Using created_at instead of legacy 'uploaddatetime' field

app/models/screenshot.rb

@@ -2,7 +2,7 @@ class Screenshot < ActiveRecord::Base
   belongs_to :package, :inverse_of=>:screenshots
 
   default_scope {
-    order('uploaddatetime DESC')
+    order('created_at DESC')
   }
 
   has_attached_file :image,
@@ -29,7 +29,11 @@ class Screenshot < ActiveRecord::Base
 
   # Calculate how many days ago this screenshot has been uploaded
   def age_days
-    seconds = Time.now-self.uploaddatetime
+    if self.created_at
+      seconds = Time.now - self.created_at
+    else
+      seconds = 0
+    end
     days = (seconds/86400).to_i
     days ? "#{days} days ago" : 'today'
   end

app/views/packages/details.slim

@@ -25,7 +25,7 @@
                   ] Delete screenshot
 
                 p Uploader IP=#{screenshot.uploaderip}
-                p Uploaded #{screenshot.age_days} (#{screenshot.uploaddatetime})
+                p Uploaded #{screenshot.age_days} (#{screenshot.created_at})
                 p Status: #{screenshot.status}
 
     - else

db/migrate/20160304140037_rename_uploaddatetime.rb

@@ -0,0 +1,6 @@
+class RenameUploaddatetime < ActiveRecord::Migration
+  def change
+    remove_column :screenshots, :created_at
+    rename_column :screenshots, :uploaddatetime, :created_at
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160302135740) do
+ActiveRecord::Schema.define(version: 20160304140037) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -45,14 +45,13 @@ ActiveRecord::Schema.define(version: 20160302135740) do
   create_table "screenshots", force: :cascade do |t|
     t.integer  "package_id"
     t.string   "version",            limit: 50
-    t.datetime "uploaddatetime"
+    t.datetime "created_at"
     t.string   "uploaderhash",       limit: 72
     t.string   "uploaderip",         limit: 15
     t.boolean  "approved"
     t.boolean  "markedfordelete"
     t.string   "delete_reason",      limit: 100
     t.string   "description",        limit: 40
-    t.datetime "created_at"
     t.datetime "updated_at"
     t.string   "image_file_name"
     t.string   "image_content_type"

lib/tasks/remove_image_duplicates.rake

@@ -17,7 +17,7 @@ namespace :debshots do
 
     loop do
       destroyed = 0
-      Screenshot.select(:package_id, :image_fingerprint).group(:package_id, :image_fingerprint, :uploaddatetime).having("count(*) > 1").each do |ss|
+      Screenshot.select(:package_id, :image_fingerprint).group(:package_id, :image_fingerprint, :created_at).having("count(*) > 1").each do |ss|
         # Look again for screenshots of this fingerprint.
         # This extra step may seem stupid but the above query lead to package_id=NULL results sometimes.
         del = Screenshot.find_by(image_fingerprint: ss.image_fingerprint)

test/fixtures/screenshots.yml

@@ -2,20 +2,20 @@
 
 # one:
 #   version: MyString
-#   uploaddatetime: 2013-07-27 13:29:55
+#   created_at: 2013-07-27 13:29:55
 #   uploaderhash: MyString
 #   uploaderip: MyString
-#   approved: 
+#   approved:
-#   markedfordelete: 
+#   markedfordelete:
 #   delete_reason: MyString
 #   description: MyString
 
 # two:
 #   version: MyString
-#   uploaddatetime: 2013-07-27 13:29:55
+#   created_at: 2013-07-27 13:29:55
 #   uploaderhash: MyString
 #   uploaderip: MyString
-#   approved: 
+#   approved:
-#   markedfordelete: 
+#   markedfordelete:
 #   delete_reason: MyString
 #   description: MyString