Added pdf file upload

app/models/job.rb

@@ -2,6 +2,10 @@ class Job < ApplicationRecord
   belongs_to :operator, class_name: 'User', optional: true
   belongs_to :costumer, class_name: 'User', optional: true
 
+  has_one_attached :pdf
+
+  validates_presence_of :costumer_firstname, :costumer_lastname, :privacy_policy_accepted, :pdf
+
   # NOTE: Multiple status if paing before brinting?
   enum status: {
     open: 0,
@@ -32,4 +36,16 @@ class Job < ApplicationRecord
   def fullname
     [costumer_firstname, ' ', costumer_lastname].join
   end
+
+  # TODO: Implement validation
+  def acceptable_pdf
+    return unless pdf.attached?
+
+    errors.add(:main_image, 'is too big') unless main_image.blob.byte_size <= 100.megabyte
+
+    acceptable_types = ['application/pdf']
+    return if acceptable_types.include?(main_image.content_type)
+
+    errors.add(:main_image, 'must be a PDF')
+  end
 end