bulk upload setup error for location

app/services/bulk_upload/lettings/row_parser.rb

@@ -186,6 +186,7 @@ class BulkUpload::Lettings::RowParser
 
   validate :validate_location_related
   validate :validate_location_exists
+  validate :validate_location_data_given
 
   def valid?
     errors.clear
@@ -244,7 +245,13 @@ private
 
   def validate_location_exists
     if scheme && field_5.present? && location.nil?
-      errors.add(:field_5, "Location could be found with provided scheme code", category: :setup)
+      errors.add(:field_5, "Location could be found with provided scheme code")
+    end
+  end
+
+  def validate_location_data_given
+    if bulk_upload.supported_housing? && field_5.blank?
+      errors.add(:field_5, "The scheme code must be present", category: "setup")
     end
   end
 

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -353,6 +353,17 @@ RSpec.describe BulkUpload::Lettings::RowParser do
     end
 
     describe "#field_5" do
+      context "when not nullable" do
+        let(:bulk_upload) { create(:bulk_upload, :lettings, user:, needstype: 2) }
+        let(:attributes) { { bulk_upload:, field_1: "2", field_5: nil } }
+
+        it "cannot be nulled" do
+          setup_errors = parser.errors.select { |e| e.options[:category] == "setup" }
+
+          expect(setup_errors.find { |e| e.attribute == :field_5 }).to be_present
+        end
+      end
+
       context "when location does not exist" do
         let(:scheme) { create(:scheme, :with_old_visible_id, owning_organisation: owning_org) }
         let(:attributes) do