changing view for group_order_invoices

testing ui of goi restructuring

app/models/group.rb

@@ -6,6 +6,8 @@ class Group < ApplicationRecord
 
   has_many :memberships, dependent: :destroy
   has_many :users, -> { where(deleted_at: nil) }, through: :memberships
+  has_one :sepa_account_holder, dependent: :destroy
+  accepts_nested_attributes_for :sepa_account_holder, allow_destroy: true
 
   validates :name, presence: true, length: { in: 1..25 }
   validates :name, uniqueness: true