db/migrate/005_add_photo_metadata.rb @@ -10,18 +10,16 @@ h3. There are many existing photo gallery apps around, but none I could find dem * Lightboxing effects using "Leandro Vieira Pinho's jQuery lightBox":http://leandrovieira.com/projects/jquery/lightbox/ * Photo Gallery courtesy of "Galleria":http://devkick.com/lab/galleria/ * Textboxing effects using "Cody Lindley's ThickBox":http://jquery.com/demo/thickbox/ - * Multiple file upload client "SWFUpload":http://swfupload.org/ * Thin controllers with "James Golick's resource_controller":http://jamesgolick.com/resource_controller * File uploads and thumbnail generation with "Thoughtbot's Paperclip":http://www.thoughtbot.com/projects/paperclip - * File storage with Amazon S3 * User Registration with "Rick Olson's restful_authentication":http://github.com/technoweenie/restful-authentication - * [THIS HAS BEEN REMOVED because of sqlite issues] Permalinks (SEO) using "Randomba's friendly_id":http://github.com/norman/friendly_id/tree/master * Organized nested routes as described in "Regulators!!! Mount up":http://giantrobots.thoughtbot.com/2008/7/10/regulators-mount-up h3. You will need the following additional gems installed: * sudo gem install mime-types http://mime-types.rubyforge.org/ * sudo gem install right_aws (If you want to use Amazon S3 for storage, although paperclip + S3 is a bit slow) + * sudo gem install exif (used to store jpg metadata like when the photo was taken, aperture, f stop, etc.) h3. To install and run the app: @@ -33,4 +31,7 @@ h3. To install and run the app: * rake db:migrate * rake db:bootstrap * script/server - \ No newline at end of file + +h4. SQLite and Ruby 1.9 support courtesy of "ahaller":http://github.com/ahaller + +h4. Idea for photo EXIF extraction courtesy of "nofxx":http://github.com/nofxx \ No newline at end of file README.textile @@ -19,4 +19,26 @@ class Photo < ActiveRecord::Base validates_attachment_presence :image validates_attachment_content_type :image, :content_type => ['image/jpeg', 'image/gif', 'image/png', 'image/pjpeg', 'image/x-png'] + # This is the datetime format EXIF datetime is represented in + @@exif_date_format = '%Y:%m:%d %H:%M:%S' + + # Define Paperclip callback just for the Photo attachment + after_image_post_process :post_process_image + + # Callback after styles processing (thumbnails). + # Use this to extract Exif metadata from the image + def post_process_image + # only works with jpgs + if image.content_type == 'image/jpeg' || 'image/pjpeg' + img_meta = EXIFR::JPEG.new(image.queued_for_write[:original].path) + return unless img_meta + logger.debug "Photo EXIF: " + img_meta.inspect + self.camera_model = img_meta.model + self.exposure_time = img_meta.exposure_time.to_s + self.f_number = img_meta.f_number.to_s + self.taken_at = img_meta.date_time + # also have width and height. See http://exifr.rubyforge.org/api/index.html for details + end + end + end app/models/photo.rb @@ -52,7 +52,12 @@ <div id="main_image"></div> <ul class="album"> <% @object.public_photos.each_with_index do |photo, index| -%> - <li<%= " class='active'" if index == 0 %>><%= link_to image_tag(photo.image.url(:thumb), :size => '50x50', :alt => h(photo.title)), photo.image.url, :title => photo.title %></li> + <% + # add some exif data. Not really necessary, but here to show you how to display this info. + title = photo.title + title = "#{title} - Taken with #{photo.camera_model} on #{photo.taken_at.strftime('%b %d, %Y')}" if photo.camera_model and photo.taken_at + -%> + <li<%= " class='active'" if index == 0 %>><%= link_to image_tag(photo.image.url(:thumb), :size => '50x50', :alt => h(photo.title)), photo.image.url, :title => title %></li> <% end -%> </ul> <p class="nav"><a href="#" onclick="$.galleria.prev(); return false;">&laquo; previous</a> | <a href="#" onclick="$.galleria.next(); return false;">next &raquo;</a></p> app/views/albums/show.html.erb @@ -40,7 +40,8 @@ Rails::Initializer.run do |config| # config.gem 'mime-types' config.gem 'giraffesoft-resource_controller', :version => '~> 0.6.1', :lib => 'resource_controller', :source => 'http://gems.github.com' config.gem 'mislav-will_paginate', :version => '~> 2.3.2', :lib => 'will_paginate', :source => 'http://gems.github.com' - config.gem 'thoughtbot-paperclip', :version => "~> 2.2.7",:lib => 'paperclip', :source => 'http://gems.github.com' + config.gem 'thoughtbot-paperclip', :version => "~> 2.2.7",:lib => 'paperclip', :source => 'http://gems.github.com' + config.gem 'exifr' # Only load the plugins named here, in the order given. By default, all plugins # in vendor/plugins are loaded in alphabetical order. config/environment.rb 0fd02b4c1a5550a737df40032d4eb654e3d3300a Dave Rapin dave@rapin.com http://github.com/rapind/albumdy/commit/8e99afc6962e7e4cd30465d28e16daff645a7ef6 8e99afc6962e7e4cd30465d28e16daff645a7ef6 2009-07-14T09:54:44-07:00 2009-07-14T09:54:44-07:00 updated readme with credits and new gem. Added EXIF meta data extraction from photos. Need to run rake db:migrate 91ddfcd85be465a4a0738fb5093acfaf11c65680 Dave Rapin dave@rapin.com