Reading documentation thoroughly is always good. A member of
#rubyonrails on freenode helped me out. Since uploading worked fine,
I didn't think to check my model. I had neglected to add the
content_type column. Oops.
On Feb 18, 8:16 pm, lostsync <lost.s...@gmail.com> wrote:
> My project is for a photographer's portfolio. He's allowed to upload
> photographs, which are then displayed on the site. I'm using
> attachment_fu. All of this works fine.
>
> Where I'm running into problems is in allowing him to edit the
> photographs' attributes later.
>
> Example:
> I've uploaded a picture of a spider. During the upload I enter the
> title as "spider 1". Great, the photo uploads, and if I go to to
> admin/index, there it is. Glorious. But oops! I forgot to
> capitalize my title! So I head to admin/edit/:photo_id, a form
> displays, and I correct my mistake. Then I click Update. And oh
> no. :(
>
> NoMethodError in AdminController#update
>
> undefined method `content_type' for #<Photo:0xb67ffbf0>
>
> I've been working on this problem for a while now. Commenting out
> everything attachment_fu related in my Photos model is the only way I
> can make the edit form work (which of course breaks uploading).
>
> Here is all relevant code:
>
> models/photo.rb:
>
> class Photo < ActiveRecord::Base
>
> attr_accessible :title, :description, :camera, :time, :date, :iso, :lens,
> :focal_length, :exposure, :aperture
>
> has_attachment :content_type => :image,
> :storage => :file_system,
> :path_prefix => 'public/photos',
> :thumbnails => { :thumb => '320x200>' }
> validates_as_attachment
> validates_uniqueness_of :filename
>
> def full_filename(thumbnail = nil)
> file_system_path = (thumbnail ? thumbnail_class :
> self).attachment_options[:path_prefix].to_s
> File.join(RAILS_ROOT, file_system_path, thumbnail_name_for
> (thumbnail))
> end
>
> def exifize(photo)
> require 'mini_exiftool'
> @photo = photo
> @exif = MiniExiftool.new "public/photos/#{ @photo.filename }"
> @photo.camera = @exif.model
> @photo.time = @exif.datetimeoriginal.strftime('%I:%M %p')
> @photo.date = @exif.datetimeoriginal.strftime('%B %d, %Y')
> @photo.iso = @exif.iso
> @photo.lens = @exif.lens
> @photo.focal_length = @exif.focal_length
> @photo.aperture = @exif.aperture
> @photo.save
> end
> end
>
> controllers/admin_controller.rb:
>
> def new
> @photo = Photo.new(params[:photo])
> end
>
> def create
> @photo = Photo.new(params[:photo])
> @photo.exifize(:photo)
> @photo.save
> if @photo.save
> flash[:notice] = 'Yay!'
> redirect_to :controller => 'admin', :action => :index
> else
> flash[:error] = 'boo...'
> redirect_to :controller => 'admin', :action => :error
> end
> end
>
> views/admin/edit.html.erb:
>
> <% form_for :photo, :url => { :controller => 'admin',
> :action => 'update',
> :id => @photo } do |f| %>
>
> <p>
> <%= f.label :title %><br />
> <%= f.text_field :title %>
> </p>
> <p>
> <%= f.label :description %><br />
> <%= f.text_area :description %>
> </p>
> <p>
> <%= f.label :camera %><br />
> <%= f.text_field :camera %>
> </p>
>
> ...etc...
>
> <p>
> <%= f.submit "Update" %>
> </p>
> <% end %>
>
> I'm lost. Please help.
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