I have an app that engages physical files of several types. Each type has different metadata associated, so i've broken them out in different models. To keep thing simple, I'll just deal use images in my example.
I have an images table (with an Image model) that stores fuzzy info like title, description, rating, etc. The Image model belongs_to a Binary model that is backended by a binaries table with physical file metadata (name, extension, size, MIME Type, etc.). My Binary model is _only_ a model. There's no controller or set of views because I really want all interaction to occur through the typed model.
I have an Images controller with the relevant views and I'd like to
accept an upload there, but then delegate to the Binary model for
handling everything related to the physical file itself (uploading,
extracting properties, saving to a new location, etc.). I can't seem
to get that to work and my Ruby/Rails n00b-ness isn't helping me at
all. 
Some of my syntax may simply be incorrect - I'm struggling
with the Ruby idioms, coming from a long history of C-style syntax. In
many cases, I've tried several variations, but I'm just going to paste
what I have now. In other cases, I'm including snippets of code that
I've seen elsewhere, but don't completely understand yet
(attr_accessor is a good example).
I'm hoping someone here can help point me in the right direction. The error that I'm currently getting is:
undefined method `original_path' for "online-resume-req.txt":String
It seems that the upload, in its entirely, is never making it to the server. I'm only getting the file name as a string. Code follows:
ImagesController::create()
def create @image = Image.new(params[:image]) @binary = Binary.new
if ( @binary.upload(params[:image][:uploaded_file]) ) #do stuff end end
views/images/_form.html.erb
<% form_for( @image, :multipart => true ) do |f| %> <%= f.error_messages -%>
<p> <%= label_tag( 'image_uploaded_file', 'File' ) -%> <%= file_field( :image, :uploaded_file ) -%> </p> <p> <%= f.label :name %> <%= f.text_field :name %> </p> <p> <%= f.label :description %> <%= f.text_area( :description ) %> </p> <p><%= f.submit( 'Upload' ) %></p> <% end %>
Image model:
class Image < ActiveRecord::Base belongs_to :binary
validates_presence_of( :uploaded_file )\
attr_accessor :uploaded_file end
Binary model
class Binary < ActiveRecord::Base has_one :image
def upload(uploaded_file) logger.info( 'Uploading: ' + uploaded_file.to_json )
self.name = uploaded_file.original_path self.mime_type = uploaded_file.content_type save_as = Rails.root.join( 'public', 'bin', '_tmp', uploaded_file.original_path )
File.open( save_as, 'w' ) do |file| file.write( uploaded_file.read ) end
self.size = File.size( "#{save_as}" )
logger.info( 'Set file size to ' + self.size.to_s )
self.save
logger.info( 'Stored' ); end end