Create org la relation

app/models/organisation.rb

@@ -3,6 +3,7 @@ class Organisation < ApplicationRecord
   has_many :owned_case_logs, class_name: "CaseLog", foreign_key: "owning_organisation_id"
   has_many :managed_case_logs, class_name: "CaseLog", foreign_key: "managing_organisation_id"
   has_many :data_protection_confirmations
+  has_many :organisation_las
 
   has_paper_trail
 

app/models/organisation_la.rb

@@ -0,0 +1,2 @@
+class OrganisationLa < ApplicationRecord
+end

db/migrate/20220420165451_create_organisation_la.rb

@@ -0,0 +1,10 @@
+class CreateOrganisationLa < ActiveRecord::Migration[7.0]
+  def change
+    create_table :organisation_las do |t|
+      t.belongs_to :organisation
+      t.column :ons_code, :string
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2022_04_11_092231) do
+ActiveRecord::Schema[7.0].define(version: 202202071123100) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -256,6 +256,14 @@ ActiveRecord::Schema[7.0].define(version: 2022_04_11_092231) do
     t.datetime "created_at", default: -> { "CURRENT_TIMESTAMP" }
   end
 
+  create_table "organisation_las", force: :cascade do |t|
+    t.bigint "organisation_id"
+    t.string "ons_code"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["organisation_id"], name: "index_organisation_las_on_organisation_id"
+  end
+
   create_table "organisations", force: :cascade do |t|
     t.string "name"
     t.string "phone"

spec/factories/organisation.rb

@@ -8,4 +8,11 @@ FactoryBot.define do
     created_at { Time.zone.now }
     updated_at { Time.zone.now }
   end
+
+  factory :organisation_la do
+    organisation
+    ons_code { "E07000041" }
+    created_at { Time.zone.now }
+    updated_at { Time.zone.now }
+  end
 end

spec/models/organisation_spec.rb

@@ -29,6 +29,16 @@ RSpec.describe Organisation, type: :model do
       end
     end
 
+    context "when the organisation only operates in specific local authorities" do
+      before do
+        FactoryBot.create(:organisation_la, organisation_id: organisation.id)
+      end
+
+      it "has local authorities associated" do
+        expect(organisation.organisation_las.pluck(:ons_code)).to eq(["E07000041"])
+      end
+    end
+
     context "with case logs" do
       let(:other_organisation) { FactoryBot.create(:organisation) }
       let!(:owned_case_log) do