Reset stuck exports

db/migrate/20170813222333_reset_export_states.rb

+class ResetExportStates < ActiveRecord::Migration[5.1]
+  class User < ApplicationRecord
+  end
+
+  def up
+    # rubocop:disable Rails/SkipsModelValidations
+    User.where(exporting: true).update_all(exporting: false, export: nil, exported_at: nil)
+    User.where(exporting_photos: true)
+        .update_all(exporting_photos: false, exported_photos_file: nil, exported_photos_at: nil)
+    # rubocop:enable Rails/SkipsModelValidations
+  end
+end