Added eager loading

app/models/job.rb

@@ -2,7 +2,7 @@ class Job < ApplicationRecord
   belongs_to :operator, class_name: 'User', optional: true
   belongs_to :costumer, class_name: 'User', optional: true
 
-  has_one_attached :pdf
+  has_one_attached :pdf, dependent: :destroy
 
   validates_presence_of :costumer_firstname, :costumer_lastname, :privacy_policy_accepted, :pdf
   validate :acceptable_pdf
@@ -32,7 +32,7 @@ class Job < ApplicationRecord
                             where('upgraded_at >= ? AND upgraded_at <= ?', date.beginning_of_day, date.end_of_day)
                           }
   # Returns all jobs with status: open print ready_for_pickup and jobs from today with status: paid canceled
-  # paid: only printed_at today
+  # paid: only updated_at today
   # canceled: only updated_at today
   def self.currently_working_on
     # NOTE: use Time.now instead of Date.today to take the timezone into account
@@ -42,6 +42,8 @@ class Job < ApplicationRecord
       # .in_status_order
       .order(created_at: :desc)
       .order(:costumer_firstname, :costumer_lastname)
+      .with_attached_pdf # scope from activestorage for .includes(pdf_attachment: :blob)
+    # .references(:pdf_attachment, :blob) # creates big join table
   end
 
   def fullname