Rails - Oct 2006 - acts_as_attachment and belongs_to:

Hi all. I''ve gotten the acts_as_attachment tutorial to work just fine.
However now i''m trying to do something that''s not covered and
keep
running into a brick wall. I''m pretty sure this is a simple concept
that I''m just not familiar with yet.

I''d like to association an image with a entry from a different model. I
suppose in other words I''m asking how to update two models from one
controllers create action. Example:

class TrackImage < ActiveRecord::Base
    belongs_to :track
    acts_as_attachment :storage => :file_system, :max_size =>
300.kilobytes, :content_type => :image
    validates_as_attachment
end

class Track < ActiveRecord::Base
  has_many :track_images
end

class Admin::TracksController < ApplicationController
## stuff omitted for brevity''s sake
  def create
    @track = Track.new(params[:track])
    if @track.save
      flash[:notice] = ''Track was successfully created.''
      @track_image = TrackImage.create! params[:track_image]
      redirect_to :action => ''list''
    else
      render :action => ''new''
    end
  end
end

## new.rhtml ##

<%= form_tag({:action => ''create''}, :multipart =>
true) %>
  <%= render :partial => ''form'' %>
  <%= submit_tag "Create" %>
<%= end_form_tag %>
<%= link_to ''Back'', :action => ''list''
%>


## _form.rhtml ##
## stuff omitted for brevity''s sake
<p><%= file_field ''track'',
''track_image'' %></p>

The above code is producting this error:
undefined method `track_image='' for #<Track:0x2278e10>


--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk
-~----------~----~----~----~------~----~------~--~---

>
> ## _form.rhtml ##
> ## stuff omitted for brevity''s sake
> <p><%= file_field ''track'',
''track_image'' %></p>
>
> The above code is producting this error:
> undefined method `track_image='' for #<Track:0x2278e10>
>
You didn''t say specifically but I assume there is where you''re
getting
the error?  Is that correct?  If so, it''s exactly as it says.  There
doesn''t exist a track_image method on the Track class.  Your
relationship indicates that you have many track_images.  Therefore you
have many track_images, not a single track_image method.  Try using a
file_field_tag instead or bind the form to the TrackImage class
instead.

Michael

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk
-~----------~----~----~----~------~----~------~--~---