
  end
end