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## picture.rb class Picture < ActiveRecord::Base has_attachment :content_type => :image, :storage => :file_system, :max_size => 500.kilobytes, :resize_to => '320x200>', :thumbnails => { :thumb => '100x100>' } validates_as_attachment end ## message.rb class Message < ActiveRecord::Base end ## messages_controller.rb class MessagesController < ApplicationController def index list render :action => 'list' end # GETs should be safe (see http://www.w3.org/2001/tag/doc/whenToUseGet.html) verify :method => :post, :only => [ :destroy, :create, :update ], :redirect_to => { :action => :list } def list @message_pages, @messages = paginate :messages, :per_page => 10 end def show @message = Message.find(params[:id]) end def new @message = Message.new end def create @message = Message.new(params[:message]) @picture = Picture.new(params[:message]) if @message.save flash[:notice] = 'Message was successfully created.' redirect_to :action => 'list' else render :action => 'new' end end def edit @message = Message.find(params[:id]) end def update @message = Message.find(params[:id]) if @message.update_attributes(params[:message]) flash[:notice] = 'Message was successfully updated.' redirect_to :action => 'show', :id => @message else render :action => 'edit' end end def destroy Message.find(params[:id]).destroy redirect_to :action => 'list' end end ## new.rhtml <h1>New message</h1> <% form_for(:message, :url => { :action => 'create' }, :html => { :multipart => true }) do |f| -%> <%= render :partial => 'form' %> <%= f.file_field :uploaded_data %> <%= submit_tag "Create" %> <% end %> <%= link_to 'Back', :action => 'list' %> ## _form.rhtml <%= error_messages_for 'message' %> <!--[form:message]--> <p><label for="message_title">Title</label><br/> <%= text_field 'message', 'title' %></p> <p><label for="message_message">Message</label><br/> <%= text_field 'message', 'message' %></p> <!--[eoform:message]-->