foto exif

app/models/foto.rb

@@ -15,6 +15,7 @@ class Foto < ActiveRecord::Base
   attr_accessible :datei, :desc, :gallery_id, :title
   belongs_to :gallery
   mount_uploader :datei, FotoUploader
+  before_save :parse_exif
     resourcify
     def to_jq_upload
   {
@@ -28,4 +29,11 @@ class Foto < ActiveRecord::Base
     "delete_type" => "DELETE" 
    }
   end
+    def parse_exif
+      unless self.exif.nil? || self.exif.empty?
+        j=JSON.parse(self.exif)
+        datetime = j.select {|i| i.first == "DateTime"}.try(:first).try(:last)
+        self.taken_at=Time.new(datetime) unless datetime.nil?
+      end
+    end
 end

app/uploaders/foto_uploader.rb

@@ -32,9 +32,12 @@ class FotoUploader < CarrierWave::Uploader::Base
   # end
 
   # general settings
+
   process :fix_exif_rotation
+  process :store_exif
   process :strip
   process :convert => 'jpg'
+  
 
   # Create different versions of your uploaded files:
    version :thumb do
@@ -62,5 +65,9 @@ class FotoUploader < CarrierWave::Uploader::Base
   #   "something.jpg" if original_filename
   # end
 
-
+   def store_exif
+     img = Magick::Image.read(current_path)
+     model.exif=img.first.get_exif_by_entry().to_json
+  
+   end
 end

db/migrate/20150401111040_add_exif_to_foto.rb

@@ -0,0 +1,6 @@
+class AddExifToFoto < ActiveRecord::Migration
+  def change
+    add_column :fotos, :exif, :string
+    add_column :fotos, :has_exif, :boolean
+  end
+end

db/migrate/20150401115254_add_date_to_foto.rb

@@ -0,0 +1,5 @@
+class AddDateToFoto < ActiveRecord::Migration
+  def change
+    add_column :fotos, :taken_at, :timestamp
+  end
+end