Add and derive totelder field (#167)

app/models/case_log.rb

@@ -133,7 +133,7 @@ class CaseLog < ApplicationRecord
   enum postcode_known: POLAR, _suffix: true
   enum la_known: POLAR, _suffix: true
 
-  AUTOGENERATED_FIELDS = %w[id status created_at updated_at discarded_at renttype lettype is_la_inferred totchild].freeze
+  AUTOGENERATED_FIELDS = %w[id status created_at updated_at discarded_at renttype lettype is_la_inferred totchild totelder].freeze
   OPTIONAL_FIELDS = %w[postcode_known
                        la_known
                        first_time_property_let_as_social_housing].freeze
@@ -214,6 +214,12 @@ private
     self.is_la_inferred = false if is_la_inferred.nil?
     self.la = get_la(property_postcode)
     self.totchild = get_totchild
+    self.totelder = get_totelder
+  end
+
+  def get_totelder
+    ages = [age1, age2, age3, age4, age5, age6, age7, age8]
+    ages.count { |x| !x.nil? && x >= 60 }
   end
 
   def get_totchild

db/migrate/20211214153925_add_totelder.rb

@@ -0,0 +1,7 @@
+class AddTotelder < ActiveRecord::Migration[6.1]
+  def change
+    change_table :case_logs, bulk: true do |t|
+      t.column :totelder, :integer
+    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.define(version: 2021_12_14_143841) do
+ActiveRecord::Schema.define(version: 2021_12_14_153925) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -171,11 +171,12 @@ ActiveRecord::Schema.define(version: 2021_12_14_143841) do
     t.integer "lettype"
     t.integer "postcode_known"
     t.integer "la_known"
+    t.boolean "is_la_inferred"
     t.integer "day"
     t.integer "month"
     t.integer "year"
-    t.boolean "is_la_inferred"
     t.integer "totchild"
+    t.integer "totelder"
     t.index ["discarded_at"], name: "index_case_logs_on_discarded_at"
     t.index ["managing_organisation_id"], name: "index_case_logs_on_managing_organisation_id"
     t.index ["owning_organisation_id"], name: "index_case_logs_on_owning_organisation_id"

spec/models/case_log_spec.rb

@@ -1070,6 +1070,9 @@ RSpec.describe Form, type: :model do
           relat3: "Child - includes young adult and grown-up",
           relat4: "Other",
           relat5: "Child - includes young adult and grown-up",
+          age4: 60,
+          age2: 14,
+          age6: 88,
         })
       end
 
@@ -1079,6 +1082,13 @@ RSpec.describe Form, type: :model do
         record_from_db = ActiveRecord::Base.connection.execute("select totchild from case_logs where id=#{household_case_log.id}").to_a[0]
         expect(record_from_db["totchild"]).to eq(3)
       end
+
+      it "correctly derives and saves totelder" do
+        household_case_log.reload
+
+        record_from_db = ActiveRecord::Base.connection.execute("select totelder from case_logs where id=#{household_case_log.id}").to_a[0]
+        expect(record_from_db["totelder"]).to eq(2)
+      end
     end
   end
 end