Version schemes and locations (#799)

app/models/location.rb

@@ -3,6 +3,8 @@ class Location < ApplicationRecord
   validates :units, :type_of_unit, :mobility_type, presence: true
   belongs_to :scheme
 
+  has_paper_trail
+
   before_save :lookup_postcode!, if: :postcode_changed?
 
   attr_accessor :add_another_location

app/models/scheme.rb

@@ -4,6 +4,8 @@ class Scheme < ApplicationRecord
   has_many :locations
   has_many :case_logs
 
+  has_paper_trail
+
   scope :filter_by_id, ->(id) { where(id: (id.start_with?("S") ? id[1..] : id)) }
   scope :search_by_service_name, ->(name) { where("service_name ILIKE ?", "%#{name}%") }
   scope :search_by_postcode, ->(postcode) { joins("LEFT JOIN locations ON locations.scheme_id = schemes.id").where("locations.postcode ILIKE ?", "%#{postcode.delete(' ')}%") }

spec/models/location_spec.rb

@@ -56,6 +56,20 @@ RSpec.describe Location, type: :model do
     end
   end
 
+  describe "paper trail" do
+    let(:location) { FactoryBot.create(:location) }
+    let!(:name) { location.name }
+
+    it "creates a record of changes to a log" do
+      expect { location.update!(name: "new test name") }.to change(location.versions, :count).by(1)
+    end
+
+    it "allows case logs to be restored to a previous version" do
+      location.update!(name: "new test name")
+      expect(location.paper_trail.previous_version.name).to eq(name)
+    end
+  end
+
   describe "scopes" do
     before do
       FactoryBot.create(:location, name: "ABC", postcode: "NW18RR")

spec/models/scheme_spec.rb

@@ -8,6 +8,20 @@ RSpec.describe Scheme, type: :model do
       expect(scheme.owning_organisation).to be_a(Organisation)
     end
 
+    describe "paper trail" do
+      let(:scheme) { FactoryBot.create(:scheme) }
+      let!(:name) { scheme.service_name }
+
+      it "creates a record of changes to a log" do
+        expect { scheme.update!(service_name: "new test name") }.to change(scheme.versions, :count).by(1)
+      end
+
+      it "allows case logs to be restored to a previous version" do
+        scheme.update!(service_name: "new test name")
+        expect(scheme.paper_trail.previous_version.service_name).to eq(name)
+      end
+    end
+
     describe "scopes" do
       let!(:scheme_1) { FactoryBot.create(:scheme) }
       let!(:scheme_2) { FactoryBot.create(:scheme) }