highlight missing field

app/models/scheme.rb

@@ -10,6 +10,8 @@ class Scheme < ApplicationRecord
   scope :search_by_postcode, ->(postcode) { joins(:locations).where("locations.postcode ILIKE ?", "%#{postcode.delete(' ')}%") }
   scope :search_by, ->(param) { search_by_postcode(param).or(search_by_service_name(param)).or(search_by_code(param)).distinct }
 
+  validates :organisation_id, presence: { message: I18n.t("validations.scheme.organisation_id_missing") }
+
   SENSITIVE = {
     No: 0,
     Yes: 1,

config/locales/en.yml

@@ -44,9 +44,12 @@ en:
         scheme:
           attributes:
             organisation:
-              required: "Enter the organisation’s name"
+              required: ""
 
   validations:
+    scheme:
+      organisation_id_missing: "Enter the organisation’s name"
+
     organisation:
       name_missing: "Enter the organisation’s name"
       provider_type_missing: "Select the organisation’s type"