Rails - Sep 2007 - Building a relationship between an image and a listing

http://khamsouk.souvanlasy.com/2007/5/1/ajax-file-uploads-in-rails-using-attachment_fu-and-responds_to_parent

I followed this tutorial, and would like to implement it into my
restaurant listing creation form. I am having troubles and am kind of
stuck, please guide me?

Here''s my MVC

_form.rhtml
[code=]<%= error_messages_for ''restaurant'' %>

<!--[form:restaurant]-->
<p><label
for="restaurant_name">Name</label><br/>
<%= text_field ''restaurant'', ''name'' 
%></p>

<p><label
for="restaurant_location">Address</label><br/>
<%= text_field ''restaurant'', ''location'' 
%></p>

<p><label for="restaurant_contact">Telephone number (incl
area
code)</label><br/>
<%= text_field ''restaurant'', ''contact'' ,
''size'' => 10 , ''maxlength'' =>
10 %></p>

<p><label
for="restaurant_category_id">Category:</label><br/>
<%= select("restaurant", "category_id",
Category.find(:all).collect {|c|
[c.name, c.id] }) %></p>

<p><label for="restaurant_description">Keywords used for
the live search
(chicken, seafood, BBQ, etc.)</label><br/>
<%= text_area "restaurant", "description" %></p>

<p><label for="restaurant_featured">Featured
Listing?</label><br/>
 <%=check_box ''restaurant'',''featured''
%>
<%= observe_field (:restaurant_featured,
  :function => "Effect.toggle(''url'',
''appear'', {queue: {position: ''end'',
scope: ''featuredscope'', limit: 2} })") %>
<div id="url" <%=
"style=''display:none''" unless
@restaurant.featured==1
%>>
<p><label
for="restaurant_url">Url</label><br/>
<%= text_field ''restaurant'', ''url'' 
%></p>

<p><label for="restaurant_ccards">Accepts Credit
Cards?</label><br/>
<select name="restaurant[ccards]"><%=
options_for_select([["Yes", "y"],
["No", "n"], ["Not Available", "x"]])
%></select>
</p>

<p><label for="restaurant_reservations">Accepts
Reservations?</label><br/>
<select name="restaurant[reservations]"><%=
options_for_select([["Yes",
"y"], ["No", "n"], ["Not Available",
"x"]]) %></select>
</p>

<p><label for="restaurant_kids">Allow
Children?</label><br/>
<select name="restaurant[kids]"><%=
options_for_select([["Yes", "y"],
["No", "n"], ["Not Available", "x"]])
%></select>
</p>

<p><label for="restaurant_fpage">Don''t Show On
The Front
Page?</label><br/>
<%= check_box ''restaurant'', ''fpage'' 
%></p>

<%= javascript_include_tag :defaults %>
<h1>Listing assets</h1>

<ul id="assets">
<% @assets.each do |asset| %>
<%= render(:partial => ''/assets/list_item'', :object
=> asset)%>
<% end %>
</ul>

<br />

<% form_for(:asset, :url =>formatted_assets_path(:format =>
''js''), :html
=> { :multipart => true, :target => ''upload_frame''})
do |form| %>
<%= render(:partial => ''/assets/form'', :object =>
form) %>
<% end %>
<iframe id=''upload_frame'' name="upload_frame"
style="width:1px;height:1px;border:0px"
src="about:blank"></iframe>
</div>


<p><label for="restaurant_created_at">Created
at</label><br/>
<%= @restaurant.created_at  %></p>

<p><label for="restaurant_updated_at">Updated
at</label><br/>
<%= @restaurant.updated_at  %></p>
<!--[eoform:restaurant]-->[/code]
admin_controller.rb
[code=]class AdminController < ApplicationController
before_filter :login_required

  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
    @restaurant_pages, @restaurants = paginate :restaurants, :per_page
=> 100

  end


  def show
    @restaurant = Restaurant.find(params[:id])
  end

  def new
    @restaurant = Restaurant.new
    @categories = Category.find(:all)
    @asset = Asset.new(params[:asset])
  end

  def create
    @restaurant = Restaurant.new(params[:restaurant])
    @restaurant.add_picture(params[:asset])
    if @restaurant.save
      flash[:notice] = ''Restaurant was successfully created.''
      redirect_to :action => ''list''
    else
      render :action => ''new''
    end
     @asset = Asset.new(params[:asset])
  respond_to do |format|
    if @asset.save
      flash[:notice] = ''Asset was successfully created.''
      format.html { redirect_to asset_url(@asset) }
      format.xml  { head :created, :location => asset_url(@asset) }
      format.js do
        responds_to_parent do
          render :update do |page|
            page.insert_html :bottom, "assets", :partial =>
''assets/list_item'', :object => @asset
            page.visual_effect :highlight, "asset_#{@asset.id}"
          end
        end
      end
    else
      format.html { render :action => "new" }
      format.xml  { render :xml => @asset.errors.to_xml }
      format.js do
        responds_to_parent do
          render :update do |page|
              # update the page with an error message
          end
        end
      end
    end
  end
  end

  def edit
    @restaurant = Restaurant.find(params[:id])
    @categories = Category.find(:all)
    # use has_picture?
    @asset = Asset.find(params[:restaurant_id])

  end

  def update
    @restaurant = Restaurant.find(params[:id])
    @restaurant.add_picture(params[:asset])
    if @restaurant.update_attributes(params[:restaurant])
      flash[:notice] = ''Restaurant was successfully updated.''
      redirect_to :action => ''show'', :id => @restaurant
    else
      render :action => ''edit''
    end
        @asset = Asset.find(params[:id])

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


  def destroy
    Restaurant.find(params[:id]).destroy
    @asset = Asset.find(params[:id])
    @asset.destroy

    respond_to do |format|
      format.html { redirect_to assets_url }
      format.xml  { head :ok }
      format.js
    end
    redirect_to :action => ''list''
  end
end[/code]
asset.rb(picture model)
[code=]class Asset < ActiveRecord::Base
belongs_to :restaurant
  has_attachment  :storage => :file_system,
                  :max_size => 1.megabytes,
                :resize_to => ''320x200>'',
                  :processor => :MiniMagick, # attachment_fu looks in
this order: ImageScience, Rmagick, MiniMagick
                  :content_type => :image

  validates_as_attachment # ok two lines if you want to do validation,
and why wouldn''t you?
end[/code]
restaurant.rb
[code=]class Restaurant < ActiveRecord::Base

def has_picture?
self.asset.nil? ? false : true
end
def add_picture(picture = nil)
  return if asset.nil? or picture[:uploaded_data]== ""
  @pic = Picture.new(picture)
  self.picture = @pic
end
belongs_to :category
has_one :asset
before_validation do |restaurant|
    %w(image_path contact).each do |attribute|
      restaurant[attribute] = nil if restaurant[attribute].blank?
    end
   end
validates_presence_of :name, :category, :location
validates_uniqueness_of :name

validates_format_of :contact,
  :with =>
/^([a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]|[1]?[\-|\s|\.]?\(?[0-9]{3}\)?[\-|\s|\.]?[0-9]{3}[\-|\s|\.]?[0-9]{4})$/,
  :message => "is not a valid phone number (incl. area code)",
  :allow_nil => true

end[/code]
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to make it a little easier on the eyes: http://pastie.caboo.se/96092
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On Sep 11, 7:44 am, Dave Barnow
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> to make it a little easier on the eyes:http://pastie.caboo.se/96092
> --
> Posted viahttp://www.ruby-forum.com/.
maybe you could state your problem, or ask a question.


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gene tani wrote:
> On Sep 11, 7:44 am, Dave Barnow
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
> wrote:
>> to make it a little easier on the eyes:http://pastie.caboo.se/96092
>> --
>> Posted viahttp://www.ruby-forum.com/.
> 
> maybe you could state your problem, or ask a question.
Well when I go to make a new listing, I get this error.
http://pastie.caboo.se/96155

When I go to edit a listing, I get this error.
http://pastie.caboo.se/96157
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