Adopt Rails 5 belongs_to_required_by_default

spec/factories/group_order.rb

@@ -5,6 +5,7 @@ FactoryBot.define do
   # requires order
   factory :group_order do
     ordergroup { create(:user, groups: [FactoryBot.create(:ordergroup)]).ordergroup }
+    updated_by { create :user }
   end
 
 end

spec/factories/invoice.rb

@@ -6,6 +6,7 @@ FactoryBot.define do
     supplier
     number { rand(1..99999) }
     amount { rand(0.1..26.0).round(2) }
+    created_by { create :user }
 
     after :create do |invoice|
       invoice.supplier.reload

spec/factories/order.rb

@@ -6,6 +6,8 @@ FactoryBot.define do
     starts { Time.now }
     supplier { create :supplier, article_count: (article_count.nil? ? true : article_count) }
     article_ids { supplier.articles.map(&:id) unless supplier.nil? }
+    created_by { create :user }
+    updated_by { create :user }
 
     transient do
       article_count { true }

spec/factories/supplier.rb

@@ -11,6 +11,12 @@ FactoryBot.define do
       article_count { 0 }
     end
 
+    before :create do |supplier, evaluator|
+      next if supplier.class == SharedSupplier
+      next if supplier.supplier_category_id?
+      supplier.supplier_category = create :supplier_category
+    end
+
     after :create do |supplier, evaluator|
       article_count = evaluator.article_count
       article_count = rand(1..99) if article_count == true
@@ -20,4 +26,9 @@ FactoryBot.define do
     factory :shared_supplier, class: SharedSupplier
   end
 
+  factory :supplier_category do
+    sequence(:name) { |n| Faker::Lorem.characters(number: rand(2..12)) + " ##{n}" }
+    financial_transaction_class
+  end
+
 end