Use PictureUploader on Sponsor

app/controllers/admin/sponsors_controller.rb

@@ -49,7 +49,7 @@ module Admin
     private
 
     def sponsor_params
-      params.require(:sponsor).permit(:name, :description, :website_url, :logo, :sponsorship_level_id, :conference_id)
+      params.require(:sponsor).permit(:name, :description, :website_url, :picture, :picture_cache, :sponsorship_level_id, :conference_id)
     end
   end
 end

app/helpers/sponsors_helper.rb

@@ -2,11 +2,11 @@ module SponsorsHelper
   # returns the url to be used for logo on basis of sponsorship level position
   def get_logo(sponsor)
     if sponsor.sponsorship_level.position == 1
-      sponsor.logo.url(:first)
+      sponsor.picture.first.url
     elsif sponsor.sponsorship_level.position == 2
-      sponsor.logo.url(:second)
+      sponsor.picture.second.url
     else
-      sponsor.logo.url(:others)
+      sponsor.picture.others.url
     end
   end
 end

app/models/sponsor.rb

@@ -1,21 +1,8 @@
 class Sponsor < ActiveRecord::Base
   belongs_to :sponsorship_level
   belongs_to :conference
-  has_attached_file :logo,
-                    styles: { thumb: '100x100>',
-                              first: '320x180>',
-                              second: '320x150>',
-                              others: '320x120>' },
-                    # places logo on a white background to maintain size
-                    convert_options: {
-                      first: '-background white -gravity center -extent 320x180',
-                      second: '-background white -gravity center -extent 320x150',
-                      others: '-background white -gravity center -extent 320x120'
-                    }
 
-  validates_attachment_content_type :logo,
+  mount_uploader :picture, PictureUploader, mount_on: :logo_file_name
-                                    content_type: [/jpg/, /jpeg/, /png/, /gif/],
-                                    size: { in: 0..500.kilobytes }
 
-  validates_presence_of :name, :website_url, :sponsorship_level, :logo
+  validates_presence_of :name, :website_url, :sponsorship_level
 end

app/uploaders/picture_uploader.rb

@@ -50,17 +50,17 @@ class PictureUploader < CarrierWave::Uploader::Base
 
   version :first, if: :sponsor?
   version :first do
-    process resize_to_fill: [320, 180]
+    process resize_and_pad: [320, 180, 'white']
   end
 
   version :second, if: :sponsor?
   version :second, from_version: :first do
-    process resize_to_fill: [320, 150]
+    process resize_and_pad: [320, 150, 'white']
   end
 
   version :others, if: :sponsor?
   version :others, from_version: :second do
-    process resize_to_fill: [320, 120]
+    process resize_and_pad: [320, 120, 'white']
   end
 
   # Add a white list of extensions which are allowed to be uploaded.

app/views/admin/sponsors/_form.html.haml

@@ -11,8 +11,8 @@
     = semantic_form_for(@sponsor, :url => (@sponsor.new_record? ? admin_conference_sponsors_path : admin_conference_sponsor_path(@conference.short_title, @sponsor))) do |f|
       = f.input :name
       = f.input :description
-      = image_tag f.object.logo(:thumb) if !f.object.logo.blank?
+      = image_tag f.object.picture.thumb.url if f.object.picture?
-      = f.input :logo
+      = f.input :picture
       = f.input :website_url
       = f.input :sponsorship_level, collection: @conference.sponsorship_levels
       %p.text-right

app/views/admin/sponsors/index.html.haml

@@ -19,7 +19,7 @@
           - @conference.sponsors.each do |sponsor|
             %tr
               %td
-                = image_tag(sponsor.logo(:thumb), width: '20%')
+                = image_tag(sponsor.picture.thumb.url, width: '20%')
               %td
                 = sponsor.name
               %td