changing view for group_order_invoices

testing ui of goi restructuring

app/models/group_order_invoice.rb

@@ -1,10 +1,18 @@
 class GroupOrderInvoice < ApplicationRecord
+
   belongs_to :group_order
   validates_presence_of :group_order
   validates_uniqueness_of :invoice_number
   validate :tax_number_set
   after_initialize :init, unless: :persisted?
 
+  enum sequence_type: {
+    FRST: "Erst-Lastschrift",
+    RCUR: "Folge-Lastschrift",
+    OOFF: "Einmalige Lastschrift",
+    FNAL: "Letztmalige Lastschrift"
+  }
+
   def generate_invoice_number(count)
     trailing_number = count.to_s.rjust(4, '0')
     if GroupOrderInvoice.find_by(invoice_number: self.invoice_date.strftime("%Y%m%d") + trailing_number)
@@ -20,6 +28,16 @@ class GroupOrderInvoice < ApplicationRecord
     end
   end
 
+  def mark_sepa_downloaded
+    self.sepa_downloaded = true
+    self.save
+  end
+
+  def unmark_sepa_downloaded
+    self.sepa_downloaded = false
+    self.save
+  end
+
   def init
     self.invoice_date = Time.now unless invoice_date
     self.invoice_number = generate_invoice_number(1) unless self.invoice_number