fix: handle customer primary contact better

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    lockstep_rails (0.3.83)
+    lockstep_rails (0.3.84)
       rails
 
 GEM

app/models/lockstep/invoice.rb

@@ -6,7 +6,6 @@ class Lockstep::Invoice < Lockstep::ApiRecord
   load_schema(Schema::Invoice)
 
   belongs_to :connection, class_name: 'Lockstep::Connection', foreign_key: :customer_id
-  belongs_to :customer_primary_contact, {:class_name=>"Lockstep::Contact", :included=>true}
 
   scope :einvoices, -> { where(is_e_invoice: true).include_object(:customer, :lines, :attachments) }
   scope :received_einvoices, -> { einvoices.where(invoice_type_code: 'AP Invoice') }
@@ -16,4 +15,10 @@ def download_pdf
     response = resource.get "#{id}/pdf"
     response.body
   end
+
+  def customer_primary_contact
+    return nil unless attributes['customer_primary_contact'].present?
+
+    Lockstep::Contact.new attributes['customer_primary_contact']
+  end
 end

app/platform_api/schema/invoice.rb

@@ -280,7 +280,6 @@ def self.id_ref
   belongs_to :connection, {:class_name=>"Lockstep::Connection", :primary_key=>:company_id, :foreign_key=>"customer_id"}
   belongs_to :created_user, {:class_name=>"Lockstep::User", :primary_key=>:user_id, :foreign_key=>"created_user_id"}
   belongs_to :modified_user, {:class_name=>"Lockstep::User", :primary_key=>:user_id, :foreign_key=>"modified_user_id"}
-  belongs_to :customer_primary_contact, {:class_name=>"Lockstep::Contact", :included=>true}
 
   has_many :workflow_statuses, {:class_name=>"Schema::InvoiceWorkflowStatusHistory", :included=>true}
   has_many :addresses, {:class_name=>"Schema::InvoiceAddress", :included=>true}

lib/lockstep_rails/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module LockstepRails
-  VERSION = '0.3.83'
+  VERSION = '0.3.84'
 end