Add validation

app/models/validations/local_authority_validations.rb

@@ -9,6 +9,26 @@ module Validations::LocalAuthorityValidations
     end
   end
 
+  def validate_la(record)
+    if record.la.present? && !LONDON_BOROUGHS.include?(record.la) && record.is_london_rent?
+      record.errors.add :la, I18n.t("validations.property.la.london_rent")
+      if record.postcode_known? && record.postcode_full.present?
+        record.errors.add :postcode_full, I18n.t("validations.property.la.london_rent_postcode")
+      end
+    end
+
+    if record.la_known? && record.la.blank?
+      record.errors.add :la, I18n.t("validations.property.la.la_known")
+    end
+
+    if record.owning_organisation && record.owning_organisation.local_authorities.present? &&
+      record.la && !record.owning_organisation.local_authorities.include?(record.la)
+        la_name = record.form.get_question("la", record).label_from_value(record.la)
+        org_name = record.owning_organisation.name
+        record.errors.add :la, I18n.t("validations.property.la.la_invalid_for_org", org_name:, la_name:)
+    end
+  end
+
   LONDON_BOROUGHS = %w[E09000001
                        E09000002
                        E09000003
@@ -42,16 +62,4 @@ module Validations::LocalAuthorityValidations
                        E09000031
                        E09000032
                        E09000033].freeze
-  def validate_la(record)
-    if record.la.present? && !LONDON_BOROUGHS.include?(record.la) && record.is_london_rent?
-      record.errors.add :la, I18n.t("validations.property.la.london_rent")
-      if record.postcode_known? && record.postcode_full.present?
-        record.errors.add :postcode_full, I18n.t("validations.property.la.london_rent_postcode")
-      end
-    end
-
-    if record.la_known? && record.la.blank?
-      record.errors.add :la, I18n.t("validations.property.la.la_known")
-    end
-  end
 end

config/locales/en.yml

@@ -70,6 +70,7 @@ en:
         london_rent: "Local authority must be in London"
         london_rent_postcode: "The postcode must be a London postcode because you told us the rent type is London Affordable Rent or London Living Rent"
         la_known: "Enter name of local authority"
+        la_invalid_for_org: "%{org_name} does not operate in %{la_name}"
       rsnvac:
         first_let_not_social: "Reason for vacancy cannot be first let if unit has been previously let as social housing"
         first_let_social: "Reason for vacancy must be first let if unit has been previously let as social housing"

spec/models/validations/local_authority_validations_spec.rb

@@ -77,5 +77,40 @@ RSpec.describe Validations::LocalAuthorityValidations do
           .to include(match I18n.t("validations.property.la.la_known"))
       end
     end
+
+    context "when the organisation only operates in specific local authorities" do
+      let(:organisation) { FactoryBot.create(:organisation) }
+      let(:record) { FactoryBot.create(:case_log, owning_organisation: organisation) }
+
+      before do
+        FactoryBot.create(:organisation_la, organisation:, ons_code: "E07000178")
+        FactoryBot.create(:organisation_la, organisation:, ons_code: "E09000033")
+      end
+
+      it "validates that the local authority is one the owning organisation operates in" do
+        record.la = "E06000014"
+        local_auth_validator.validate_la(record)
+        expect(record.errors["la"])
+          .to include(match I18n.t(
+            "validations.property.la.la_invalid_for_org",
+            org_name: organisation.name,
+            la_name: "York",
+          ))
+      end
+
+      it "expects that the local authority can be one that the owning organisation operates in" do
+        record.la = "E07000178"
+        local_auth_validator.validate_la(record)
+        expect(record.errors["la"]).to be_empty
+      end
+    end
+
+    context "when the organisation has not listed specific local authorities it operates in" do
+      it "does not validate the local authority for the organisation" do
+        record.la = "E06000014"
+        local_auth_validator.validate_la(record)
+        expect(record.errors["la"]).to be_empty
+      end
+    end
   end
 end