Initial commit

db/migrate/20181210162905_drop_operations_constraints.rb

@@ -0,0 +1,9 @@
+class DropOperationsConstraints < ActiveRecord::Migration[4.2]
+  def change
+    %i[liabilities assets revenues expenses].each do |op|
+      change_column_null(op, :reference_id, true)
+      change_column_null(op, :reference_type, true)
+    end
+  end
+end
+